User’s Guide
AC Power Solutions
Agilent Models 6811B, 6812B, and 6813B
For instruments with Serial Numbers:
Agilent 6811B: US38390101-up
Agilent 6812B: US38390101-up
Agilent 6813B: US38390101-up
Agilent Part No. 5962-0829
Microfiche No 5962-0830
Printed in U.S.A.
December, 1998
Update April 2000
Download from Www.Somanuals.com. All Manuals Search And Download.
Safety Summary
The following general safety precautions must be observed during all phases of operation of this instrument.
Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument. Agilent Technologies assumes no liability
for the customer’s failure to comply with these requirements.
WARNING: LETHAL VOLTAGES
Ac sources can supply 425 V peak at their output. DEATH on contact may result if the output terminals or circuits
connected to the output are touched when power is applied.
GENERAL
This product is a Safety Class 1 instrument (provided with a protective earth terminal). The protective features of
this product may be impaired if it is used in a manner not specified in the operation instructions.
Any LEDs used in this product are Class 1 LEDs as per IEC 825-1.
ENVIRONMENTAL CONDITONS
This instrument is intended for indoor use in an installation category II, pollution degree 2 environment. It is
designed to operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters. Refer to the
specifications tables for the ac mains voltage requirements and ambient operating temperature range.
BEFORE APPLYING POWER
Verify that the product is set to match the available line voltage, the correct fuse is installed, and all safety
precautions are taken. Note the instrument’s external markings described under "Safety Symbols".
GROUND THE INSTRUMENT
To minimize shock hazard, the instrument chassis and cover must be connected to an electrical ground. The
instrument must be connected to the ac power mains through a grounded power cable, with the ground wire firmly
connected to an electrical ground (safety ground) at the power outlet. Any interruption of the protective (grounding)
conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in
personal injury.
ATTENTION: Un circuit de terre continu est essentiel en vue du fonctionnement sécuritaire de l’appareil.
Ne jamais mettre l'appareil en marche lorsque le conducteur de mise … la terre est d‚branch‚.
FUSES
Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be
used. Do not use repaired fuses or short-circuited fuseholders. To do so could cause a shock or fire hazard.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes.
DO NOT REMOVE THE INSTRUMENT COVER
Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be
made only by qualified service personnel.
Instruments that appear damaged or defective should be made inoperative and secured against unintended
operation until they can be repaired by qualified service personnel.
3
Download from Www.Somanuals.com. All Manuals Search And Download.
SAFETY SYMBOLS
Direct current
Alternating current
Both direct and alternating current
Three-phase alternating current
Earth (ground) terminal
Protective earth (ground) terminal
Frame or chassis terminal
Terminal is at earth potential. Used for measurement and control circuits designed to be
operated with one terminal at earth potential.
Terminal for Neutral conductor on permanently installed equipment
Terminal for Line conductor on permanently installed equipment
On (supply)
Off (supply)
Standby (supply). Units with this symbol are not completely disconnected from ac mains when
this switch is off. To completely disconnect the unit from ac mains, either disconnect the power
cord or have a qualified electrician install an external switch.
In position of a bi-stable push control
Out position of a bi-stable push control
Caution, risk of electric shock
Caution, hot surface
Caution (refer to accompanying documents)
The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like,
which, if not correctly performed or adhered to, could result in personal injury. Do not proceed
beyond a WARNING sign until the indicated conditions are fully understood and met.
WARNING
Caution
The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like,
which, if not correctly performed or adhered to, could result in damage to or destruction of part
or all of the product. Do not proceed beyond a CAUTION sign until the indicated conditions
are fully understood and met.
4
Download from Www.Somanuals.com. All Manuals Search And Download.
Declaration Page
DECLARATION OF CONFORMITY
according to ISO/IEC Guide 22 and EN 45014
Manufacturer’s Name:
Manufacturer’s Address:
Agilent Technologies, Inc.
140 Green Pond Road
Rockaway, New Jersey 07866
U.S.A.
declares that the Product
Product Name:
a) AC Power Source/Analyzer
b) Harmonic/Flicker Test System
Model Number(s):
a) Agilent 6811B, 6813B, 6812B, 6811A, 6812A, 6813A
b) Agilent 6841A, 6842A
conforms to the following Product Specifications:
Safety:
EMC:
IEC 1010-1:1990+A1(1992) / EN 61010-1:1993
CISPR 11:1990 / EN 55011:1991 - Group 1 Class A
IEC 801-2:1991 / EN 50082-1:1992 - 4 kV CD, 8 kV AD
IEC 801-3:1984 / EN 50082-1:1992 - 3 V / m
IEC 801-4:1988 / EN 50082-1:1992 - 0.5 kV Signal Lines
1 kV Power Lines
Supplementary Information:
The product herewith complies with the requirements of the Low Voltage Directive
73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking accordingly.
New Jersey
Location
January 1997
Date
__
__
Bruce Krueger / Quality Manager
European Contact: Your local Agilent Technologies Sales and Service Office or Agilent Technologies GmbH,
Department TRE, Herrenberger Strasse 130, D-71034 Boeblingen (FAX:+49-7031-14-3143)
5
Download from Www.Somanuals.com. All Manuals Search And Download.
Acoustic Noise Information
Herstellerbescheinigung
Diese Information steht im Zusammenhang mit den Anforderungen der
Maschinenläminformationsverordnung vom 18 Januar 1991.
* Schalldruckpegel Lp <70 dB(A)
* Am Arbeitsplatz
* Normaler Betrieb
* Nach EN 27779 (Typprüfung).
Manufacturer’s Declaration
This statement is provided to comply with the requirements of the German Sound Emission Directive,
from 18 January 1991.
* Sound Pressure Lp <70 dB(A)
* At Operator Position
* Normal Operation
* According to EN 27779 (Type Test).
Printing History
The edition and current revision of this manual are indicated below. Reprints of this manual containing
minor corrections and updates may have the same printing date. Revised editions are identified by a new
printing date. A revised edition incorporates all new or corrected material since the previous printing
date.
Changes to the manual occurring between revisions are covered by change sheets shipped with the
manual. In some cases, the manual change applies only to specific instruments. Instructions provided on
the change sheet will indicate if a particular change applies only to certain instruments.
This document contains proprietary information protected by copyright. All rights are reserved. No part
of this document may be photocopied, reproduced, or translated into another language without the prior
consent of Agilent Technologies. The information contained in this document is subject to change
without notice.
Copyright 1995, 1997, 1998 Agilent Technologies, Inc.
Edition 1 _________August, 1995
Edition 2 _________February, 1997
Edition 3 _________March, 1998
Edition 4 _________December 1998
Update _________April 2000
6
Download from Www.Somanuals.com. All Manuals Search And Download.
Table of Contents
Warranty Information
Safety Summary
Declaration of Conformity
Acoustic Noise Information
Printing History
2
3
5
6
6
7
Table of Contents
1 GENERAL INFORMATION
Document Orientation
Earlier AC Source Models
Safety Considerations
11
11
12
12
12
13
14
14
15
16
16
16
17
18
18
18
18
19
Options and Parts
Description
Capabilities
Front Panel/Remote Operation
Steady-state Output Characteristic
Peak Current/Dynamic Power Capability
Peak Current Limit
Peak Inrush Example
RMS Current Limit Circuit
Voltage Regulation
Real Time Regulation
RMS Regulation
Output Impedance
Output Coupling
2 INSTALLATION
Inspection
21
21
21
21
21
21
22
22
22
23
23
23
24
25
25
25
27
27
27
28
28
28
Damage
Packaging Material
Items Supplied
Cleaning
Location
Bench Operation
Rack Mounting
Input Connections
Input Source and Line Fuse
Installing the Power Cord
Output Connections
Wire Considerations
Voltage Drops
Remote Sense Connections
Remote Sensing and OVP Considerations
Trigger Connections
Digital Connections
Controller Connections
GPIB Connector
RS-232 Interface
7
Download from Www.Somanuals.com. All Manuals Search And Download.
3 TURN-ON CHECKOUT
Introduction
31
31
31
32
32
34
34
35
Preliminary Checkout
Using the Keypad
Checkout Procedure
In Case of Trouble
Error Messages
Line Fuse
4 FRONT PANEL OPERATION
Introduction
37
37
37
39
40
40
40
41
42
44
45
46
47
47
47
48
48
49
50
53
55
57
58
58
Front Panel Description
System Keys
Function Keys
Immediate Action Keys
Scrolling Keys
Meter Display Keys
Output Control Keys
Protection and Status Control Keys
Trigger and List Control Keys
Entry Keys
Examples of Front Panel Programming
1 - Setting the Output Voltage Amplitude
2 - Setting the Output Frequency
3 - Setting the DC Offset
4 - Setting a Protection Feature
5 - Clearing Protection Conditions
6 - Using Transient Voltage Modes
7 - Trigger Delays and Phase Synchronization
8 - Using Slew Rates to Generate Waveforms
9 - Measuring Peak Inrush Current
10 - Setting the GPIB Address and RS-232 Parameters
11 - Saving and Recalling Operating States
A SPECIFICATIONS
Specifications
59
59
61
53
Supplemental Characteristics
Operation Below 45 Hz
B VERIFICATION AND CALIBRATION
Introduction
65
65
65
66
67
67
67
68
68
71
71
Equipment Required
Test Setup
Performing the Verification Tests
Turn-On Checkout Procedure
AC Voltage Programming and Measurement Accuracy
DC Voltage Programming and Measurement Accuracy
RMS Current Accuracy Test
Performing the Calibration Procedure
Front Panel Calibration Menu
Front Panel Calibration
72
8
Download from Www.Somanuals.com. All Manuals Search And Download.
Enable Calibration Mode
72
72
73
73
74
74
75
75
75
76
76
76
76
Calibrating and Entering Voltage Offset Values
Calibrating and Entering DC Voltage Gain Values
Calibrating and Entering AC rms Voltage Gain Values
Calibrating the OVP Trip Point
Calibrating and Entering rms Current Values
Calibrating and Entering rms Current Measurement Values
Calibrating the Output Impedance
Saving the Calibration Constants
Changing the Calibration Password
Calibration Error Messages
Calibration Over the GPIB
Agilent Calibration Program Listing
C ERROR MESSAGES
81
81
Error Number List
D LINE VOLTAGE CONVERSION
Open the Unit
85
85
85
85
85
86
Check the Jumper Wire (Model Agilent 6811B/6812B only)
Check the Line Jumpers (all Models)
Check the Power Transformer Connector (all Models)
Close the Unit
INDEX
87
9
Download from Www.Somanuals.com. All Manuals Search And Download.
Download from Www.Somanuals.com. All Manuals Search And Download.
1
General Information
Document Orientation
This manual describes the operation of the Agilent 6811B/6812B/6813B AC Power Solutions. These units
will be referred to as "ac sources" throughout this manual. The following documents are shipped with
your ac source:
♦
♦
♦
♦
a Quick-Start Guide, to help you quickly get started using the ac source
a User’s Guide, containing detailed installation, checkout, and front panel information
a Programming Guide, containing detailed GPIB programming information
a Quick Reference Card, designed as a memory jogger for the experienced user
You will find information on the following tasks in these guides. Refer to the table of contents of each
guide for a complete list of the topics.
Topic
Accessories and Options
Calibrating the ac source
Front panel keys
Front panel programming examples
Line voltage connections
Line voltage ratings
Line voltage conversion
Operator replaceable parts
Operator troubleshooting
Operating characteristics
Performance specifications
Quick operating checkout
Rack mounting
Location
Chapter 1 - this guide
Appendix B - this guide
Chapter 4 - this guide
Chapter 4 - this guide
Chapter 2 - this guide
Appendix A - this guide
Appendix D - this guide
Chapter 1 - this guide
Chapter 3 - this guide
Appendix A - this guide
Appendix A - this guide
Chapter 3 - this guide
Chapter 2 - this guide
Chapter 2 - this guide
Chapter 3 - Programming Guide
Chapter 4 - Programming Guide
Chapter 3 - this guide
Chapter 2 - this guide
Chapter 2 - this guide
Chapter 2 - this guide
Chapter 2 - this guide
Chapter 2 - this guide
RS-232 operation
SCPI programming examples
SCPI programming commands
Turn-on/checkout
Wiring - discrete fault indicator (DFI)
- GPIB controller
- load or loads
- voltage sensing (local and remote)
- remote inhibit (RI)
11
Download from Www.Somanuals.com. All Manuals Search And Download.
1 - General Information
Earlier AC Source Models
With the exception of some minor readback specification differences, information in this manual also
applies to the following earlier ac source models:
Information about this
current model
also applies to the following earlier
models:
Agilent 6811B
Agilent 6812B
Agilent 6811A AC Power Source/Analyzer
Agilent 6812A AC Power Source/Analyzer
Agilent 6841A Harmonic/Flicker Test System
in normal mode
Agilent 6813B
Agilent 6813A AC Power Source/Analyzer
Agilent 6842A Harmonic/Flicker Test System
in normal mode
Safety Considerations
This ac source is a Safety Class 1 instrument, which means it has a protective earth terminal. That
terminal must be connected to earth ground through a power source equipped with a ground receptacle.
Refer to the Safety Summary page at the beginning of this guide for general safety information. Before
installation or operation, check the ac source and review this guide for safety warnings and instructions.
Safety warnings for specific procedures are located at appropriate places in the guide.
Options and Parts
Table 1-1. Options
Option
0BN
1CM
1CP
100
Model
Description
All
All
All
Extra documentation
Rack mount kit (Agilent p/n 5062-3977)
Rack mount kit with handles (Agilent p/n 5062-3983)
87-106 Vac, 48-63 Hz (Japan only)
Agilent 6811B/6812B
Agilent 6813B
200
174-106 Vac, 48-63 Hz (Japan only)
230
831
832
Agilent 6811B/6812B
Agilent 6812B/6813B
Agilent 6813B
191-254 Vac, 48-63 Hz
12 AWG, 200 to 240 Vac, unterminated
4-mm2 wire size, unterminated
833
834
841
842
844
845
846
847
Agilent 6812B
Agilent 6812B
Agilent 6812B/6813B
Agilent 6813B
Agilent 6813B
Agilent 6812B
Agilent 6812B
Agilent 6812B
1.5-mm2 wire size, 200 to 240 Vac, unterminated
10 AWG, 100 to 120 Vac, unterminated
Line cord with NEMA 6-20P; 20A, 250 V plug
Line cord with IEC 309; 32A, 220 V plug
Line cord with NEMA 6-30P; 30A, 250 V locking plug
Line cord with IEC 309; 16 A, 220 V plug
Line cord with NEMA L5-30P; 30 A, 120 V plug
Line cord with CEE 7/7; 16 A, 220 V plug
848
Agilent 6812B
Line cord with BS 546; 15 A, 240 V plug
Support rails (Agilent p/n 1494-0059) are required when rack mounting units with options 1CM and 1CP.
Agilent 6811B units are shipped with the correct line cord for the destination country.
12
Download from Www.Somanuals.com. All Manuals Search And Download.
General Information - 1
The following table lists some common user-replaceable parts:
Table 1-2. Operator Replaceable Parts
Item Agilent Part Number
Power cord assembly
Rack mount kit
4-terminal digital connector plug
Ac input safety cover (with strain relief and bushing)
Screw (3), ac input barrier block (6-32 x 5/16in)
Ac output safety cover
Line fuse for Agilent 6812B (30 AM)
Line fuse for Agilent 6813B (25 AM)
Line fuse for Agilent 6811B (20 AM)
Screw (2), ac output safety cover (m4 x 0.7in)
Screw (5), ac output barrier block (6-32 x 5/16 in)
User’s Guide (this manual)
see "Options"
see "Options"
1252-1488
5040-1676
N/A
5040-1704
2110-0910
2110-0849
2110-0098
0515-0053
N/A
5962-0829
5962-0889
5962-0883
5962-0885
Programming Guide
Quick Start Guide
Quick Reference Card
Description
The ac source combines three instruments in one unit as shown in the following figure. The function
generator produces waveforms with programmable amplitude, frequency, and shape. The power
amplifier amplifies the function generator signal to produce the ac power for your application. The
measurement functions range from a simple readback of rms voltage and current, to sophisticated
capabilities such as waveform analysis.
shunt
SOURCE
DAC
BIPOLAR
MEASUREMENT
BLOCK
WAVEFORM
GENERATOR
AMPLIFIER
POWERMETER
FFT ANALYZER
Figure 1-1. AC Source Functional Elements
13
Download from Www.Somanuals.com. All Manuals Search And Download.
1 - General Information
The following model ac power sources are described in this User’s Guide:
Model
Description
Agilent 6811B
Agilent 6812B
Agilent 6813B
0-300 V rms; 375 VA (425 V peak; 40 A peak)
0-300 V rms; 750 VA (425 V peak; 40 A peak)
0-300 V rms; 1750 VA (425 V peak; 80 A peak)
Capabilities
♦
♦
♦
♦
♦
Programmable ac voltage, dc voltage, frequency, phase, and current limit.
Sine, square, clipped sine, and user-definable waveforms.
Programmable output impedance.
Voltage and frequency slew control.
Synthesized waveform generation for high resolution and accuracy in frequency, low waveform
distortion, and glitch-free phase transitions.
♦
Step and pulse output transients for generating surge, sag, dropout, and other line disturbance
simulations.
♦
♦
♦
Nonvolatile list programming for generating complex output transients or test sequences.
Nonvolatile state and waveform storage and recall.
Extensive measurement capability:
Ac rms, dc, ac+dc voltage and current and peak current.
Real, reactive, and apparent power.
Harmonic analysis of voltage and current waveforms gives amplitude, phase, and total
harmonic distortion results up to the 50th harmonic.
Triggered acquisition of digitized voltage and current with extensive post-acquisition
calculations.
All measurements made with 16-bit resolution.
♦
♦
Trigger In and Trigger Out for synchronizing transient events or measurements with external
signals.
Front panel control with 14-character vacuum flourescent display, keypad, and rotary pulse
generators for voltage and frequency settings.
♦
♦
♦
♦
♦
Built-in GPIB and RS-232 interface programming with SCPI command language.
Over-voltage, over-power, over-current, over-temperature, and RI/DFI protection features.
Built-in output and sense disconnect relays.
Output terminals floating with respect to chassis ground.
Extensive selftest, status reporting, and software calibration.
Front Panel/Remote Operation
The front panel has both rotary (RPG) and keypad controls for setting the output voltage and frequency.
The panel display provides digital readouts of a number of output measurements. Annunciators display
the operating status of the ac source. System keys let you perform system functions such as setting the
GPIB address and recalling operating states. Front panel Function keys access the ac source function
menus. Front panel Entry keys let you select and enter parameter values. Refer to Chapter 4 for a
complete description of the front panel controls.
14
Download from Www.Somanuals.com. All Manuals Search And Download.
General Information - 1
Remotely programming is accomplished from either the GPIB bus or from an RS-232 serial port. GPIB
and RS-232 programming uses SCPI commands (Standard Commands for Programmable Instruments)
that make the ac source programs compatible with those of other instruments. AC source status registers
permit remote monitoring of a wide variety of ac source operating conditions
NOTE:
Refer to the ac source Programming Guide for further information about remotely
programming the ac source.
Steady-state Output Characteristic
The ac source’s steady-state output characteristic is shown in the following figure. Steady-state
characteristics are defined as those output ratings that will be maintained by the ac source for an
indefinite time. (The section "Peak Current Capability" describes the dynamic output capability of the
unit.) The figure shows both the ac and the dc characteristics. With programmable output coupling, the ac
source can supply dc as well as ac output voltages.
Ac source operation is specified from 45 to 1000 Hz (see Appendix A). However, you can operate the
unit at frequencies less that 45 Hz. The operating characteristics of the ac source at autput frequencies
below 45 Hz are documented in Table A-3 of Appendix A.
Vdc
424 V
285W (6811B)
575W (6812B)
1350W (6813B)
Vrms
115V (6811B/6812B)
135V (6813B)
375VA (6811B)
300 V
750VA (6812B)
-2.5A (6811B)
1750VA (6813B)
-5A (6812B)
Idc
0
-Idc
-10A (6813B)
0.67A (6811B)
1.35A (6812B)
3.17A (6813B)
2.5A (6811B)
5A (6812B)
10A (6813B)
115V (6811B/6812B)
135V (6813B)
Irms
0
1.25A (6811B)
2.5A (6812B)
5.8A (6813B)
3.25A (6811B)
6.5A (6812B)
-424 V
13A (6813B)
-Vdc
DC CHARACTERISTIC
AC CHARACTERISTIC
(45Hz - 1kHz sinewave)
Figure 1-2. Steady-state Output Characteristic (in real-time mode)
15
Download from Www.Somanuals.com. All Manuals Search And Download.
1 - General Information
Peak Current/Dynamic Power Capability
The ac source can generate peak currents that exceed the rms current capability of the unit. This not only
applies when operating in ac mode, but also when programming output pulses in dc mode. Although the
unit will generate peak output currents up to 40A (Agilent 6811B/6812B) or 80A (Agilent 6813B), the unit
can only maintain this output for a limited time. If the output of the unit exceeds the limit of the safe
operating area (SOA), the unit will activate its internal protection mode and turn its output off. This SOA
limit is based on output voltage, output current, output duration, and heatsink temperature.
NOTE:
Refer to Chapter 4 on how to clear the unit when the internal protection mode has been
activated.
Peak Current Limit
By programming the peak current limit, you can prevent the unit from exceeding the safe operating area,
activating its internal protection mode, and turning the output off. The peak current limit circuit limits the
instantaneous output current. It functions by reducing the instantaneous output voltage to keep the output
peak current within the programmed limit. Because the circuit acts instantly, the effect is that it will clip
the peaks of the output voltage waveform. Additionally, with fast and/or large voltage transitions, the
unit may momentarily go into CC operating mode due to current in the output capacitor. This serves to
limit the rate of change of output voltage.
The following table gives approximate indications of how long the unit will tolerate peak output currents
before the SOA limits are exceeded. Because these values are voltage dependent, the table includes
various equivalent dc voltages along with the peak current values. The voltages shown in the table are
NOT the programmed voltages, but the average voltage values that will appear at the output when the
indicated high current condition exists. The SOA circuit becomes active at higher voltage and current
values as well as at longer duration times.
Table 1-3. Typical Peak Current Output Capacities
Agilent
6813B
20 A
Agilent 6811B
Agilent 6812B
10 A
equivalent dc voltage when current is flowing1
25
75
125
190
250
360
>100 ms >100 ms >100 ms >100 ms >100 ms >100 ms
30 A
40 A
50 A
60 A
70 A
80 A
15 A
20 A
25 A
30 A
35 A
40 A
>100 ms 100 ms
30 ms
8.4 ms
4.7 ms
3.1 ms
2.2 ms
1.7 ms
24 ms
7.6 ms
4.4 ms
2.9 ms
2.1 ms
1.6 ms
19 ms
6.8 ms
4 ms
2.6 ms
1.9 ms
1.4 ms
15 ms
5.9 ms
3.5 ms
2.3 ms
1.7 ms
1.3 ms
12 ms
5.6 ms
3.7 ms
2.6 ms
2 ms
9.2 ms
5.1 ms
3.4 ms
2.4 ms
1.8 ms
1Based on 25C ambient temperature, with heatsink temperature less than 50C.
Peak Inrush Example
The following table gives the recommended initial Ipeak settings when the ac source output is a 127 Vac or
254 Vac 60 Hz sine wave, as a function of load capacitance. The load on the output is a full-wave bridge
along with the indicated capacitor. The load resistance across the capacitor is infinite. The recommended
Ipeak will change as a function of changes in input as follows:
16
Download from Www.Somanuals.com. All Manuals Search And Download.
General Information - 1
♦
♦
♦
as voltage increases, the Ipeak setting needs to be decreased.
as frequency increases, the Ipeak setting can be increased.
as load resistance decreases, the Ipeak setting needs to be decreased.
Note that the purpose of programming the Ipeak current is to prevent the unit from activating its internal
protection mode as a result of exceeding the SOA limits, and turning the output off. These initial settings
may have to be reduced if the SOA circuit trips when the output is turned on. Sometimes trial and error
must be used to arrive at the proper values of Ipeak
.
Table 1-4. Recommended Ipeak Settings as a Function of Loop Capacitance
I
peak setting
Capacitance in µF
127 V
≤ 1100
1200
254 V
500
80 A
60 A
-
1700
700
50 A
5000
> 5000
1000
> 1000
45 A
< 45 A
The following waveform illustrates the inrush current capability of the ac source. The peak current is
limited during inrush in accord with table 1-3 to keep the ac source from turning its output off. Note that
the output current waveform returns to its normal shape when the current drops below the peak current
limit setting.
VOLTAGE IS
UNDISTORTED
(115 Vrms)
CURRENT
WAVEFORM
VOLTAGE
WAVEFORM
PEAK CURRENT
< 45 A
I PEAK=45A
0
Figure 1-3. Peak Inrush Current Example
17
Download from Www.Somanuals.com. All Manuals Search And Download.
1 - General Information
RMS Current Limit Circuit
The output rms current limit is adjustable to any value within the range of the unit. If the load attempts
to draw more current than the programmed limit, the output voltage is reduced to keep the rms current
within the limit. When the output voltage is reduced, the waveform shape is preserved. In other words, all
parts of the voltage cycle are reduced -- not just the peaks.
NOTE:
The speed at which the rms current circuit operates depends on the output voltage setting
and the load impedance. The circuit responds more slowly at low output voltages and at
high output impedances. With constant power or negative resistance loads, the rms
current limit circuit causes the output voltage to go to zero.
Voltage Regulation
Real Time Regulation
The default method of output regulation used by the ac source is real-time voltage regulation. Real-time
voltage regulation tries to provide the actual programmed waveform at the output of the ac source. It
offers the best overall programming response and fastest settling times. It does not have any limitations
for waveforms and transients with frequency content below 45 Hz.
RMS Regulation
Rms voltage regulation assists real-time regulation to level out or stabilize the rms value of the ac
component of the output voltage. Use rms voltage regulation in the following situations:
♦
♦
If you experience load regulation effects with heavy loads.
If you experience frequency regulation problems with heavy loads and you require flatter
programming accuracy at higher frequencies.
♦
In conjunction with programmable output impedance, if you wish to maintain the rms level of
output voltage as the source impedance is increases. (Refer to Output Impedance for more
information.)
The command to specify voltage regulation is VOLT:ALC:DET RTIM | RMS.
NOTE: Do not use rms voltage regulation when operating at frequencies less than 45 Hz.
Output Impedance
You can program the real and/or reactive (resistive and/or inductive) part of the output impedance of the
ac source. Inductive output impedances can be programmed in the range of 20 to 1000 microhenries.
Resistive load impedances can be programmed in the range of 0 to 1 ohms.
When programming output impedances, the lower your load impedance, the LESS programmed
impedance you can use and still maintain output voltage stability. This applies particularly for load
impedances less than 1 ohm.
18
Download from Www.Somanuals.com. All Manuals Search And Download.
General Information - 1
CAUTION:
Programming the ac source output impedance into a load with a low impedance can
cause output voltage instability, which may damage the ac source. Stability MUST
be maintained when operating the ac source with programmable resistance or
inductance.
To check for stability, monitor the output voltage with an oscilloscope. Instability exists
if a 5kHz to 20kHz oscillation, which is dependent upon the ac source’s programmed
inductance and the capacitance of the load, is present at any time during the following
procedure.
1. When programming inductance, it is recommended that you first add a series
resistance either by programming the output resistance to 1 ohm or by adding an
equivalent external resistor.
2. Slowly program the inductance to the desired level while monitoring the output for
any voltage instability. Do not proceed any further if the output shows any signs of
instability.
3. If less output resistance is required, slowly start lowering the resistance while
monitoring the output for any voltage instability. Do not proceed any further if the
output shows any signs of instability.
If you cannot achieve satisfactory results with this procedure, disable the output
impedance control and use an external impedance network.
Rms voltage regulation can be used in conjunction with programmable output impedance to regulate the
rms value of the ac component of the output voltage when programmed impedances cause distortion with
nonlinear loads or reduced output voltage due to regulation effects.
Note that real-time voltage regulation will permit the load current to cause output voltage degradation
based on the programmed impedance and current drawn from the source, whereas rms regulation will
reestablish the rms value at the programmed level.
Output Coupling
Ac output coupling mode mimics a transformer-coupled output, working to maintain zero average
output voltage. This means that the output tries to remove any dc content on the output, whether the dc
content is generated from a programmed offset or results from transients with dc content. The ac output
coupling has a corner frequency of about 2 Hz, which will not prevent transient waveforms that may have
short-term dc content, but will regulate the waveform back to an average value of zero volts in the steady
state.
Dc output coupling mode is used to generate dc offset voltages or output transients that have net dc
components. In either mode of operation, the maximum voltage that the ac source can output is limited to
425 V peak.
The ac capability of the output is limited by VA (volt-amperes) rather than power (watts). The amount of
VA available to a load can be determined by examining figure 1-2. Full output VA is available with no
limitations except for the boundaries imposed by the maximum rms voltage of 300V, and the maximum
rms current, which is model-dependent. Note that large peak power transients can be delivered by the ac
source as earlier described under "Peak Current Capability"(Appendix A documents the ac source’s
specifications and supplemental characteristics.)
19
Download from Www.Somanuals.com. All Manuals Search And Download.
Download from Www.Somanuals.com. All Manuals Search And Download.
2
Installation
Inspection
Damage
When you receive your ac source, inspect it for any obvious damage that may have occurred during
shipment. If there is damage, notify the shipping carrier and the nearest Agilent Sales and Support Office
immediately. The list of Agilent Sales and Support Offices is at the back of this guide. Warranty
information is printed in the front of this guide.
Packaging Material
Until you have checked out the ac source, save the shipping carton and packing materials in case the unit
has to be returned. If you return the ac source for service, attach a tag identifying the model number and
the owner. Also include a brief description of the problem.
Items Supplied
Check that the following items are included with your ac source. Some items are installed in the unit.
A power cord appropriate for your location. The cord may or may not be
terminated in a power plug (see "Options" in Chapter 1). If the cord is not
included, contact your nearest Agilent Sales and Support Office (refer to the
list at the back of this guide).
Power Cord
4-terminal digital plug that connects to the back of the unit.
Digital connector
Safety covers
Ac input cover with strain relief
Ac output cover
User’s Guide
Manuals
Programming Guide
Quick Start Guide
Quick Reference Card
If applicable, change sheets may be included with this guide. If there are
change sheets, make the indicated corrections in this guide.
Change page
Cleaning
Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to
clean internally.
WARNING:
To prevent electric shock, unplug the unit before cleaning.
21
Download from Www.Somanuals.com. All Manuals Search And Download.
2 - Installation
Location
Refer to the Safety Summary page at the beginning of this manual for safety-related information about
environmental conditions.
CAUTION:
Agilent 6811B/6812B units weigh 28.2 kg (62 lbs).
Agilent 6813B units weigh 32.7 kg (72 lbs).
Obtain adequate help when moving or mounting the unit in the rack.
Bench Operation
The outline diagram in figure 2-1 gives the dimensions of your ac source. The feet may be removed for
rack mounting. Your ac source must be installed in a location that allows sufficient space at the sides and
back of the unit for adequate air circulation. Minimum clearances are 1 inch (25 mm) along the sides. Do
not block the fan exhaust at the rear of the unit.
Rack Mounting
The ac source can be mounted in a standard 19-inch rack panel or cabinet. Rack mounting kits are
available as Option 1CM or 1CP. Installation instructions are included with each rack mounting kit.
Agilent ac sources also require instrument support rails in addition to the rack mount kit. Support
rails are normally ordered with the cabinet and are not included with the rack mounting kits.
TO P
REAR
425.5m m
16.75"
12.7m m
0.5"
574.7m m
22.6"
128m m
5.04"
132.6m m
5.25"
50.8m m
2.0"
SIDE
Figure 2-1. Outline Diagram
22
Download from Www.Somanuals.com. All Manuals Search And Download.
Installation - 2
Input Connections
Input Source and Line Fuse
You can operate your ac source from a single-phase ac power source as indicated on the rear panel Line
Rating label. See "ac Input Voltage Range" in Table A-2 of Appendix A for details.
NOTE:
The power ac source must be on a dedicated line with no other devices consuming
current from it.
The line fuse is located inside the ac source. Refer to "In case of Trouble" in Chapter 3 for instructions
on fuse replacement.
Installing the Power Cord
The power cord supplied with the ac source may or may not include a power plug at one end of the cord.
Figure 2-2 shows the various power plugs. Terminating connections are attached to the other end of the
cord.
Figure 2-2. Power Cord Plug Configurations
WARNING: Installation of the power cord must be done by a qualified and licensed electrician
and must be in accordance with local electrical codes.
See Figure 2-3 while performing the following procedure.
a.
If they are not already in place, position the strain relief connector (9), safety cover (5), rubber
boot (8) and connector nut (7) on the power cord (6).
b.
c.
d.
e.
Secure the ground wire (2) to the chassis earth ground stud.
Connect the neutral wire (1) to the N power input terminal.
Connect the line (3) to the L1 power input terminal.
Position the safety cover over the power input terminals and tighten the cover and strain relief
connector screws.
23
Download from Www.Somanuals.com. All Manuals Search And Download.
2 - Installation
L1
L2(N)
1. GROUND CONNECTION (GRN/YEL OR GRN)
2. LINE CONNECTION (BROWN OR BLACK)
3. NEUTRAL CONNECTION (BLUE OR WHITE)
4. POWER CORD
1
2
6
7
8
5. CONNECTOR NUT
3
4
6. RUBBER BOOT
7. POWER SAFETY COVER
8. STRAIN RELIEF CONNECTOR
5
Figure 2-3. Connecting the Power Cord
Output Connections
The power output terminal block has a floating output terminal connection and a floating neutral line for
the return connection. A separate earth ground terminal is located on the extreme right of the terminal
block.
!
SENSE
01
01
COM
COM
300 VAC MAX TO
01 PHASE 1 OUTPUT CONNECTION
COM PHASE RETURN CONNECTION
GROUND CONNECTION
Figure 2-4. Output Connections
24
Download from Www.Somanuals.com. All Manuals Search And Download.
Installation - 2
Wire Considerations
NOTE:
To minimize the possibility of instability on the output, keep load leads as short as
possible bundle or twist the leads tightly together to minimize inductance
Current Ratings
Fire Hazard To satisfy safety requirements, load wires must be large enough not to overheat
when carrying the maximum short-circuit current of the ac source. If there is more
than one load, then any pair of load wires must be capable of safely carrying the
full-rated current of the ac source.
Table 2-1 lists the characteristics of AWG (American Wire Gage) copper wire.
Table 2-1. Ampacity and Resistance of Stranded Copper Conductors
AWG No.
Ampacity1
Resistance2
AWG No.
Ampacity1
Resistance2
(Ω/m)
(Ω/m)
14
12
10
8
25
30
40
60
0.0103
0.0065
0.0041
0.0025
6
4
80
0.0016
105
140
195
0.0010
2
0.00064
0.00040
1/0
NOTES:
1. Ampacity is based on 30°C ambient temperature with conductor rated at 60°C. For ambient
temperature other than 30°C, multiply the above ampacities by the following constants:
Constant
Temp. (°C)
21-25
Temp. (°C)
41-45
Temp. (°C)
0.71
1.08
26-30
1.00
46-50
0.58
31-35
0.91
51-55
0.41
36-40
0.82
2. Resistance is nominal at 75 °C wire temperature.
Voltage Drops
The load wires must also be large enough to avoid excessive voltage drops due to the impedance of the
wires. In general, if the wires are heavy enough to carry the maximum short circuit current without
overheating, excessive voltage drops will not be a problem. Refer to Table 2-1 to calculate the voltage
drop for some commonly used AWG copper wire. If load regulation becomes a problem refer to the
section "Remote Sense Connections".
Remote Sense Connections
Under normal operation, the ac source senses the output voltage at the output terminals on the back of the
unit. External sense terminals are available on the back of the unit that allow the output voltages to be
sensed at the load, compensating for impedance losses in the load wiring. As shown in the following
figure:
25
Download from Www.Somanuals.com. All Manuals Search And Download.
2 - Installation
♦
Connect the phase 1 (1) sense terminals to the side of the load that connects to the corresponding
output terminal.
♦
♦
Connect the Neutral (COM) sense terminal connector to the neutral side of the load.
Twist and shield all signal wires to and from the sense connectors.
The sense leads are part of the ac source’s feedback path and must be kept at a low resistance in order to
maintain optimal performance. Connect the sense leads carefully so that they do not become open-
circuited.
CAUTION:
If the sense leads are left unconnected or become open during operation, the ac source
will regulate at the output terminals, but with a 40% increase in output voltage over the
programmed limit. The meter circuit cannot read back this increase in output voltage
when the sense lead is disconnected.
Set the ALC command to EXT (external) to enable remote sensing. The ALC command is located under
the Voltage key as explained in Chapter 4. Set the ALC command to INT (internal) to disable remote
sensing.
NOTE:
If you are using external relays to connect and disconnect the load and sense
connections, do NOT permit the sense connections to open when remote sensing is
enabled. First disable remote sensing, then open the sense and load connections.
!
SENSE
01
01
COM
COM
LOAD
Figure 2-5. Remote Sense Connections
26
Download from Www.Somanuals.com. All Manuals Search And Download.
Installation - 2
Remote Sensing and OVP Considerations
In remote sense applications, the voltage drop in the load leads subtracts from the available load voltage
(see "Remote Sensing Capability" in appendix A). As the ac source increases its output to overcome this
voltage drop, the sum of the programmed voltage and the load-lead drop may exceed the ac source’s
maximum voltage rating. This may trip the OV protection circuit, which senses the voltage at the output
terminals, not at the load. When using remote sensing, you must program the OVP trip voltage high
enough to compensate for the voltage drop between the output terminals and the load.
NOTE:
If the load causes the peak current limit circuit to become active, voltage transitions on
the output may cause nuisance tripping of the OVP circuit.
Trigger Connections
The BNC trigger connectors on the rear panel let you apply trigger signals to the ac source as well as
generate trigger signals from the ac source. The electrical characteristics of the trigger connectors are
described in appendix A. More information on programming external triggers is found in Chapter 4 of
the ac source Programming Guide.
Trigger IN
Allows negative-going external trigger signals to trigger the ac source.
Trigger OUT
Generates a negative-going pulse when the selected transient output has occurred.
Digital Connections
This connector, which is on the rear panel, is for connecting the fault and the inhibit signals. The fault
(FLT) signal is also referred to as the DFI signal in the front panel and SCPI commands. The inhibit
(INH) signal is also referred to as the RI signal in the front panel and SCPI commands.
The connector accepts wires sizes from AWG 22 to AWG 12. Disconnect the mating plug to make your
wire connections. The electrical characteristics of the digital connectors are described in appendix A.
More information on programming the digital connectors is found in Chapter 4 of the ac source
Programming Guide.
NOTE:
It is good engineering practice to twist and shield all signal wires to and from the digital
connectors
The following examples show how you can connect the FLT/INH circuits of the ac source.
In example A, the INH input connects to a switch that shorts pin + to pin ⊥ whenever it is necessary to
disable output of the unit. This activates the remote inhibit (RI) circuit, which turns off the ac output. The
front panel Prot annunciator comes on and the RI bit is set in the Questionable Status Event register. To
re-enable the unit, first open the connection between pins + and ⊥ and then clear the protection circuit.
This can be done either from the front panel or over the GPIB/RS-232.
27
Download from Www.Somanuals.com. All Manuals Search And Download.
2 - Installation
In example B, the FLT output of one unit is connected to the INH input of another unit. A fault condition
in one of the units will disable all of them without intervention either by the controller or external
circuitry. The controller can be made aware of the fault via a service request (SRQ) generated by the
Questionable Status summary bit.
FLT INH
I
-
+
-
+
. . . .
I
-
+
-
+
NOTE: Connectors
are removable
FLT Output
FLT INH
I
-
+
-
+
INH Input
. . . .
I
-
+
-
+
I
-
+
-
+
INH Common
INH Input
Switch
(Normally
Open)
INH Input
FLT Output
B) FLT Example with Multiple Units
A) INH Example with One Unit
Figure 2-6. FLT/INH Examples
Controller Connections
The ac source connects to a controller either through a GPIB or an RS-232 connector.
GPIB Connector
Each ac source has its own GPIB bus address. AC sources may be connected to the bus in series
configuration, star configuration, or a combination of the two. You may connect from 1 to 15 ac sources
to a controller GPIB interface.
NOTE:
28
The ac source is shipped from the factory with its GPIB address set to 5. This address
can be changed as described in Chapter 4 of this guide.
Download from Www.Somanuals.com. All Manuals Search And Download.
Installation - 2
RS-232 Interface
The ac source provides an RS-232 programming interface, which is activated by commands located under
the front panel Address key. When the RS-232 interface is selected, the GPIB interface is disabled.
NOTE:
Sending or receiving data over the RS-232 interface when not configured for REMOTE
operation can cause unpredictable results. Always make sure the ac source is configured
for remote operation when using the RS-232 interface.
Interface Commands
All SCPI commands are available through RS-232 programming. The SYSTem:LOCal,
SYSTem:REMote, and SYSTem:RWLock commands are only available through the RS-232 interface.
SYSTem:LOCal
SYSTem:REMote
SYSTem:RWLock
Places the ac source in local mode during RS-232 operation.The front panel keys
are functional.
Places the ac source in remote mode during RS-232 operation. All front panel
keys except the LOCAL key are disabled.
Places the ac source in remote mode during RS-232 operation. All front panel
keys including the LOCAL key are disabled.
RS-232 Data Format
♦
♦
♦
constant 11-bit data format
one start bit
seven data bits plus a parity bit (even or odd parity), or eight data bits without parity (parity bit is
"0")
♦
two stop bits
You can specify one of the following baud rates: 300 600 1200 2400 4800 9600
NOTE:
The ac source always uses one start bit and two stop bits regardless of the baud rate. The
number of start and stop bits is not programmable.
RS-232 Connector
The RS-232 connector is a DB-9, male connector. You can connect the ac source to any computer or
terminal with a properly configured DB-25 connector. You can use a standard Agilent 24542G or 24542H
interface cable.
Table 2-2. RS-232 Connector
Pin
1
2
3
4
5
6
7
Input/Output
Output
Description
1 2 3 4 5
Reserved for service use
Receive Data (RxD)
Transmit Data (TxD)
Data Terminal Ready (DTR)
Signal ground
Input
Output
Output
Common
Input
Data Set Ready (DSR)
no connection
6 7 8 9
8
no connection
9
Output
Reserved for service use
29
Download from Www.Somanuals.com. All Manuals Search And Download.
2 - Installation
Hardware Handshake
The RS-232 interface uses the DTR (data terminal ready) line as a holdoff signal to the bus controller.
When DTR is true, the bus controller may send data to the ac source. When DTR goes false, the bus
controller must stop sending data within 10 characters, and must not send any more data until DTR goes
true again. The ac source sets DTR false under two conditions.
1.
When the input buffer is full (approximately 100 characters have been received), it will set DTR
false. When enough characters have been removed to make space in the input buffer, DTR will
be set to true, unless condition 2 (see below) prevents this.
2.
When the ac source wants to "talk", which means that it has processed a query, and has seen a
<newline> message terminator, it will set DTR false. This implies that once a query has been
sent to the power source, the bus controller should read the response before attempting to send
more data. It also means that a <newline> must terminate the command string. After the response
has been output, the ac source will set DTR true again, unless condition #1 prevents this.
The ac source monitors the DSR (data set ready) line to determine when the bus controller is ready to
accept data. It checks this line before each character is sent, and the output is suspended if DSR is false.
When DSR goes true, transmission will resume. The ac source will leave DTR false while output is
suspended. A form of deadlock exists until the bus controller asserts DSR true to allow the ac source to
complete the transmission.
Control-C is the equivalent to the GPIB device clear command. It clears the operation in progress and
discards any pending output. For the control-C character to be recognized by the power source while it
holds DTR false, the bus controller must first set DSR false.
Null modem RS-232 interface cables swap the DTR and DSR lines as shown in the following figure. For
other bus controllers or languages, you must determine what form of hardware handshake is used. You
may have to build a customized cable to connect the holdoff lines as necessary. If your bus controller
does not use hardware handshaking, tie the DSR input to the ac source to a signal that is always true.
This implies that your bus controller must always be ready to accept data. You may want to set the baud
rate to either 2400 or 4800 baud to ensure that this is true.
bus controller
ac source
TxD (3)
RxD (2)
TxD (3)
RxD (2)
DTR (4)
*DTR (4)
*DSR (6)
DSR (6)
Ground (5)
Ground (5)
Figure 2-7. Null Modem Interface Lines
Response Data Terminator
All RS-232 response data sent by the ac source is terminated by the ASCII character pair <carriage
return><newline>. This differs from GPIB response data which is terminated by the single character
<newline>.
30
Download from Www.Somanuals.com. All Manuals Search And Download.
3
Turn-On Checkout
Introduction
Successful tests in this chapter provide a high degree of confidence that the ac source is operating
properly. For verification tests, see appendix B. Complete performance tests are given in the Service
Guide.
NOTE:
This chapter provides a preliminary introduction to the ac source front panel. See
Chapter 4 for more details.
Preliminary Checkout
WARNING: LETHAL VOLTAGES. Ac sources can supply 425 V peak at their output. DEATH
on contact may result if the output terminals or circuits connected to the output are
touched when power is applied.
1.
2.
3.
If you have not already done so, connect the power cord to the ac source and plug it in.
Turn the front panel power switch to ON (1).
The ac source undergoes a self-test when you turn it on. The following items appear on the
display:
a. A brief pattern that lights all display segments, followed by the model number and the
software revision number.
b. The display then goes into the meter mode with the Dis annunciator on, and all others off.
"Meter mode" means that the VOLTS digits indicate the output voltage and the FREQ digits
indicate the output frequency. The voltage will be at or near zero and the frequency will be at 60
Hertz.
Note: If the ac source detects an error during self-test, the Err anunciator on the display will be
lit. Pressing the Shift and Error keys will show the error number. Go to "In Case of Trouble" at
the end of this chapter.
4.
Check that the ac source fan is on. You should be able to hear the fan and feel the air coming
from the unit.
5.
6.
Press Output on/off once. The Dis annunciator will go off and the CV annunciator will go on.
Turn the unit off.
31
Download from Www.Somanuals.com. All Manuals Search And Download.
3 - Turn-On Checkout
Using the Keypad
(shift)
Some of the front panel keys perform two functions, one labeled in black and
the other in blue. You access the blue function by first pressing the blue
shift key. Release the key after you press it. The Shift annunciator will be on,
indicating that you have access to any key’s shifted function.
and
and
These keys let you scroll up and down through the choices in the presently
selected function menu. All menu lists are circular; you can return to the
starting position by continuously pressing either key.
These keys let you select the previous or the next parameter for a specific
command. If the command has a numeric range, these keys increment or
decrement the existing value.
É
The backspace key is an erase key. If you make a mistake entering a digit and
have not yet pressed Enter, you can delete the digit by pressing -. Delete
more digits by repeatedly pressing this key.
Enter
Executes the entered value or parameter of the presently accessed command.
Until you press this key, the parameters you enter with the other keys are
displayed but not entered into the ac source. After pressing Enter, the ac
source returns to Meter mode in most cases. In Harmonic or List mode, the ac
source displays the next point in the list.
Checkout Procedure
WARNING: LETHAL VOLTAGES. Ac sources can supply 425 V peak at their output. DEATH
on contact may result if the output terminals or circuits connected to the output are
touched when power is applied.
The output test requires that you connect light bulbs to the output of the unit and apply a
potentially hazardous voltage of 120 Vac. Properly shield all connections and wires.
The test in this section checks for output voltage and current on the ac source by having you connect light
bulbs to the output of the unit. The following equipment is recommended for performing this output
checkout procedure:
♦
♦
♦
1 - 100 W light bulb
1 - light bulb socket
wires for connecting socket to the unit
NOTE:
When the ac source is turned on as shipped from the factory, it asserts the *RST state.
You can subsequently program the unit to turn on according to the state stored in *RCL
location 0, as explained in Chapter 4. The following procedures assume that the unit
turns on in the *RST state.
Make sure that the unit is turned off, and make the following connections to the output.
32
Download from Www.Somanuals.com. All Manuals Search And Download.
Turn-On Checkout - 3
!
SENSE
01
01
COM
COM
100 W
Figure 3-1.Verification Connections
Procedure
Display
Explanation
1.
Turn the unit on.
Meter mode
Meter mode is active and the Dis annunciator
should be on.
2.
3.
VOLT 0.00
VOLT 120
Display indicates the default settings.
Press the Voltage key.
Press 1, 2, 0, Enter
Programs the output voltage to 120 Vrms. After
the value is entered, the display returns to Meter
mode, which indicates that no voltage is applied to
the output.
4.
120 V 60 Hz
PROT:CLEAR
Turns the output on and applies 120 volts to the
light bulb. The Dis annunciator should be off and
CV should be on.
Press Output On/Off
Press Protect
5.
6.
Display accesses the protection menu list.
Press or ô and
scroll to the
VOLT:PROT 500 Display shows the overvoltage protection trip
voltage for your unit. The overvoltage protection
VOLT:PROT item
voltage is programmed in peak, not rms volts.
7.
VOLT:PROT 160 Programs the OVP to 160 Vpeak, the rms value of
which is less than the previously set rms voltage.
Press 1, 6, 0, Enter
0 V 60 Hz
Because the peak OVP voltage entered was less
than the rms output voltage, the OVP circuit
tripped. The output dropped to zero, CV turned
off, and Prot turned on.
8.
9.
VOLT:PROT 320 Programs the OVP to a peak value that is greater
than the rms output voltage value.
Press Protect, scroll
to the VOLT:PROT
item, and press 3, 2, 0,
Enter
Note: You cannot clear an OVP trip until you
have first removed the cause of the condition.
120 V 60 Hz
Executes the PROT:CLEAR command, restoring
Press Protect, and
the output. Prot turns off and CV turns on.
Enter
33
Download from Www.Somanuals.com. All Manuals Search And Download.
3 - Turn-On Checkout
Procedure
Display
Explanation
10. Press Shift, and
CURR:LEV 5
Indicates the default output current limit setting.
Current
11.
CURR:LEV .5
Press . 5 Enter
Sets the current limit to .5 amperes. The CC
annunciator is on, indicating that the unit is in
current limit mode and the light bulbs are dimmer
because the output voltage has dropped in its
attempt to limit output current.
12. Press Protect, scroll to CURR:PROT ON You have enabled the overcurrent protection
the CURR:PROT item,
and press ° to select
ON. Then press Enter.
circuit. The circuit then tripped because of the
output short. The CC annunciator turns off and
the OCP and Prot annuciators come on. The
output current is near zero.
13. Press Output On/Off
0.5 V 60 Hz
The output is off and the Dis annunciator turns on.
14. Press Protect, scroll to CURR:PROT OFF You have disabled the overcurrent protection
the CURR:PROT item,
press ° to select OFF,
then press Enter.
circuit. The Prot annunciator turns off.
15. Turn the unit off.
The next time the unit turns on it will be restored
to the *RST or factory default state
In Case of Trouble
Error Messages
Ac source failure may occur during power-on selftest or during operation. In either case, the display may
show an error message that indicates the reason for the failure.
Selftest Errors
Pressing the Shift and Error keys will show the error number. Selftest error messages appear as:
ERROR <n>, where "n" is a number listed in the following table. If this occurs, turn the power off and
then back on to see if the error persists. If the error message persists, the ac source requires service.
Table 3-1. Power-On Selftest Errors
Error No.
Error 0
Failed Test
No error
Error 1
Non-volatile RAM RD0 section checksum failed
Non-volatile RAM CONFIG section checksum failed
Non-volatile RAM CAL section checksum failed
Non-volatile RAM WAVEFORM section checksum failed
Non-volatile RAM STATE section checksum failed
Non-volatile RAM LIST section checksum failed
RAM selftest
Error 2
Error 3
Error 4
Error 5
Error 6
Error 10
Error 11 to 18
DAC selftest 1 to 8
34
Download from Www.Somanuals.com. All Manuals Search And Download.
Turn-On Checkout - 3
Runtime Error Messages
Under unusual operating conditions, the front panel display may show OVLD. This indicates that the
output voltage or current is beyond the range of the meter readback circuit. If the front panel display
indicates -- -- -- -- -- -- , a GPIB measurement is in progress. Appendix C lists other error messages that
may appear at runtime.
Line Fuse
If the ac source appears "dead" with a blank display and the fan not running, first check your power
source to be certain line voltage is being supplied to the ac source. If the power source is normal, the ac
source line fuse may be defective. If the ac source has a defective fuse, replace it only once. If it fails
again, investigate the reason for the failure. Proceed as follows:
WARNING: Hazardous voltages can remain active inside the ac source even after it has been
turned off. Fuse replacement should be done only by a qualified electronics
technician.
The line fuse is located inside the ac source. To change it, refer to Figure 3-2 and proceed as follows:
1.
2.
Turn off the front panel power switch and unplug the line cord from the ac source.
Remove the ac cover as follows:
a. Remove the four screws securing the carrying straps and dustcover (use a T25 Torx drive).
b. Spread the bottom rear of the cover and pull it back to remove it.
3.
Observe the two LEDs on each side of the unit. If either LED is ON, there is still hazardous
voltages present inside the ac source. Wait until the LEDs are out before proceeding (it may take
several minutes for the LEDs to go out.)
4.
5.
6.
7.
Replace the fuse with one of the same type. Do not use a slow-blow type fuse
Replace the cover.
Connect the line cord to the ac source.
Turn on power and verify operation.
SIDE VIEW (WITH COVER REMOVED)
LED
FUSE
Figure 3-2. AC Source Fuse Location
35
Download from Www.Somanuals.com. All Manuals Search And Download.
Download from Www.Somanuals.com. All Manuals Search And Download.
4
Front panel Operation
Introduction
Here is what you will find in this chapter:
♦
♦
a complete description of the front panel controls
front panel programming examples that describe:
how to program the output voltage and frequency
how to measure the output
how to program the output pulses and lists
how to trigger output changes
Front Panel Description
1
2
5
6
7
300
V
/
rms 50 VA
1
6812A
AC POWER SOURCE
ANALYZER
SYSTEM
Local
FUNCTION
Current
ENTRY
Harmonic
Index
Index
Calibration
Meter
Voltage
7
8
5
2
9
1
METER
OUTPUT
115.0V 60.0HZ
Error
Output
Input
Phase
Freq
Address
CV CC CR CP Unr Dis Tran OCP Prot Cal Shift Rmt Addr Err SRQ
6
3
4
Status
Save
Shape
Recall
Protect
Phase
Select
Enter
1
VOLTAGE
FREQUENCY
List
Trigger
E
Clear Entry
-
Output
on/off
Trigger
Control
Pulse
.
0
LINE
On
Off
4
3
Figure 4-1. Front Panel, Overall View
37
Download from Www.Somanuals.com. All Manuals Search And Download.
4 - Front Panel Operation
14-character vacuum fluorescent display for showing programmed commands
and measured values.
j Display
Annunciators light to indicate operating modes and status conditions:
k Annunciators
φ1
Phase 1 is being controlled or metered.
CV The ac source output is in constant-voltage mode.
CC The ac source output is in constant-current mode.
Unr The ac source output is in an unregulated state.
Dis
The ac source output is disabled (off).
Tran The ac source output is initialized to output a transient.
OCP The overcurrent protection state is enabled.
Prot One of the ac source’s output protection features is activated.
Cal
The ac source is in calibration mode.
Shift The Shift key is pressed to access an alternate key function.
Rmt The selected interface (GPIB or RS-232) is in a remote state.
Addr The interface is addressed to talk or to listen.
Err There is a message in the SCPI error queue.
SRQ The interface is requesting service from the controller.
Meter Front panel measurement functions are: ac only, dc only, or ac+dc
AC+DC
Output The ac source output coupling is: ac only, or ac+dc
AC+DC
The rotary pulse generators let you set the output voltage and frequency when the
ac source is in local mode. Their response is rate sensitive.
l Voltage/
Frequency
Turning a control rapidly provides coarse control of the value.
Turning a control slowly provides fine control of the value.
This turns the ac source on or off.
n Line
The system keys let you:
o System Keys
Return to Local mode (front panel control)
Set the ac source GPIB address
Set the RS-232 interface communication baud rate and parity bit
Display SCPI error codes and clear the error queue
Save and recall up to 4 instrument operating configurations
Function access command menus that let you:
Program output voltage, current limit, frequency, and output waveforms
Turn the ouput on and off
p Function Keys
Select metering functions
Send immediate triggers from the front panel
Program transient output functions
Set and clear protection functions
Select output phases
Select the coupling for output and meter functions
Monitor instrument status
Entry keys let you:
q Entry Keys
Enter programming values
Increment or decrement programming values
Calibrate the ac source
38
Download from Www.Somanuals.com. All Manuals Search And Download.
Front Panel Operation - 4
System Keys
Refer to the examples later in this chapter for more details on the use of these keys.
SYSTEM
Local
Error
Address
Save
Recall
Figure 4-2. System Keys
Shift
This is the blue, unlabeled key, which is also shown as
in this guide.
Pressing this key accesses the alternate or shifted function of a key (such as
ERROR ). Release the key after you press it. The Shift annunciator is lit,
indicating that the shifted keys are active.
Local
Press to change the ac source’s selected interface from remote operation to local
(front panel) operation. Pressing the key will have no effect if the interface state
is already Local, Local-with-Lockout, or Remote-with-Lockout.
Address
Press to access the system address menu. This menu lets you configure the ac
source’s interface. Address Menu entries are stored in non-volatile memory.
Display
ADDRESS <value>
Command Function
Sets the GPIB Address
INTF <char>
Selects an interface (GPIB or RS232)
BAUDRATE<value> Selects baud rate (300, 600, 1200, 2400, 4800, 9600)
PARITY <char>
LANG <char>
Message parity (NONE, EVEN, ODD, MARK, SPACE)
Selects language (SCPI or E9012)
value = a numeric value
char = a character string parameter
Use
Use
and
and
to scroll through the command list.
to scroll through the parameter list.
Recall
Shift
Press to place the ac source into a previously stored state. You can recall up to
16 (0 through 15) previously stored states.
Error
Save
Press to display the system error codes stored in the SCPI error queue. This
action also clears the queue. If there is no error in the queue, 0 is displayed.
Shift
Press to store an existing ac source state in non-volatile memory. The parameters
saved are listed under *SAV in the ac source Programming Guide. You can
save up to 16 states (0 through 15).
39
Download from Www.Somanuals.com. All Manuals Search And Download.
4 - Front Panel Operation
Function Keys
Refer to the examples later in this chapter for more details on the use of these keys.
FUNCTION
Harmonic
Meter
Current
Index
Voltage
Phase
Freq
Output
Input
Index
Status
Shape
Phase
Protect
Select
List
Trigger
Output
on/off
Trigger
Control
Pulse
Figure 4-3. Function Keys
Immediate Action Keys
Immediate action keys immediately execute their corresponding function when pressed. Other function
keys have commands underneath them that are accessed when the key is pressed.
Output
On/Off
This key toggles the output of the ac source between the on and off states. It
immediately executes its function as soon as you press it. When off, the ac
source output is disabled and the Dis annunciator is on.
Phase
Select
This key only applies to three-phase ac sources
Shift
Trigger
Sends an immediate trigger to the ac source
Scrolling Keys
Scrolling keys let you move through the commands in the presently selected function menu.
These scroll keys let you move through the choices in a command list.
Press
to bring up the next command in the list. Press
to go back
to the previous command in the list. Function menus are circular; you can
return to the starting position by continuously pressing either key. The
following example shows the commands in the Input function menu:
Shift
Shift
Index
Index
These shifted scroll keys apply only to the Harmonic and List functions.
Press these keys to step through integers 0 through 50 when specifying the
desired harmonic number, or 0 through 99 when specifying the desired list
point. Hold down these keys to rapidly access any harmonic or list point.
¯
°
These Entry keys let you scroll through choices in a parameter list that apply
to a specific command. Parameter lists are circular; you can return to the
starting position by continuously pressing either key. If the command has a
numeric range, these keys increment or decrement the existing value.
40
Download from Www.Somanuals.com. All Manuals Search And Download.
Front Panel Operation - 4
Meter Display Keys
Metering keys control the metering functions of the ac source.
Meter
Press this key to access the meter menu list.
Display
Measurement
<reading>V <reading>Hz
<reading>V <reading>A
<reading>A <reading>Hz
<reading>V <reading>W
<reading> CREST F
<reading>A PK REP
<reading>A PK NR
<reading> VA
rms voltage and frequency (the default)
rms voltage and rms current
rms current and frequency (the default)
rms voltage and power
current crest factor
peak current, repetitive
peak current, nonrepetitive1
apparent power
<reading> VAR
reactive power
<reading> PFACTOR
power factor
Input
Press this key to specify the following metering functions.
Display
INP:COUP <char>
CURR:RANGE <char>
Command Function
Choose meter coupling (AC, DC or ACDC)
Current measurement range (HIGH or LOW)
HIGH = for measuring rms currents > 5.7 A
LOW = for measuring rms currents < 5.7 A
Select harmonic measurement window meter
(KBESSEL, RECT)
WINDOW <char>
Shift
Harmonic
Press this key to access the harmonic menu list
Display
Measurement
current harmonic magnitude
current harmonic phase
voltage harmonic magnitude
voltage harmonic phase
neutral current harmonic magnitude
neutral current harmonic phase
current total % harmonic distortion
voltage total % harmonic distortion
<reading>A I:MAG: <index>
<reading>° I:PHASE: <index>
<reading>V V:MAG: <index>
<reading>° V:PHASE: <index>
<reading> N:MAG: <index>
<reading>° N:PHASE: <index>
<reading>° CURR:THD
<reading>° VOLT:THD
Notes:
1Displays the highest peak current since it was last cleared.The value is cleared when
Enter
Clear Entry
you scroll into this selection or press
reading = the returned measurement
or
index = a numeric value that represents the harmonic number from 0 to 50
char = a character string parameter
and
and
scroll through the command list.
scroll through the parameter list.
Index
Index
and
specify the desired harmonic.
41
Download from Www.Somanuals.com. All Manuals Search And Download.
4 - Front Panel Operation
Output Control Keys
Output control keys control the output functions of the ac source.
Voltage
Press this key to access the voltage menu list.
Display
Command Function
Set immediate rms output voltage
Set triggered rms output voltage
Select the voltage mode (FIXED, STEP, PULSE or LIST)
Set immediate dc offset voltage
Set triggered dc offset voltage
Select the dc offset voltage mode (FIXED, STEP, PULSE
or LIST)
VOLT <value>
VOLT:T<value>
VOLT:M <char>
OFFSET <value>
OFFSET:T<value>
OFFSET:M <char>
SLEW <value>
SLEW:T<value>
SLEW:M <char>
Set immediate voltage slew rate in volts/second
Set triggered voltage slew rate in volts/second
Select the voltage slew mode (FIXED, STEP, PULSE or
LIST)
OFF:SLW <value>
OFF:SLW:T<value>
OFF:SLW:M <char>
Set immediate dc offset voltage slew in volts/second
Set triggered dc offset voltage slew in volts/second
Select the dc offset voltage slew mode (FIXED, STEP,
PULSE or LIST)
ALC <char>
ALC:DET <char>
Select the voltage sense source (INT or EXT)
Select the voltage sense detector (RTIME or RMS)
Shift
Current
Press this key to access the current menu list.
Display
Command Function
CURR:LEV <value>
CURR:PEAK <value>
CURR:PEAK:T <value>
Set immediate rms output current limit
Set immediate peak output current limit
Set triggered peak output current limit
CURR:PEAK:M <value> Select the peak output current limit mode (FIXED, STEP,
PULSE or LIST)
Freq
Press this key to access the frequency menu list.
Display
Command Function
Set immediate output frequency
Set triggered output frequency
Select the frequency mode (FIXED, STEP, PULSE or
LIST)
FREQ <value>
FREQ:T<value>
FREQ:M <char>
SLEW <value>
SLEW:T<value>
SLEW:M <char>
Set immediate frequency slew rate in volts/second
Set triggered frequency slew rate in volts/second
Select the frequency slew mode (FIXED, STEP, PULSE or
LIST)
Notes:
value = a numeric value
char = a character string parameter
and
and
scroll through the command list.
scroll through the parameter list.
42
Download from Www.Somanuals.com. All Manuals Search And Download.
Front Panel Operation - 4
Shift
Phase
Press this key to access the phase menu list.
Display
Command Function
Set immediate output phase
Set triggered output phase
PHASE <value>
PHASE:T <value>
PHASE:M <char>
Select the phase mode (FIXED, STEP, PULSE or LIST)
Shape
Press this key to access the shape menu list.
Display
SHAPE <char>
Command Function
Select the immediate output wave shape (SINE,
SQUARE, or CSINE) CSIN = clipped sine wave
Select the triggered output wave shape (SINE, SQUARE,
or CSINE) CSIN = clipped sine wave
SHAPE:T <char>
SHAPE:M <char>
CLIP <value>
Select the shape mode (FIXED, STEP, PULSE or LIST)
Set the clipping level of the CSIN wave shape. This
specifies the point where clipping starts as a percentage of
the peak amplitude or percentage of THD.
Pulse
Press this key to access the pulse menu list.
Display
Command Function
Set the pulse width
Set the number of output pulses
Set the pulse duty cycle as a percentage of the pulse period
Set the pulse period
WIDTH <value>
COUNT <value>
DCYCLE <value>
PER <value>
HOLD <char>
Set the parameter that will be held constant as the other
parameters change (WIDTH or DCYCLE)
Shift
Output
Press this key to access the output menu list.
Display
OUTP:COUP <char>
Command Function
Select output coupling (AC or DC)
*RST
Execute *RST command to place the ac source in the
factory-default state
TTLT:SOUR <char>
Select Trigger Out source coupling (BOT, EOT or LIST)
BOT = beginning of trensient
EOT = end of transient
LIST = TTLT trigger (see Programming Guide)
TTLT:STATE <value>
IMP:STATE <value>
IMP:REAL <value>
IMP:REAC <value>
PON:STATE <char>
RI <char>
Set Trigger Out state (ON or OFF)
Set output impedance programming (ON or OFF)
Set real part of output impedance
Set reactive part of output impedance
Select power-on state command (RST or RCL0)
Sets remote inhibit mode (LATCHING, LIVE, or OFF)
Sets discrete fault indicator state (ON or OFF)
Select the DFI source (QUES, OPER, ESB, RQS, or OFF)
(see Chapter 4 of Programming Guide)
DFI <char>
DFI:SOUR <char>
Notes:
value = a numeric value
char = a character string parameter
and
and
scroll through the command list.
scroll through the parameter list.
43
Download from Www.Somanuals.com. All Manuals Search And Download.
4 - Front Panel Operation
Protection and Status Control Keys
The Protect and Status keys control the protection functions and status registers of the ac source. Refer to
Chapter 4 of the Programming guide for more information on the status registers.
Protect
Press this key to access the protection menu list.
Display
PROT:CLEAR
Command Function
Clear the status registers of all activated protection signals.
The fault causing a signal must be corrected or removed
before the register can be cleared.
CURR:PROT <char>
VOLT:PROT <value>
DELAY <value>
Set overcurrent protection function (ON or OFF).
Set the overvoltage protection level1
Set the time delay for activating a protection fault after
programming the output
Shift
Status
Press this key to access the status menu list. Note that in the following list, commands
ending in ? clear the registers when they are read. For this reason the registers are read
Enter
only after you press
, not when you scroll to the command
Display
*CLS
STATUS:PRESET
*ESR? <value>
*STB <value>
Command Function
Executes the clear status (*CLS) command
Execute the STATus:PRESet command
Return Event Status register value
Return Status Byte register value
OPER:EVEN? <value> Return STAT:OPER:EVENT? value
OPER:COND <value> Return STAT:OPER:COND? value
QUES:EVEN? <value> Return STAT:QUES:EVENT? value
QUES:COND <value>
Return STAT:QUES:COND? value
Notes:
1Programmed in peak volts. (Other voltage parameters are programmed in rms volts)
value = a numeric value
char = a character string parameter
and
and
scroll through the command list.
scroll through the parameter list.
44
Download from Www.Somanuals.com. All Manuals Search And Download.
Front Panel Operation - 4
Trigger and List Control Keys
The Trigger Control key controls output transient triggers. The List key controls the generation of output
lists. A list can contain up to 100 points, each of which can specify an output change (or transient). Refer
to Chapter 4 of the Programming Guide for more information about programming triggers and lists.
Trigger
Control
Press this key to access the trigger control menu list.
Display
INIT:IMMED
INIT:CONT <char>
TRIG:SOUR <char>
Command Function
Initiate the transient trigger sequence immediately.
Set continuous trigger initiation (ON or OFF).
Select transient trigger source (BUS, EXT, TTLT or
IMM).
DELAY <value>
ABORT
Set trigger delay in seconds.
Abort all trigger sequences.
SYNC:SOUR <char>
SYNC:PHASE <value>
Select trigger sync source (PHASE or IMM).
Set synchronous phase reference angle in degrees.
Shift
List
Press this key to access the list commands
Display
COUNT <value>
Command Function
Specifies the number of times a list repeats.
List of output dwell times.
DWEL:<index> <value>
FREQ:<index> <value>
FSLW:<index> <value>
IPK:<index> <value>
OFFS:<index> <value>
OSLW:<index> <value>
List of output frequencies.
List of output frequency slew rates
List of output peak current limits.
List of dc output voltages.
Dc offset voltage slew rate list
PHASE:<index> <value> List of output voltage phase angles.
SHAP:<index> <char>
List of output waveform shapes.1
(SINE, SQUARE or CSIN) CSIN = clipped sine wave
Response of list to triggers (ONCE or AUTO).
List of Trigger Out pulses (0=no pulse; 1=pulse).
List of ac output voltages.
STEP<char>
TTLT:<index> <value>
VOLT:<index> <value>
VSLW:<index> <value>
List of output voltage slew rates.
Notes:
1User-defined waveshapes will also appear in this list when created.
value = a numeric value
char = a character string parameter
index = a numeric value that represents a list point from 0 to 99
and
and
scroll through the command list.
scroll through the parameter list.
Index
Index
and
scroll through the desired list points. EOL is displayed when the
automatically
truncates or clears the list at the
end of the list is reached. When a value is edited, pressing
advances to the next list point. Pressing
presently displayed list point.
Enter
Clear Entry
45
Download from Www.Somanuals.com. All Manuals Search And Download.
4 - Front Panel Operation
Entry Keys
Refer to the examples later in this chapter for more details on the use of these keys.
ENTRY
Calibration
7
4
8
9
6
5
2
Enter
1
3
E
Clear Entry
-
.
0
Figure 4-4. Entry Keys
These keys let you scroll through choices in a parameter list that apply to a
specific command. Parameter lists are circular; you can return to the starting
position by continuously pressing either key. If the command has a numeric
range, these keys increment or decrement the existing value.
0
.
9
0
9
.
through
are used for entering numeric values.
is the decimal
−
point. For example, to enter 33.6 press: 3 3 . 6 Enter.
-
The backspace key deletes the last digit entered from the keypad. This key lets
you correct one or more wrong digits before they are entered.
Enter
This key executes the entered value or parameter of the presently accessed
command. Until you press this key, the parameters you enter with the other
Entry keys are displayed but not entered into the ac source. Before pressing
Enter
you can change or abort anything previously entered into the display.
After Enter is pressed, the ac source returns to Meter mode in most cases. In
Harmonic or List mode, the ac sourse displays the next point in the list.
E
Shift
This key specifies an exponential power of 10. For example, the the value for
100µs can be entered as either . 0 0 0 1 , or as 1 E − 4
−
Shift
Shift
This key − is the minus sign.
This key aborts a keypad entry by clearing the value. This key is convenient for
correcting a wrong value or aborting a value entry. The display then returns to
Clear Entry
Clear Entry
the previously set function. When editing a list, pressing
truncates
or clears the list at the presently displayed list point.
Shift
This key accesses the calibration menu (Refer to Appendix B to calibrate your
ac source).
Calibration
46
Download from Www.Somanuals.com. All Manuals Search And Download.
Front Panel Operation - 4
Examples of Front Panel Programming
You will find these examples on the following pages:
1
2
Setting the output voltage amplitude
Setting the output frequency
3
Setting the dc offset
4
Setting a protection feature
5
Clearing a protection feature
6
7
8
Generating step, pulse, and list transients
Programming trigger delays and phase synchronization
Programming slew rates
9
Measuring peak inrush current
10
11
Setting the GPIB address or RS-232 parameters
Saving and recalling operating states
The examples in the ac source Programming Guide are similar to the ones in this section, except that they
use SCPI commands.
1 - Setting the Output Voltage Amplitude
NOTE:
The maximum voltage that the ac source can output is limited by the peak value of the
waveform, which is 425 Vpeak. Since the output is programmed in units of rms volts, the
maximum value that can be programmed is dependent on the peak-to-rms ratio of the
selected waveform. For a sinewave, the maximum ac voltage that can be programmed is
300 Vrms. For other waveforms the maximum may be different.
When you turn on the ac source, the default output shape is a 60 Hz sinewave at 0 Vrms. There is no
output from the ac source because the default output state is OFF, as indicated by the Dis annunciator.
Set the output to 120 V rms as follows:
Action
Display
You can set the voltage in any of three ways:
1.
VOLT 120
VOLT 127
On the Function keypad, press Voltage. On the Entry keypad, press 1 2 0 Enter.
This is the easiest way to enter an accurate value.
2.
On the Function keypad, press Voltage. On the Entry keypad, press ¯ or ° to
increment or decrement the existing value. This technique is useful when you are
making minor changes to an existing value.
3
Rotate the front panel Voltage knob to obtain 120 V. This method is best when you
120 V 60 Hz
want to enter a value without using the voltage menu.
Note: You will not see the new voltage on the front panel meter unless the output is
enabled.
To enable the output:
4.
120 V 60 Hz
On the Function keypad, press Output On/Off. The Dis annunciator will go off,
indicating that the voltage is now applied to the output terminals.
47
Download from Www.Somanuals.com. All Manuals Search And Download.
4 - Front Panel Operation
2 - Setting the Output Frequency
When you turn on the ac source, the default output frequency is a 60 Hz. Assuming the voltage output
from example 1 is in effect (120 Vrms sinewave), change the frequency to 50 Hz as follows:
Action
Display
You can set the frequency in the same way that you set the voltage:
1.
2.
FREQ 50
FREQ 50
On the Function keypad, press Freq. On the Entry keypad, press 5 0 Enter.
On the Function keypad, press Freq. On the Entry keypad, press ¯ or ° to
increment or decrement the existing value.
3.
Rotate the front panel Frequency knob to obtain 50 Hz.
FREQ 50
To verify the output, use the meter menu:
4.
The Meter menu is presently displaying the measured voltage and frequency of the
selected output phase. Press and ô to scroll through all of the measurement
functions in the Meter Menu.
120 V 50 Hz
3 - Setting the DC Offset
NOTE:
Because the maximum voltage that the ac source can output is limited to 425 Vpeak, you
cannot program a dc offset that will cause a previously programmed ac voltage to exceed
the 425 Vpeak limit (acpeak + offset ≤ 425 V).
The dc output capability of the ac source lets you independently control the dc and ac components of the
output voltage. Program a dc offset of 100 V as follows:
Action
Display
OFFSET
1.
0
On the Function keypad, press Voltage and then press ô until you access the
OFFSET command.
2.
3.
OFFSET 100
On the Entry keypad, press 1 0 0 Enter.
OUTP:COUP AC
On the Function keypad, press Shift Output to access the output coupling command.
Note: When the output coupling is set to ac, the ac source regulates the dc output
voltage to 0, regardless of any programmed voltage offset.
4.
5.
OUTP:COUP DC
156 V 50 Hz
Press ° and Enter to change the output coupling to DC.
The ac source output now combines the previously programmed ac rms voltage and
the dc offset voltage. This is indicated by the OUTPUT AC+DC annunciator. The
front panel meter is measuring a 120 Vrms sinewave offset by 100 Vdc. This is
indicated by the METER AC+DC annunciator.
To measure just the ac or just the dc portion of the output:
INP:COUP ACDC
6.
7.
On the Function keypad, press Input to access the metering functions.
INP:COUP
DC
Press ° until you access the DC parameter and press Enter. This changes the
metering function to dc, which measures just the dc portion of the output in volts.
The meter annunciator indicates METER AC
100 V 50 Hz
INP:COUP
120 V 50 Hz
AC
Press Input again. Press ° until you access AC and press Enter. This changes the
metering function to ac, which measures just the ac portion of the output in rms volts.
The meter annunciator indicates METER DC
8.
48
Download from Www.Somanuals.com. All Manuals Search And Download.
Front Panel Operation - 4
4 - Setting a Protection Feature
You can set the ac source to disable its output if it detects an overvoltage or overcurrent fault condition.
Other automatic fault conditions (such as overtemperature) also will disable the output. Set the
overcurrent protection feature as follows:
Action
Display
PROT:CLEAR
On the Function keypad, press Protect.
1.
2.
3.
Press ° to obtain the overcurrent command.
CURR:PROT OFF
CURR:PROT ON
On the Entry keypad, press once to scroll to the ON parameter and press Enter. The
OCP annunciator will light, indicating that the overcurrent protection circuit is on.
CURR:PROT ON
DELAY .1
If you wish to set a time delay between the detection of the fault and the disabling of
the output, scroll to the delay command on the protection menu. The default delay is
100 milliseconds.
DELAY .250
PROT:CLEAR
Enter the delay from the Entry keypad, such as . 2 5 0 Enter.
4.
When you want to restore normal operation after the cause of the overcurrent
condition has been removed, scroll to the protection clear command and press
Enter. The OCP annunciator then will go off.
5 - Clearing Protection Conditions
When the output Prot annunciator is on, the output of the ac source has turned off due to one or more of
the following conditions:
Annunciator
Description
Bit Number Bit Weight
OV
OCP
SOA
OT
RI
Rail
overvoltage protection has tripped
rms overcurrent protection has tripped
safe operating area has tripped
overtemperature protection has tripped
an external remote inhibit signal has occurred
rail protection has tripped
0
1
2
4
9
1
2
4
16
512
2048
11
Action
Display
1.
You must first identify the cause of the protection shutdown, and then eliminate its
cause before you can continue operating the unit.
2.
3.
4.
*CLS
To identify the problem, press Shift Status.
Press ô to obtain the Questionable Event command.
Press Enter to find out which bits have been set in the Event Register.
QUES:EVEN?
QUES:EVEN 20
Note: The value returned is the sum of all of the binary weights of the bits that have
been set. For example, a value of 20 indicates that bit 2 (bit weight=4) and bit 4 (bit
weight=16) have been set. Refer to the previous table for the bits and bit weights that
are assigned to the protection conditions. Refer to the following table for information
on eliminating the couse of the protection condition. Refer to Chapter 4 in the ac
source Programming Guide for a complete discussion of the status system.
49
Download from Www.Somanuals.com. All Manuals Search And Download.
4 - Front Panel Operation
Condition
Action
OV Condition
Usually overvoltage conditions are caused by an external source forcing voltage into the output
of the ac source. Remove this external source to eliminate the overvoltage. You can also
program the overvoltage level to a higher value, or turn the overvoltage protection off.
In other cases the output voltage may have exceeded the user-programmed overvoltage level. In
this case the unit may have inadvertently been programmed to a voltage that exceeded the
programmed overvoltage level. The VOLTage:PROTection command sets the overvoltage
protection level.
Note: The overvoltage protection level is programmed in peak, not rms volts.
OCP Condition
SOA Condition
If the CURRent:PROTection:STATe command has been programmed to to disable the output
when rms current limit is activated, the unit will shut down. The rms current limit threshold is
set by the CURRent command. In this case you must check to see why the load is drawing more
current than the limit that has been programmed by the CURRent command.
Protection circuits in the ac source let the load draw peak currents for short periods of time that
exceed the continuous capability of the unit. This allows loads that require large inrush currents
to turn on. The ac source will shut down if a combination of peak current duration and internal
component temperature exceeds a predetermined limit.
When this occurs, it means that the load has been drawing peak output currents that are beyond
the capability of the ac source to supply for extended periods. Slower output slew rates and
reduced peak current limit settings can be used to control the conditions that cause SOA
shutdowns.
OT Condition
RI Condition
When the internal operating temperatures of the ac source exceed predetermined thresholds, the
output turns off. If this happens, you must let the unit cool down before continuing operation.
If the Remote Inhibit input has been programmed to to disable the output when it receives an
external signal, the unit will shut down. The Remote Inhibit input is set by the
OUTPut:RI:MODE command. In this case you must check to what external event produced a
signal on the RI input.
Rail Condition
The internal high voltage rail that provides power for the ac source’s output is continuously
monitored for proper voltage level. If this voltage is not maintained within predetermined levels,
the output will shut down. This can happen if an extenal source forces too much power into the
ac source or if too much power is drawn from the ac source.
Remove the external source to eliminate the rail condition. Slower output slew rates and reduced
peak current limit settings can also be used to control the conditions that cause rail shutdowns.
6 - Using Transient Voltage Modes
The ac source voltage can be programmed in the following transient operating modes:
STEP
PULSE
causes the output to permanently change to its triggered value.
causes the output to change to its triggered value for a specific time, as determined by the
Pulse menu parameters.
LIST
causes the output to sequence through a number of values, as determined by points entered
in the List menu.
FIXED
disables transient operation for the selected function.
50
Download from Www.Somanuals.com. All Manuals Search And Download.
Front Panel Operation - 4
Step Transient
The Voltage Menu lets you specify an alternate or triggered voltage level that the ac source will apply to
the output when it receives a trigger. Because the default transient voltage level is zero volts, you must
first enter a triggered voltage before you can trigger the ac source to change the output amplitude. Refer
to Chapter 4 of the Programming Guide for more information about programming triggers.
In the following example, the voltage output is set to 120 Vrms and then stepped down to 102 Vrms.
Action
Display
1.
0 V 60 Hz
On the Function keypad, press Output On/Off to enable the output. The Dis
annunciator will go off.
2.
3.
VOLT 120
VOLT:T 0
Press Voltage to access the Voltage Menu. On the Entry keypad, press 1 2 0 Enter.
Access the Voltage Menu again and press ô to access the triggered voltage
command.
4.
5.
VOLT:T 102
On the Entry kepad, press 1 0 2 Enter.
Access the Voltage Menu again and press ô to access the voltage mode command. It
should be in the default FIXED mode. An ac source function in the FIXED mode
does not respond to triggers. On the Entry keypad, press ¯ or ° to scroll through the
mode parameters. When you have STEP, press Enter.
VOLT:M STEP
6.
7.
INIT:IMMED
102 V 60 HZ
Press Trigger Control and Enter. This initiates (or enables) one immediate trigger
action.
Press Shift Trigger. This sends the ac source an immediate trigger signal to change
the output voltage. The triggered voltage value now becomes the VOLT value.
Pulse Transient
In the following example, the output is four 83.3-millisecond, 120 Vrms pulses at 60 Hz. The figure
shows the trigger, pulse count, pulse period, and duty cycle.
NOTE:
From the Output Menu, execute the *RST command to reset the ac source. This is
necessary because any previously programmed functions remain in effect until cleared.
Trigger
count = 4
120Vrms
102Vrms
83.3ms
250ms
Figure 4-5. Pulse Transients
51
Download from Www.Somanuals.com. All Manuals Search And Download.
4 - Front Panel Operation
Action
Display
1.
2.
VOLT 102
VOLT 120
Press Voltage to access the Voltage Menu. On the Entry keypad, press 1 0 2 Enter.
Press ô to access the triggered voltage command. On the Entry keypad, press 1 2 0
Enter.
3.
Access the Voltage Menu again and press ô to access the voltage mode command. On
the Entry keypad, press ¯ or ° to scroll through the mode parameters to obtain
PULSE and press Enter.
VOLT:M PULSE
4.
5.
6.
WIDTH .0833
DCYCLE 33
Press Pulse to access the Pulse Menu. From the Entry keypad, press
. 0 8 3 3 Enter to enter a pulse width of 83.3 milliseconds.
Access the Pulse Menu and press ô to access the duty cycle command. From the Entry
keypad, press 3 3 Enter to change the duty cycle to 33%.
Access the Pulse Menu and press ô to access the pulse count. On the Entry keypad,
press 4 and Enter.
COUNT
4
7.
8.
INIT:IMMED
102 V 60 HZ
Press Trigger Control and Enter to initiate the transient trigger sequence.
Press Shift Trigger. This sends the ac source an immediate trigger signal to generate
the four output pulses.
Note: The ac source output returns to 102 V at the completion of the output pulses.
List Transient
Lists are the most flexible means of generating multiple or synchronized transient outputs. The following
figure shows a voltage output generated from a list. The output shown represents three different ac
voltage pulses (160 volts for 33 milliseconds, 120 volts for 83 milliseconds, and 80 volts for 150
milliseconds) separated by 67-millisecond, 0-volt intervals.
The list specifies the pulses as three voltage points (point 0, 2, and 4), each with its corresponding dwell
point. The intervals are three zero-voltage points (point 1, 3, and 5) of equal intervals. The count
parameter causes the list to execute twice when started by a single trigger.
NOTE:
From the Output Menu, execute the *RST command to reset the ac source. This is
necessary because any previously programmed functions remain in effect until cleared.
Trigger
160 Vrms
0
1
3
4
5
2
List Count = 1
List Count = 2
Figure 4-6. List Transients
52
Download from Www.Somanuals.com. All Manuals Search And Download.
Front Panel Operation - 4
Action
Display
1.
2.
3.
4.
VOLT:M FIXED
Press Voltage to access the Voltage Menu. Then press ô to access the voltage mode
command.
On the Entry keypad, press ¯ or ° to scroll through the mode parameters to obtain LIST
and press Enter.
VOLT:M LIST
COUNT
2
Access the List Menu by pressing Shift List. The first menu command is the count. From
the Entry keypad, change the list count from the default (1) to 2. Press Enter.
Access the List menu again and press ô until you access the dwell time. This specifies
the "on" time for each voltage point, which is effectively the output pulse width. The first
dwell point (0) appears in the display. On the Entry keypad, press . 0 3 3 and Enter.
DWEL 0 .033
5.
Pressing the Enter key automatically advances to the step in the list. Enter the following
values for dwell list points 1 through 5: .067, .083, .067, .150, .067. Press Enter to
enter each value. When you finish, you will be at point 6, which is the end of the list.
DWEL 1 .067
DWEL 2 .083
DWEL 3 .067
DWEL 4 .150
DWEL 5 .067
DWEL 6 EOL
Note: Press Shift Index or Shift ôIndex to access and edit any list point.
6.
7.
Press ô until you access the voltage list. This specifies the amplitude of each output point
during its corresponding dwell period. The first voltage list point (0) appears in the
display. On the Entry keypad, press 1 6 0 and Enter.
VOLT 0 160
Pressing the Enter key automatically advances to the step in the list. Enter the following
values for voltage list points 1 through 5: 0, 120, 0, 80, 0. Press Enter to enter each
value. When you finish, you will be at point 6, which is the end of the list.
VOLT 1
0
VOLT 2 120
VOLT 3
VOLT 4
VOLT 5
0
80
0
Note: Press Shift Index or Shift ôIndex to access and edit any list point.
VOLT 6 EOL
8.
Press ô until you access the step command. Check that it is at the default mode (AUTO).
STEP AUTO
This lets a single trigger run your list for the specified count.
9.
0 V 60 Hz
INIT:IMMED
0 V 60 Hz
Press Output On/Off to enable the output. The Dis annunciator will go off.
Press Trigger Control and Enter to initiate the transient trigger sequence.
10.
11.
Press Shift Trigger. This sends the ac source an immediate trigger to generate the four
output pulses. The output returns to the immediate value at the end of the list.
Note: To clear a list, press Clear Entry. This truncates or clears the list at the presently
displayed list point. Each list must be accessed and cleared separately.
7 - Trigger Delays and Phase Synchronization
The ac source trigger system also lets you program trigger delays as well as synchronize output changes
to a specific phase angle of the output waveform.
In example j, the output transient is triggered immediately at the receipt of the trigger signal. In example
ô, a delay time of approximately 16.7 milliseconds elapses between the occurence of the trigger and the
start of the output transient. In example í, the trigger source is programmed for phase synchronization,
which means that the transient occurs at the first occurrence of the specified phase angle after the trigger
signal is received.
53
Download from Www.Somanuals.com. All Manuals Search And Download.
4 - Front Panel Operation
Note that phase synchronization is referenced to an internal phase signal. The output of the unit is
normally offset by 0° with respect to this internal reference. Because synchronized transient events
always occur with respect to the internal reference, the output will normally be in phase with the value
programmed for phase synchronization. (The Phase command can be used to change the offset of the
output with respect to the internal phase reference.)
Trigger
VOLT T level
1
VOLT level
VOLT T level
VOLT level
2
0.000
0.0167
VOLT T level
VOLT level
3
0
90
Figure 4-7. Trigger Delays and Phase Synchronization
Example
Display
VOLT 120
VOLT:T 150
VOLT:M STEP
INIT:IMMED
VOLT 120
j
This example uses the default trigger parameters. First, access the Voltage
menu and program the immediate and triggered voltage levels, followed by
the voltage transient mode.
Then press Trigger Control and Enter, followed by Shift Trigger.
In this example, you will set a trigger delay. First, access the Voltage menu
and program the immediate and triggered voltage levels, followed by the
voltage transient mode.
ô
VOLT:T
150
VOLT:M STEP
DELAY 0
DELAY .0167
Press Trigger Control. Then press ô until you access the delay parameter.
On the Entry keypad, press . 0 1 6 7 Enter.
INIT:IMMED
Then press Trigger Control and Enter, followed by Shift Trigger.
This example uses the phase sync mode with no delay, but synchronized at 90.
First, access the Voltage menu and program the immediate and triggered
voltage levels, followed by the voltage transient mode.
VOLT 120
VOLT:T 150
VOLT:M STEP
í
DELAY 0
SYNC:SOUR PHASE
Press Trigger Control. Press ô until you access the delay parameter. If
necessary, set it to 0. Press ô until you access the sync source command. On
the Entry keypad, press ° to obtain PHASE. Press Enter.
SYNC:PHAS 90
INIT:IMMED
Access the Trigger Control menu again and press ô to access the sync phase
reference parameter. On the Entry keypad, program a 90° phase reference by
entering 9 0 Enter.
Then press Trigger Control and Enter, followed by Shift Trigger.
54
Download from Www.Somanuals.com. All Manuals Search And Download.
Front Panel Operation - 4
8 - Using Slew Rates to Generate Waveforms
As shown in the previous examples there are a number of ways that you can generate custom waveforms.
Programmable slew rates provide additional flexibility when customizing waveforms. The following
figure illustrates how programmable slew rates are applied in the transient operating modes.
In example , an immediate slew rate of 50 volts/second is used whenever a new output voltage is
programmed. In example ô, a triggered slew rate of 50 volts/second steps the voltage level to its new
value. 50 volts/second becomes the new immediate slew rate in step mode. In example í, a triggered
slew rate of 50 volts/second is used at the start of the pulse. The immediate slew rate of infinity applies at
the trailing edge of the pulse. In example ÷, the slew rates are set by the values in the voltage slew list.
New VOLT level
SLEW rate
1 SLEW:MODE FIXED
VOLT:T level
SLEW:T rate
2 SLEW:MODE STEP
SLEW rate
SLEW rate
VOLT:T level
SLEW:T rate
width
SLEW:T
3 SLEW:MODE PULSE
rate
SLEW [2]
SLEW rate
VOLT level
SLEW [0]
SLEW [1]
4 SLEW:MODE LIST
SLEW [3]
TRIGGER
APPLIED
LIST
COMPLETE
Figure 4-8. Programming Slew Rates
55
Download from Www.Somanuals.com. All Manuals Search And Download.
4 - Front Panel Operation
Example
Display
j
This example uses the immediate slew rate. First, access the Voltage menu
and press ô until you access the mode command. On the Entry keypad, press
° to obtain FIXED. Press Enter.
VOLT:M FIXED
SLEW 50
Access the voltage menu and press ô until you access the slew command. On
the Entry keypad, press 5 0 Enter to program a slew rate of 50 volts/second.
Whenever a new immediate voltage value is entered, the output will slew to
the new level at 50 volts/second.
Step mode uses the triggered slew rate. First, access the Voltage menu,
program the immediate and triggered voltage levels, and set the slew mode to
STEP.
VOLT 120
ô
VOLT:T
150
SLEW:M STEP
Access the Voltage menu and press ô to access the immediate slew
SLEW: 9.9+E37
command. On the Entry keypad, enter a value that equals infinity.
Access the Voltage menu and press ô until you access the triggered slew
command. On the Entry keypad, enter a value such as 5 0 Enter, which sets
the triggered slew rate to 50 volts/second.
SLEW:T 50
INIT:IMMED
Then press Trigger Control and Enter, followed by Shift Trigger.
After the trigger has been sent, in step mode, the triggered value becomes the
new immediate value.
Pulse mode uses the triggered slew rate at the leading edge of the pulse, and
the immediate slew rate at the trailing edge of the pulse. First, access the
Voltage menu, program the immediate and triggered voltage levels, and set
the slew mode to PULSE.
VOLT 120
í
VOLT:T
150
SLEW:M PULSE
Access the Pulse menu and program the pulse count, duty cycle, and pulse
period.
COUNT
DCYCLE 33
PER .0166
2
Access the Voltage menu and press ô to access the immediate slew
SLEW: 9.9+E37
command. On the Entry keypad, enter a value that equals infinity.
Access the Voltage menu and press ô until you access the triggered slew
command. On the Entry keypad, enter a value such as 5 0 Enter, which sets
the triggered slew rate to 50 volts/second.
SLEW:T 50
INIT:IMMED
Then press Trigger Control and Enter, followed by Shift Trigger.
When the voltage slew mode is set to LIST, the slew rates are set by the
values in the voltage slew list. Refer to the List Transient example for more
information on how to program lists. You must program the voltage values
and dwell times as explaied in that example. You must also program a slew
rate for each point in the list (even if it is 9.9+E37).
÷
NOTE:
When specifying a dwell time, you must take the slew time into consideration. If the
dwell time at any given list point is less than the slew time at the same point, the voltage
will never reach its programmed level before the next list point becomes active.
56
Download from Www.Somanuals.com. All Manuals Search And Download.
Front Panel Operation - 4
9 - Measuring Peak Inrush Current
Peak inrush current is a non-repetitive measurement in the sense that peak inrush current occurs only
when the unit under test is first turned on. In order to repeat the measurement, you must turn the unit off
and wait for any input filter capacitors to discharge completely.
This example shows you how you can measure the peak inrush current using the front panel meter. The
voltage is set to 120 V rms and the output is triggered at an output phase of 75°, which optimizes the
conditions under which inrush current is applied to the unit under test.
Action
Display
1.
2.
VOLT
0
Set the immediate voltage to 0. Press Voltage, then press 0 and Enter.
Set the triggered voltage to 120 V rms. In the Voltage menu, press ô to
access the triggered voltage command. Then press 1 2 0 Enter.
VOLT:T 120
3.
4.
Set the voltage mode to step. In the Voltage menu, press ô to access the
mode command. Press ° to scroll to STEP and press Enter.
VOLT:M STEP
Make sure the triggered voltage slew rate is set to the fastest possible speed.
In the Voltage menu, access the triggered slew command. If necessary, reset
the slew rate to a faster speed.
SLEW:T 9.9000+E37
5.
Make sure the peak current and rms current limits are set to high values. In the
Current menu, access the rms current limit and then the peak current limit
commands. If necessary, reset the rms current and the peak current limits to
higher values.
CURR:LEV 6.5
CURR:PEAK 40
(Agilent 6811B units have an rms current limit of 3.25 A. Agilent 6813B units
have an rms current limit of 13 A and a peak current limit of 80 A)
6.
Synchronize the trigger source with a reference phase angle. In the Trigger
Control menu, press ô to access the sync source command. Press ° to obtain
PHASE and press Enter.
SYNC:SOUR PHASE
7.
8.
9.
SYNC:PHAS 75
INIT:IMMED
0 A PK NR
Set the reference phase angle to 75°. In the Trigger Control menu, press ô to
access the sync phase command. Then press 7 5 Enter.
Initiate (or enable) the unit for one immediate trigger from the front panel.
Press Trigger Control and Enter.
Set the meter function to measure nonrepetitive peak inrush current. In the
Meter menu, press ô to access the peak inrush current display.
10. Enable the output by pressing Output On/Off.
0 V 60 HZ
11.
48 A PK NR
Send the trigger to step the output from 0 V to 120 V. Press Shift Trigger.
The inrush current is displayed on the Meter.
NOTE:
With fast and/or large voltage transitions, the CC annunciator may turn on due to current
in the output capacitor. This is normal and will limit the rate of change of output voltage.
To prevent the CC operating mode from limiting the rate of change of output voltage,
program the peak current limit to a higher value.
57
Download from Www.Somanuals.com. All Manuals Search And Download.
4 - Front Panel Operation
10 - Setting the GPIB Address and RS-232 Parameters
Your ac source is shipped with the GPIB address set to 5 This address can only be changed from the front
panel using the Address menu located under the Address key. This menu is also used to select the RS-
232 interface and specify RS-232 parameters such baud rate and parity.
Action
Display
To set the GPIB address, proceed as follows:
1.
2.
ADDRESS 5
ADDRESS 7
On the System keypad, press Address.
Enter the new address. For example, Press 7, Enter.
To configure the RS-232 interface, proceed as follows:
1.
2.
ADDRESS 5
On the System keypad, press Address.
Scroll through the Address menu by pressing ô . The interface command
lets you select the RS-232 interface. The baudrate command lets you
select the baudrate. The parity command lets you select the parity.
INTF RS232
BAUDRATE 600
PARITY EVEN
3.
The ¯ and ° keys let you select the command parameters.
11 - Saving and Recalling Operating States
You can save up to 16 states (from location 0 to location 15) in non-volatile memory and recall them
from the front panel. All programmable settings are saved. List data, however, cannot be saved in state
storage. Only one list is saved in non-volatile memory.
Action
Display
To save an operating state in location 1, proceed as follows:
1.
2.
Set the instrument to the operating state that you want to save.
*SAV 1
*RCL 1
Save this state to location 1. Press Shift Save 1 Enter.
To recall a saved state in location 1, proceed as follows:
1.
To select the power-on state of the ac source, proceed as follows:
Recall the state saved in location 1 by pressing Recall 1 Enter
1.
PON:STATE RST
On the Function keypad, press Shift Output, and scroll through the Output
menu until you get to the PON state command.
2.
Use the ¯ and ° keys to select either RST or RCL0. RST sets the power-on
state of the unit as defined by the *RST command. RCL0 sets the power-on
state of the unit to the state saved in *RCL location 0.
To clear the non-volatile memory of the ac source, proceed as follows:
1.
*RST
On the Function keypad, press Shift Output and scroll to the *RST com-
mand. Then press Enter. This returns the unit to the factory-default settings.
2.
3.
*SAV 1
Save these settings to location 1. Press Shift Save 1 Enter.
Repeat step #2 for memory locations 2 through 16..
*SAV 2
*SAV 3
*SAV 4
.
.
...*SAV 16
58
Download from Www.Somanuals.com. All Manuals Search And Download.
A
Specifications
Specifications
Table A-1 lists the specifications of the ac source. Performance specifications are warranted over the
o
ambient temperature range of 0 to 40 C. Unless otherwise noted, specifications are for a sinewave with
a resistive load at an output frequency range of 45 Hz to 1 kHz, in ac-coupled mode after a 30-minute
warmup. Refer to table A-3 for ac source operation with output frequencies from dc to 45 Hz.
1
Table A-1. Performance Specifications
Parameter
Agilent 6811B
Agilent 6812B
1
Agilent 6813B
1
1
Phases:
375 VA
285 W
300 V
± 425 V
3.25 A
2.5 A
750 VA
575 W
300 V
± 425 V
6.5 A
5 A
40 A
40 A
1750 VA
1350 W
300 V
± 425 V
13 A
10 A
80 A
80 A
Maximum Output Ratings
Power (VA):
dc Power (Watts):
rms Voltage:
dc Voltage:
rms Current (in real-time mode):
dc Current:
2
40 A
40 A
Repetitive peak Current :
2
Non-repetitive peak Current
(inrush):
Crest Factor (current):
2
12
6
6
3
Output Frequency Range :
dc; 45 Hz−1 kHz
Constant Voltage Ripple
and Noise
rms relative to full scale:
rms:
−60 dB
300 mV
(20 kHz−10 MHz):
Regulation:
0.5% of full scale
0.1% of full scale
Load (rms detection mode):
Line:
0.25% at 50 Hz/60 Hz
1% worst-case 45 Hz−1 kHz
Maximum Total Harmonic
Distortion:
Load Power Factor
Capability:
0−1
100 mV
Maximum Fixed dc Offset
Voltage (ac coupled):
Programming Accuracy
0.15% + 0.3 V
0.5% + 0.3 V
1% + 0.3 V)
rms Voltage
rms Voltage
(45−100 Hz):
(>100−500 Hz):
(>500 Hz−1 kHz):
Frequency:
dc Voltage:
(45−100 Hz):
(>100−500 Hz):
(>500 Hz−1 kHz):
Frequency:
o
(rms detection mode @ 25 C
o
±5 C), ±(% of output+offset)
0.01% + 10 µHz
0.1% + 0.5 V
0.03% + 100 mV
0.1% + 100 mV
0.2% + 100 mV
0.1% + 0.5 V
0.5% + 0.3 V
Measurement Accuracy
o
o
(@25 C ±5 C), ± (% of
output + offset)
0.01% + 0.01 Hz
0.03% + 150 mV
dc Voltage:
59
Download from Www.Somanuals.com. All Manuals Search And Download.
A - Specifications
Table A-1. Performance Specifications (continued)
Parameter
Measurement Accuracy
(continued)
Agilent 6811B/6812B/6813B
rms Current High Range
(45−100 Hz):
0.05% + 10 mA
0.05% + 15 mA
0.05% + 30 mA
(>100−500 Hz):
(>500 Hz−1 kHz):
rms Current Low Range
(45−100 Hz):
0.05% + 1.5 mA
0.05% + 8 mA
0.05% + 25 mA
(>100−500 Hz):
(>500 Hz−1 kHz):
repetitive pk current High Range
(45 Hz−1 kHz):
0.05% + 150 mA
0.03% + 150 mA
repetitive pk current Low Range
(45 Hz−1 kHz):
Power (VA) Low Range
0.1% + 1.5 VA + 1.2 mVA/V
0.1% + 2 VA + 1.2 mVA/V
0.1% + 6 VA + 1.2 mVA/V
(45−100 Hz):
(>100−500 Hz):
(>500 Hz-1 kHz):
Power (VA) High Range
0.1% + 1.5 VA + 12 mVA/V
0.1% + 2 VA + 12 mVA/V
0.1% + 6 VA + 12 mVA/V
(45−100 Hz):
(>100−500 Hz):
(>500 Hz−1 kHz):
Power (Watts) Low Range
(45−100 Hz):
0.1% + 0.3 W + 1.2 mW/V
0.1% + 1.2 W + 1.2 mW/V
0.1% + 2.5 W + 1.2 mW/V
(>100−500 Hz):
(>500 Hz−1 kHz):
Power (Watts) High Range
(45−100 Hz):
0.1% + 0.3 W + 12 mW/V
0.1% + 1.2 W + 12 mW/V
0.1% + 2.5 W + 12 mW/V
(>100−500 Hz):
(>500 Hz−1 kHz):
0.01
Power Factor:
0.03% + 100 mV + 0.2%/kHz
Harmonic Measurement
Accuracy
(50/60 Hz, @25 C ±5 C),
± (% of output + offset)
Voltage Magnitude:
o
o
Current Magnitude (Low Range)
Fundamental:
0.03% + 1.5 mA
0.03% + 1 mA + 0.2%/kHz
Harmonics 2−49:
Current Magnitude (High Range)
Fundamental:
0.05% + 5 mA
0.03% + 3 mA + 0.2%/kHz
Harmonics 2−49:
1
2
3
Specifications subject to change without notice.
These specifications are subject to the restrictions of Table 1-3.
Product may be operated between dc and 45 Hz subject to operating conditions described in Table A-3.
60
Download from Www.Somanuals.com. All Manuals Search And Download.
Specifications - A
Supplemental Characteristics
Table A-2 lists the supplemental characteristics, which are not warranted but are descriptions of typical
performance determined either by design or type testing.
Table A-2. Supplemental Characteristics
Parameter
Agilent 6811B
Agilent 6812B
Agilent 6813B
174−220 Vac
ac Input Voltage Range (Vac):
87−106 Vac (100 Vac nom.)
(200/208 Vac nom.)
191−254 Vac
(230 Vac nom.)
104−127 Vac (120 Vac nom.)
174−220 Vac (200/208 Vac nom.)
191−254 Vac (230 Vac nom.)
12 A (100 Vac),
10 A (120 Vac),
7.5 A (200/208 Vac),
6.5 A (230 Vac)
28 A (100 Vac),
24 A (120 Vac),
15 A (200/208 Vac),
13A (230 Vac)
20 A (230 Vac)
22 A (200/208 Vac)
Maximum Input Current (rms):
1000 VA/700 W
2500 VA/1400 W
3800 VA/2600 W
Maximum Input Power:
ac Input Frequency:
47−63 Hz
300 Vrms/425 Vdc
50 µs
Isolation to Ground:
Output Voltage Risetime:
(output change from 10 to 90% or 90 to 10% of its total
excursion with full resistive load)
Remote Inhibit Response Time:
Remote Sense Capability:
Programmable Output Impedance Ranges
Resistance:
15 ms
Up to 1 Vrms can be dropped across each load lead.
0−1 Ω
20 µH−1 mH
Inductance:
Average Programming Accuracy
rms Current:
1.2% of output + 50 mA
2% of output + 5 Vpeak
0.1 V/s
OVP:
ac Voltage Slew Rate (rms):
Frequency Slew Rate:
± 0.01%
Average Programming Resolution
rms Voltage:
125 mV
250 mV
6 mV/s
20 mV/s
0.05 Hz/s
2 Vpeak
4 mA
25 mA
10 µHz
dc Voltage:
ac Voltage Slew Rate (rms):
dc Voltage Slew Rate:
Frequency Slew Rate:
Overvoltage Programming(OVP):
rms Current:
peak Current:
Output Frequency:
Output Impedance
2 mA
12.5 mA
4 mA
25 mA
Resistive Component:
Inductive Component:
0.01 Ω
10 µH
Average Measurement Resolution
rms Voltage:
10 mV
2 mA
rms Current:
5% of reading + 0.1%
THD (for a fundamental amplitude ≥ 5% of full scale):
Measurement System
4096 points
≤ 50 µs
25−250 µs
12 bits
Measurement Buffer Length:
Measurement/Generation Synchronization:
Measurement Acquisition Sampling Rate Range:
Voltage/Current Digitization Accuracy:
Voltage/Current Digitization Resolution:
Harmonic Measurement Time(amplitude):
Meas:Curr:Harm? <n>
16 bts
400 ms
10 s
Meas:Array:Curr:Harm?
61
Download from Www.Somanuals.com. All Manuals Search And Download.
A - Specifications
Table A-2. Supplemental Characteristics (continued)
Parameter
Agilent 6811B
Agilent 6812B
Agilent 6813B
Transient System
Phase Synchronization:
± 100 µs
200 µs to 4.3 x 10 seconds
5
Pulse Width Range:
Pulse/Dwell Timing Accuracy:
Pulse Duty Cycle Range:
Pulse Count Range:
± 0.01%
0 to 100 %
1 to Infinity Pulses
1 to 100 steps
LIST Length:
Minimum LIST Dwell Time:
LIST Count Range:
200 µs
1 to Infinity LIST repeats
External Trigger Response Time:
200 µs
1 kHz
1024 points
Maximum External Trigger Rate:
Waveform Table Voltage Resolution:
RS-232 Interface Capabilities
Baud Rates:
300, 600, 1200, 2400, 4800, 9600
7 bits even or odd parity; 8 bits without parity
SCPI (Standard Commands for Programmable Instruments),
Elgar 9012 PIP
Data Format:
Language:
Trig In/Trig Out Characteristics
V
= 0.8 max. @ 1.25 mA
= 3.3 V max. @ 1.25 mA
Trig Out (HC TTL output):
V
oh
V
V
= 0.8 V max.
= 2 V max.
Trig In (10k pullup):
INH/FLT Characteristics
Maximum Ratings:
16.5 Vdc between INH terminals; FLT terminals; and from INH
terminals to chassis ground
I
= 1.25 mA max.
= 0.5 Vmax.
INH Terminals:
FLT Terminals:
V
V
= 0.8 V max.
= 2 V min.
ih
V
tw = 100 µs min.
td = 4 ms typical
Saveable Data (nonvolatile)
Instrument States:
User-defined waveforms
List data:
16 (0 to 15)
12 (with 1024 data points in each)
1 to 100 steps (for each list function)
GPIB Interface Capabilities
Language:
SCPI, Elgar 9012 PIP
AH1, C0, DC1, DT1, E2, LE1, PP0, RL1, SH1, SR1, TE6
Interface:
10 ms
1 year
Programming Time:
Recommended Calibration Interval:
Regulatory Compliance
Listed to:
UL 3111-1
CSA 22.2 No. 1010-1
IEC 1010
Certified to:
Conforms to:
CISPR-11, Group 1, Class A
RFI Suppression Complies with:
Dimensions
132.6 mm (5.25 in.)
425.5 mm (16.75 in.)
574.7 mm (22.6 in.)
Height (add 12.7 mm or 0.5 in. for feet)
Width:
Depth:
28.2 kg (62 lb)
31.8 kg (70 lb)
32.7 kg (72 lb)
36.4 kg (80 lb)
Net Weight:
Shipping Weight:
62
Download from Www.Somanuals.com. All Manuals Search And Download.
Specifications - A
Operation Below 45 Hz
The following operating characteristics apply for output frequencies between 45Hz and 1Hz. Below 1
Hz, instantaneous values meet the dc specifications. The ac source output is set to: sinewave, dc coupled,
real-time regulation, and is connected to a linear load.
Table A-3. Operation Below 45 Hz
Reactive power (VA)
Real Power (watts)
10 Hz
10 Hz
1750
750
1750
750
375
375
675
287
142
5 Hz
0
0
6
8
10
2
4
1
8
10
4
1
2
6
Frequency (linear scale)
Frequency (linear scale)
RMS current derating (A)
13
6.5
RMS current programming accuracy (% error)
45 Hz
10
3.75
7
3.5
1.75
5
5 Hz
2% error at 10 Hz
0
100
1
10
0
20
30
40
10
0
Frequency
Frequency
AC coupled frequency response (dB)
Meets Measurement Accuracy specifications under the following
conditions:
0
0.1%error @ 40Hz
1%error @ 10Hz
Minimum
measured
frequency
45 Hz
Maximum allowable
frequency component
to avoid aliasing
20 kHz
Sample rate
25 µs
30% error @ 2Hz (-3dB point)
50 µs
22.5 Hz
11.25 Hz
5.625 Hz
4.5 Hz
10 kHz
50 kHz
2.5 kHz
2 kHz
-10
-20
100 µs
200 µs
250 µs
slope of 1 (20dB/decade)
(Anti aliasing filters have a corner frequency of 12.5 kHz.)
1
10
100
.1
Frequency
63
Download from Www.Somanuals.com. All Manuals Search And Download.
Download from Www.Somanuals.com. All Manuals Search And Download.
B
Verification and Calibration
Introduction
This appendix includes verification and calibration procedures for the Agilent 6811B/6812B/6813B AC
Power Solutions. Instructions are given for performing the procedures either from the front panel or from
a controller over the GPIB.
The verification procedures do not check all the operating parameters, but verify that the ac source is
performing properly. Performance Tests, which check all the specifications of the ac source, are given in
the applicable ac source Service Manual.
Because the output of the ac source must be enabled during verification or calibration, proceed with
caution, since voltages and currents will be active at the output terminals.
Important
Perform the verification procedures before calibrating your ac source. If the ac source
passes the verification procedures, the unit is operating within its calibration limits and
does not need to be recalibrated.
WARNING: LETHAL VOLTAGES. Ac sources can supply 424 V peak at their output. DEATH
on contact may result if the output terminals or circuits connected to the output are
touched when power is applied. These procedures must be performed by a qualified
electronics technician or engineer trained on this equipment.
Equipment Required
The equipment listed in the following table, or the equivalent to this equipment, is required for
verification and calibration.
65
Download from Www.Somanuals.com. All Manuals Search And Download.
B - Verification and Calibration
Table B-1. Equipment Required
Equipment
Characteristics
Recommended Model
Agilent 3458A
Digital Voltmeter
Resolution: 10 nV @ 1 V
Readout: 8.5 digits
Accuracy: >20 ppm
Current Monitor1
Ratio Transformer2
Load Resistor
Guildline 7320/0.01
0.01 Ω, ±200 ppm, 10 Watts
30:1 ratio, 50 ppm, 45 Hz to 1 kHz
20 Ω, 10 A, 1800 Watts min.
1 Ω, 100 Watts min.
Impedance Resistor
GPIB Controller
Full GPIB capabilities
HP Series 200/300 or equivalent
1The 4- terminal current shunt is used to eliminate output current measurement error caused by voltage drops in the
load leads and connections. It has special current-monitoring terminals inside the load connection terminals. Connect
the voltmeter directly to these current-monitoring terminals.
2A ratio transformer is required only when verifying output voltage readback to MIL-STD-45662A 4:1 test
equipment ratio requirements.
Test Setup
Figure B-1 shows the setup for the tests. Be certain to use load leads of sufficient wire gauge to carry the
full output current (see Chapter 2).
Agilent 6811B/6812B/6813B
Agilent 3458A
SENSE
COM COM
01
01
DMM
S1
RL
Rs
Agilent 3458A
DMM
1
30
RL = Load resistor for CC test (20 ohms)
Rs = Current Monitor resistor ( 0.01 ohms )
Rz = Impedance resistor ( 1 ohm )
RZ
S1 = Switch is for convenience (not required).
Figure B-1. Verification & Calibration Test Setup
66
Download from Www.Somanuals.com. All Manuals Search And Download.
Verification and Calibration - B
Performing the Verification Tests
The following procedures assume you understand how to operate the ac source from the front panel as
explained in Chapter 4.
When performing the verification tests from a GPIB controller, you may have to consider the relatively
slow settling times and slew rates of the ac source as compared to computer and system voltmeters.
Suitable WAIT statements can be inserted into the test program to give the ac source time to respond to
the test commands.
Perform the following tests for operation verification in the order indicated.
1.
2.
3.
Turn-On Checkout
Voltage Programming and Measurement Accuracy
Current Measurement Accuracy
Turn-On Checkout Procedure
Perform the Turn-On Checkout as directed in Chapter 3.
NOTE:
The ac source must pass turn-on selftest before you can proceed with the verification
tests.
AC Voltage Programming and Measurement Accuracy
This test verifies the voltage programming, GPIB measurement, and front panel meter functions. Values
read back over the GPIB should be the same as those displayed on the front panel.
If more than one meter or if a meter and an oscilloscope are used, connect each to the sense terminals by
separate leads to avoid mutual coupling effects.
Action
Normal Result
1.
2.
Make sure the ac source is turned off. Connect the DVM and ratio
transformer as shown in the test setup in Figure B-1.
Turn on the ac source with no load. In the Output menu, execute
the *RST command to reset the unit. Enable the output by
pressing Output On/Off. Program the output voltage as follows:
CV annunciator on.
Output current near 0.
VOLT 300, FREQ 45, SHAPE:SIN, CURR 1
3.
Record voltage readings at the DVM1 and on the front panel
display.
Readings within specified High
range limits (300 V/45 Hz).
4.
5.
Program FREQ 400
Record voltage readings at the DVM1 and on the front panel
display.
Readings within specified High
range limits (300 V/400 Hz).
4.
7.
Program FREQ 1000, CURR:PEAK 40
Record voltage readings at the DVM1 and on the front panel
display.
Readings within specified High
range limits (300 V/1 kHz).
1Multiply the DVM reading by the transformer ratio if a ratio transformer is used.
67
Download from Www.Somanuals.com. All Manuals Search And Download.
B - Verification and Calibration
DC Voltage Programming and Measurement Accuracy
CAUTION:
Disconnect the ratio transformer for this test.
This test verifies the dc voltage programming, GPIB readback, and front panel meter functions. Values
read back over the GPIB should be the same as those displayed on the front panel. Connect the negative
terminal of the DVM to the COM output terminal to determine the ± dc offset voltages.
Action
Normal Result
1.
2.
Make sure the ac source is turned off. Connect the DVM directly
to the sense terminals.
Turn on the ac source with no load. In the Output menu, execute
the *RST command to reset the unit. Enable the output by
pressing Output On/Off. Program the output voltage as follows:
Output voltage at +425 Vdc
Output current near 0.
VOLT 0, OUTP:COUP DC, OFFSET 425
3.
Record DC voltage readings at the DVM and on the front panel
display.
Readings within specified dc voltage
programming and readback limits.
4.
5.
Program OFFSET −425
Output voltage at −425 Vdc
Record DC voltage readings at the DVM and on the front panel
display.
Readings within specified dc voltage
programming and readback limits.
RMS Current Accuracy Test
This test verifies the accuracy of the current measurement in rms detection mode.
Action
Normal Result
1.
2.
Turn off the ac source and connect the DVM, the 20 ohm load
resistor and current shunt as shown in Figure B-1 with S1 closed.
Connect the DVM across the current shunt.
Turn on the ac source. In the Output menu, execute the *RST
command to reset the unit. Enable the output by pressing Output
On/Off. Program the output as follows:
CC annunciator on
Output current at 3.0 (Agilent
6811B)
or 5.0 A (all other models).
For Agilent 6811B:
VOLT 50, CURR:RANGE LOW, CURR:LEV 3.00
For all other models:
VOLT 50, CURR:RANGE LOW, CURR:LEV 5.00
3.
4.
Record the DVM voltage reading and calculate the rms current.
Program CURR:RANGE HIGH
Readings within specified limits.
CC annunciator on
Output current at 3.0 (Agilent
6811B)
or 5.0 A (all other models).
5.
Record the DVM voltage reading and calculate the rms current.
Readings within specified limits.
68
Download from Www.Somanuals.com. All Manuals Search And Download.
Verification and Calibration - B
Table B-2. Agilent 6811B Verification Test Record
Model Agilent 6811B
Report No.____________Date_____________
Test Description
Minimum
Recorded Results
Maximum
Specification
Specification
Voltage Programming and Measurement Accuracy
300 Vrms accuracy at 45 Hz
Front Panel Measurement
299.250 V
Vrms −190 mV
_______V
_______V
300.750 V
Vrms +190 mV
300 Vrms accuracy at 400 Hz
Front Panel Measurement
_______V
_______V
301.800 V
Vrms +190 mV
298.200 V
Vrms −190 mV
300 Vrms accuracy at 1 kHz
Front Panel Measurement
_______V
_______V
303.300 V
Vrms +400 mV
296.700 V
Vrms −400 mV
DC Programming and Measurement Accuracy
425 Vdc accuracy
Front Panel Measurement
424.075 V
Vdc −0.277 V
_______V
_______V
425.925 V
Vrms +0.277 V
_______V
_______V
−425 Vdc accuracy
Front Panel Measurement
−425.925 V
Vrms +0.277 V
−424.075 V
Vdc −0.277 V
RMS Current Measurement Accuracy
Low Range
High Range
(Iout = calculated output current @ 60Hz)
_______A
_______A
Iout +0.0039 A
Iout +0.0095 A
Iout −0.0039 A
Iout −0.0095 A
Table B-3. Agilent 6812B Verification Test Record
Model Agilent ______________________
Report No.____________
Date_____________
Test Description
Minimum Recorded Results
Maximum
Specification
Voltage Programming and Measurement Accuracy
Specification
300 Vrms accuracy at 45 Hz
Front Panel Measurement
299.250 V
Vrms −190 mV
_______V
_______V
300.750 V
Vrms +190 mV
300 Vrms accuracy at 400 Hz
Front Panel Measurement
_______V
_______V
301.800 V
Vrms +190 mV
298.200 V
Vrms −190 mV
300 Vrms accuracy at 1 kHz
Front Panel Measurement
_______V
_______V
303.300 V
Vrms +400 mV
296.700 V
Vrms −400 mV
69
Download from Www.Somanuals.com. All Manuals Search And Download.
B - Verification and Calibration
Table B-3 (continued)
DC Programming and Measurement Accuracy
425 Vdc accuracy
Front Panel Measurement
424.075 V
Vdc −0.277 V
_______V
_______V
425.925 V
Vrms +0.277 V
_______V
_______V
−425 Vdc accuracy
Front Panel Measurement
−425.925 V
Vrms +0.277 V
−424.075 V
Vdc −0.277 V
RMS Current Measurement Accuracy
Low Range
High Range
(Iout = calculated output current @ 60Hz)
_______A
_______A
Iout +0.0045 A
Iout +0.0175 A
Iout −0.0045 A
Iout −0.0175 A
Table B-4. Agilent 6813B Verification Test Record
Model Agilent ______________________
Report No.____________
Date_____________
Test Description
Minimum Recorded Results
Maximum
Specification
Voltage Programming and Measurement Accuracy
Specification
300 Vrms accuracy at 45 Hz
Front Panel Measurement
299.250 V
Vrms −190 mV
_______V
_______V
300.750 V
Vrms +190 mV
300 Vrms accuracy at 400 Hz
Front Panel Measurement
_______V
_______V
301.800 V
Vrms +190 mV
298.200 V
Vrms −190 mV
300 Vrms accuracy at 1 kHz
Front Panel Measurement
_______V
_______V
303.300 V
Vrms +400 mV
296.700 V
Vrms −400 mV
DC Programming and Measurement Accuracy
425 Vdc accuracy
Front Panel Measurement
422.575 V
Vdc −0.277 V
_______V
_______V
427.425 V
Vrms +0.277 V
_______V
_______V
−425 Vdc accuracy
Front Panel Measurement
−427.425 V
Vrms +0.277 V
−422.575 V
Vdc −0.277 V
RMS Current Measurement Accuracy
Low Range
High Range
(Iout = calculated output current @ 60Hz)
_______A
_______A
Iout +0.0045 A
Iout +0.0175 A
Iout −0.0045 A
Iout −0.0175 A
70
Download from Www.Somanuals.com. All Manuals Search And Download.
Verification and Calibration - B
Performing the Calibration Procedure
Table B-1 lists the equipment required for calibration. Figure B-1 shows the test setup.
NOTE:
You do not have to do a complete calibration each time. You may calibrate only the
voltage or current and proceed to "Saving the Calibration Constants." However, before
you calibrate OVP, you must first calibrate the output voltage.
The following parameters may be calibrated:
♦
♦
♦
♦
♦
♦
ac output voltage
output voltage measurement
overvoltage protection (OVP)
ac output current
output current measurement
output impedance
Before calibrating the output impedance, you must first calibrate the output voltage and the output curent.
Front Panel Calibration Menu
The Entry keypad is used for calibration functions.
Press this key to access the calibration menu.
Shift
Cal
Display
CAL ON <value>
Command Function
Turns calibration mode on when the correct password
value is entered.
CAL OFF
Turns calibration mode off
CAL:LEV <char>
CAL:DATA <value>
CAL:VOLT:OFFSET
CAL:VOLT:DC
CAL:VOLT:AC
CAL:VOLT:PROT
CAL:CURR:AC
CAL:CURR:MEAS
CAL:IMP
Advance to next step in sequence (P1, P2, P3, or P4).
Input a calibration measurement.
Begin voltage offset calibration
Begin dc voltage calibration sequence
Begin ac voltage calibration sequence
Begin voltage protection calibration
Begin ac current calibration sequence
Begin current measurement calibration sequence
Begin output impedance calibration sequence
Saves the calibration constants in non-volatile memory.
Set new calibration password.
CAL:SAVE
CAL:PASS <value>
Notes:
value = a numeric value
char = a character string parameter
Use
Use
and
and
to scroll through the command list.
to scroll through the parameter list.
71
Download from Www.Somanuals.com. All Manuals Search And Download.
B - Verification and Calibration
Front Panel Calibration
WARNING: LETHAL VOLTAGES. Ac sources can supply 424 V peak at their output. DEATH
on contact may result if the output terminals or circuits connected to the output are
touched when power is applied. These procedures must be performed by a qualified
electronics technician or engineer trained on this equipment.
The following procedures assume you understand how to operate front panel keys (see Chapter 4).
Enable Calibration Mode
Action
Display
1.
*RST
Reset the unit by selecting Output, scrolling to the *RST command and
pressing Enter.
2.
3.
CAL ON 0.0
To begin calibration press Shift Cal, scroll to CAL ON and press Enter.
Enter the calibration password from Entry keypad and press Enter. lf the
password is correct the Cal annunciator will come on.
CAL DENIED
If CAL DENIED appears, then an internal switch has been set to prevent the
calibration from being changed. (see the Service Manual.)
OUT OF RANGE
lf the password is incorrect, an error occurs. If the active password is lost, the
calibration function can be recovered by setting an internal switch that
defeats password protection. (see the Service Manual.)
Calibrating and Entering Voltage Offset Values
Connect the negative terminal of the DVM to the COM output terminal. Note that some calibration
points are negative; be sure to enter the CAL:DATA as negative values when required.
Action
Display
4.
5.
6.
7.
8.
Connect the DVM (dc volts mode) directly to the ac source. Do not connect
the ratio transformer or load resistor shown in Figure B-1.
CAL:VOLT:OFFSET
CAL:LEV P1
Press Shift Calibration, scroll to the CAL VOLT OFFSET command, and
press Enter.
Press Shift Calibration, scroll to the CAL LEV P1 command, and press
Enter to select the first calibration point.
CAL:DATA 0.00
CAL:LEV P2
Press Shift Calibration, scroll to CAL DATA 0.00, and use the Entry
keypad to enter the dc voltage value displayed on the DVM.
Press Shift Calibration, scroll to the CAL LEV P1 command, use ° to
scroll to the P2 parameter, and press Enter. This selects the second
calibration point.
9.
CAL:DATA 0.00
CAL:LEV P3
Press Shift Calibration, scroll to CAL DATA 0.00, and use the Entry
keypad to enter the dc voltage value displayed on the DVM.
10.
Press Shift Calibration, scroll to the CAL LEV P1 command, use ° to
scroll to the P3 parameter, and press Enter.
72
Download from Www.Somanuals.com. All Manuals Search And Download.
Verification and Calibration - B
11.
12.
13.
CAL:DATA 0.00
CAL:LEV P4
Press Shift Calibration, scroll to CAL DATA 0.00, and use the Entry
keypad to enter the dc voltage value displayed on the DVM.
Press Shift Calibration, scroll to the CAL LEV P1 command, use ° to
scroll to the P4 parameter, and press Enter.
CAL:DATA 0.00
Press Shift Calibration, scroll to CAL DATA 0.00, and use the Entry
keypad to enter the dc voltage value displayed on the DVM.
The ac source is now holding the new voltage offset calibration constants in RAM.
Calibrating and Entering DC Voltage Gain Values
Connect the negative terminal of the DVM to the COM output terminal. Note that some calibration
points are negative; be sure to enter the CAL:DATA as negative values when required.
Action
Display
14.
15.
16.
17.
18.
Connect the DVM (dc volts mode) directly to the ac source. Do not connect
the ratio transformer or load resistor shown in Figure B-1.
CAL:VOLT:DC
CAL:LEV P1
Press Shift Calibration, scroll to the CAL VOLT DC command, and
press Enter.
Press Shift Calibration, scroll to the CAL LEV P1 command, and press
Enter to select the first calibration point.
CAL:DATA 0.00
CAL:LEV P2
Press Shift Calibration, scroll to CAL DATA 0.00, and use the Entry
keypad to enter the dc voltage value displayed on the DVM.
Press Shift Calibration, scroll to the CAL LEV P1 command, use ° to
scroll to the P2 parameter, and press Enter. This selects the second
calibration point.
19.
20.
21.
CAL:DATA 0.00
CAL:LEV P3
Press Shift Calibration, scroll to CAL DATA 0.00, and use the Entry
keypad to enter the dc voltage value displayed on the DVM.
Press Shift Calibration, scroll to the CAL LEV P1 command, use ° to
scroll to the P3 parameter, and press Enter.
CAL:DATA 0.00
Press Shift Calibration, scroll to CAL DATA 0.00, and use the Entry
keypad to enter the dc voltage value displayed on the DVM.
The ac source is now holding the new dc voltage gain calibration constants in RAM.
Calibrating and Entering AC rms Voltage Gain Values
Action
Display
22.
23.
24.
25.
Connect the DVM (ac volts mode) to the ac source using the ratio
transformer shown in Figure B-1.
CAL:VOLT:AC
CAL:LEV P1
Press Shift Calibration, scroll to the CAL VOLT AC command, and
press Enter.
Press Shift Calibration, scroll to the CAL LEV P1 command, and press
Enter to select the first calibration point.
CAL:DATA 0.00
Press Shift Calibration, scroll to CAL DATA 0.00, and use the Entry
keypad to enter the product of the transformer ratio times the ac voltage
value displayed on the DVM.
73
Download from Www.Somanuals.com. All Manuals Search And Download.
B - Verification and Calibration
26.
CAL:LEV P2
Press Shift Calibration, scroll to the CAL LEV P1 command, use ° to
scroll to the P2 parameter, and press Enter. This selects the second
calibration point.
27.
CAL:DATA 0.00
Press Shift Calibration, scroll to CAL DATA 0.00, and use the Entry
keypad to enter the product of the transformer ratio times the ac voltage
value displayed on the DVM.
28.
29.
CAL:LEV P3
Press Shift Calibration, scroll to the CAL LEV P1 command, use ° to
scroll to the P3 parameter, and press Enter.
CAL:DATA 0.00
Press Shift Calibration, scroll to CAL DATA 0.00, and use the Entry
keypad to enter the product of the transformer ratio times the ac voltage
value displayed on the DVM.
30.
31.
CAL:LEV P4
Press Shift Calibration, scroll to the CAL LEV P1 command, use ° to
scroll to the P4 parameter, and press Enter.
CAL:DATA 0.00
Press Shift Calibration, scroll to CAL DATA 0.00, and use the Entry
keypad to enter the product of the transformer ratio times the ac voltage
value displayed on the DVM.
The ac source is now holding the new ac rms voltage calibration constants in RAM.
Calibrating the OVP Trip Point
Action
Display
32.
33.
CAL:VOLT:PROT
Press Shift Calibration, scroll to CAL VOLT PROT, and press Enter.
Wait for the ac source to compute the OVP calibration constant. The
display returns to Meter mode when the OVP calculation is complete.
The ac source is now holding the new OVP calibration constants in RAM.
Calibrating and Entering rms Current Values
Action
Display
34.
35.
36.
37.
Connect the DVM (ac rms mode), current shunt, and load resistor as shown
in figure B-1 with S1 closed.
CAL:CURR:AC
CAL:LEV P1
Press Shift Calibration, scroll to the CAL CURR AC command, and
press Enter.
Press Shift Calibration, scroll to the CAL LEV P1 command, and press
Enter.
CAL:DATA 0.00
Press Shift Calibration, scroll to the CAL DATA 0.00 command.
Calculate the rms current value (DVM ac rms voltage/shunt resistance), and
use the Entry keypad to enter the rms current.
38.
39.
CAL:LEV P2
Press Shift Calibration, scroll to the CAL LEV P1 command, use ° to
scroll to the P2 parameter, and press Enter.
CAL:DATA 0.00
Press Shift Calibration, scroll to the CAL DATA 0.00 command.
Calculate the rms current value (DVM ac rms voltage/shunt resistance), and
use the Entry keypad to enter the rms current.
The ac source is now holding the new rms current calibration constants in RAM.
74
Download from Www.Somanuals.com. All Manuals Search And Download.
Verification and Calibration - B
Calibrating and Entering rms Current Measurement Values
Action
Display
40.
41.
42.
43.
Connect the DVM (ac rms mode), current shunt, and load resistor as shown
in figure B-1 with S1 closed.
CAL:CURR:MEAS
CAL:LEV P1
Press Shift Calibration, scroll to the CAL CURR MEAS command, and
press Enter.
Press Shift Calibration, scroll to the CAL LEV P1 command, and press
Enter.
CAL:DATA 0.00
Press Shift Calibration, scroll to the CAL DATA 0.00 command.
Calculate the rms current value (DVM ac rms voltage/shunt resistance), and
use the Entry keypad to enter the rms current.
44.
45.
CAL:LEV P2
Press Shift Calibration, scroll to CAL LEV P1 command, use ° to scroll
to the P2 parameter, and press Enter.
CAL:DATA 0.00
Press Shift Calibration, scroll to the CAL DATA 0.00 command.
Calculate the rms current value (DVM ac rms voltage/shunt resistance), and
use the Entry keypad to enter the rms current.
The ac source is now holding the new rms current measurement calibration constants in RAM.
Calibrating the Output Impedance
Action
Display
46.
47.
48.
Connect only the output impedance resistor across the output of the ac
source. Do not connect any other equipment.
CAL:IMP
Press Shift Calibration, scroll to the CAL IMP command, and press
Enter.
Wait for the ac source to compute the output impedance calibration
constant. The display returns to Meter mode when the calculation is
complete.
The ac source is now holding the new output impedance calibration constants in RAM.
Saving the Calibration Constants
CAUTION:
Storing calibration constants overwrites the existing ones in non-volatile memory. If you
are not sure you want to permanently store the new constants, omit this step. The ac
source calibration will then remain unchanged.
Action
Display
49.
50.
CAL:SAVE
CAL OFF
Press Shift Calibration, scroll to CAL SAVE, and press Enter.
Press Shift Calibration, select CAL OFF, and press Enter to exit
Calibration mode. *RST and *RCL will also set the calibration state to
OFF.
75
Download from Www.Somanuals.com. All Manuals Search And Download.
B - Verification and Calibration
Changing the Calibration Password
The factory default password is 0. You can change the password when the ac source is in calibration
mode (which requires you to enter the existing password). Proceed as follows:
Action
Display
1.
2.
3.
4.
CAL ON 0.0
Begin by pressing Shift Cal and scrolling to the CAL ON command.
Enter the existing password from Entry keypad and press Enter
Press Shift Cal and scroll to the CAL PASS command.
CAL:PASS 0
Enter the new password from the keypad. You can use any number with up
to six digits and an optional decimal point. If you want the calibration
function to operate without requiring any password, change the password to
0 (zero).
NOTE:
If you want the calibration function to operate without requiring any password, change
the password to 0 (zero).
Calibration Error Messages
Errors that can occur during calibration are shown in the following table.
Table B-5. GPIB Calibration Error Messages
Error
401
402
403
404
405
406
Meaning
CAL switch prevents calibration (This is a hardware disable, see the ac source Service Manual.)
CAL password is incorrect
CAL not enabled
Computed readback cal constants are incorrect
Computed programming cal constants are incorrect
Incorrect sequence of calibration commands
Calibration Over the GPIB
You can calibrate the ac source by using SCPI commands within your controller programming
statements. Be sure you are familiar with calibration from the front panel before you calibrate from a
controller. Each front panel calibration command has a corresponding SCPI command.
The SCPI calibration commands are explained in Chapter 3 of the ac source Programming Guide.
Calibration error messages that can occur during GPIB calibration are shown in table B-3.
Agilent Calibration Program Listing
Figure B-2, Sheets 1 through 3, lists the calibration program. This program can be run on any controller
operating under Agilent BASIC. The assumed power supply address is 705 and calibration password is 0.
If required, change these parameters in the appropriate statements.
76
Download from Www.Somanuals.com. All Manuals Search And Download.
Verification and Calibration - B
10
!
20
! AC Source calibration program
Rev B.00.00
30
!
40
ASSIGN @Ac TO 705
!
50
60
PRINT TABXY(5,5),"This program will calibrate the 6811B/12B/13B AC Power Solutions."
70
PRINT TABXY(5,7),"Equipment requirements are:
PRINT TABXY(37,8),"0.01 ohm <200ppm Current Shunt"
Agilent3458A or equivalent DVM"
80
90
PRINT TABXY(37,9),"20 ohm >1800 watt power resistor for all models"
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
360
370
380
390
400
410
420
430
440
450
460
470
480
490
500
510
520
530
540
550
PRINT TABXY(37,10),"1 ohm >100 watt impedance resistor"
PRINT TABXY(37,11),"30:1 <50ppm Ratio Transformer"
PRINT TABXY(3,13),"Ratio Transformer is required to when calibrating to MIL-STD-45662A. If the"
PRINT TABXY(2,14),"ratio transformer is not used the measurement uncertainty must be recalculated."
!
DISP "Press CONT to continue"
PAUSE
CLEAR SCREEN
PRINT TABXY(15,5),"1. Turn the AC Source off"
PRINT TABXY(15,7),"2. Disconnect all loads"
PRINT TABXY(15,9),"3. Connect the 3458A to the rear terminal block"
PRINT TABXY(15,11),"4. Set the 3458A to DC VOLTS"
PRINT TABXY(15,13),"5. Turn on the AC Source"
!
DISP "Press CONT to begin DC OFSET and DC GAIN calibration"
PAUSE
CLEAR SCREEN
PRINT TABXY(25,5),"CALIBRATING VOLTAGE OFFSET"
PRINT TABXY(20,7),"There are 4 points to be calibrated"
OUTPUT @Ac;"CAL:STATE ON"
OUTPUT @Ac;"CAL:VOLT:OFFS"
OUTPUT @Ac;"CAL:LEV P1"
WAIT 10
INPUT "Enter DC offset voltage reading from DVM",Off_p1
PRINT TABXY(25,9),"Point 1 entered"
OUTPUT @Ac;"CAL:DATA";Off_p1
OUTPUT @Ac;"CAL:LEV P2"
WAIT 10
INPUT "Enter DC offset voltage reading from DVM",Off_p2
PRINT TABXY(25,11),"Point 2 entered"
OUTPUT @Ac;"CAL:DATA";Off_p2
OUTPUT @Ac;"CAL:LEV P3"
WAIT 10
INPUT "Enter DC offset voltage reading from DVM",Off_p3
PRINT TABXY(25,13),"Point 3 entered"
OUTPUT @Ac;"CAL:DATA";Off_p3
OUTPUT @Ac;"CAL:LEV P4"
WAIT 10
INPUT "Enter DC offset voltage reading from DVM",Off_p4
PRINT TABXY(25,15),"Point 4 entered"
OUTPUT @Ac;"CAL:DATA";Off_p4
WAIT 3
CLEAR SCREEN
PRINT TABXY(25,5),"CALIBRATING DC VOLTAGE GAIN"
PRINT TABXY(20,7),"There are 3 points to be calibrated"
OUTPUT @Ac;"CAL:VOLT:DC"
Figure B-2. Calibration Program Listing (Sheet 1 of 3)
77
Download from Www.Somanuals.com. All Manuals Search And Download.
B - Verification and Calibration
560
570
580
590
600
610
620
630
640
650
660
670
680
690
700
710
720
730
740
750
760
770
780
790
800
810
820
830
840
850
860
870
880
890
900
910
920
930
940
950
960
970
980
990
OUTPUT @Ac;"CAL:LEV P1"
WAIT 10
INPUT "Enter DC voltage reading from DVM",Dc_p1
PRINT TABXY(25,9),"Point 1 entered"
OUTPUT @Ac;"CAL:DATA";Dc_p1
OUTPUT @Ac;"CAL:LEV P2"
WAIT 10
INPUT "Enter DC voltage reading from DVM",Dc_p2
PRINT TABXY(25,11),"Point 2 entered"
OUTPUT @Ac;"CAL:DATA";Dc_p2
OUTPUT @Ac;"CAL:LEV P3"
WAIT 10
INPUT "Enter DC voltage reading from DVM",Dc_p3
PRINT TABXY(25,13),"Point 3 entered"
OUTPUT @Ac;"CAL:DATA";Dc_p3
WAIT 3
CLEAR SCREEN
PRINT TABXY(5,10),"1. Connect the 3458A to the rear terminals via the ratio transformer"
PRINT TABXY(18,12),"2. Set the 3458A to AC VOLTS"
!
DISP "Press CONT to begin AC PROGRAMMING and MEASUREMENT calibration"
PAUSE
CLEAR SCREEN
PRINT TABXY(18,5),"CALIBRATING AC POGRAMMING and MEASUREMENT"
PRINT TABXY(20,7),"There are 4 points to be calibrated"
OUTPUT @Ac;"CAL:VOLT:AC"
OUTPUT @Ac;"CAL:LEV P1"
WAIT 10
INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p1
PRINT TABXY(25,9),"Point 1 entered"
OUTPUT @Ac;"CAL:DATA";Ac_p1
OUTPUT @Ac;"CAL:LEV P2"
WAIT 10
INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p2
PRINT TABXY(25,11),"Point 2 entered"
OUTPUT @Ac;"CAL:DATA";Ac_p2
OUTPUT @Ac;"CAL:LEV P3"
WAIT 10
INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p3
PRINT TABXY(25,13),"Point 3 entered"
OUTPUT @Ac;"CAL:DATA";Ac_p3
OUTPUT @Ac;"CAL:LEV P4"
WAIT 3
INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p4
1000 PRINT TABXY(25,15),"Point 4 entered"
1010 OUTPUT @Ac;"CAL:DATA";Ac_p4
1020 WAIT 10
1030 CLEAR SCREEN
1040 PRINT TABXY(15,10),"CALIBRATING OVERVOLTAGE PROTECTION"
1050 OUTPUT @Ac;"CAL:VOLT:PROT"
1060 PRINT TABXY(30,15),"WAIT"
1070 WAIT 30
1071 OUTPUT @Ac;"CAL:SAVE"
1072 OUTPUT @Ac;"CAL:STATE OFF"
1080 CLEAR SCREEN
1090 PRINT TABXY(15,5),"1. Turn off the AC Source"
1100 PRINT TABXY(15,7),"2. Connect the current shunt and 20 ohm load resistor, see fig.B-1"
Figure B-2. Calibration Program Listing (Sheet 2 of 3)
78
Download from Www.Somanuals.com. All Manuals Search And Download.
Verification and Calibration - B
1110 PRINT TABXY(15,9),"3. Connect the 3458A across the current shunt"
1120 PRINT TABXY(15,11),"4. Set the 3458A to AC rms VOLTS"
1130 PRINT TABXY(15,13),"5. Turn on the AC Source"
1140 !
1150 DISP "Press CONT to begin Current Program and Measurement calibration"
1160 PAUSE
1170 CLEAR SCREEN
1180 PRINT TABXY(22,5),"CALIBRATING CURRENT POGRAMMING"
1190 PRINT TABXY(20,7),"There are 2 points to be calibrated"
1191 OUTPUT @Ac;"CAL:STATE ON"
1200 OUTPUT @Ac;"CAL:CURR:AC"
1210 OUTPUT @Ac;"CAL:LEV P1"
1220 WAIT 10
1230 INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Ai_p1
1240 PRINT TABXY(25,9),"Point 1 entered"
1250 OUTPUT @Ac;"CAL:DATA";Ai_p1
1260 OUTPUT @Ac;"CAL:LEV P2"
1270 WAIT 10
1280 INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Ai_p2
1290 PRINT TABXY(25,11),"Point 2 entered"
1300 OUTPUT @Ac;"CAL:DATA";Ai_p2
1310 WAIT 10
1320 CLEAR SCREEN
1330 PRINT TABXY(22,5),"CALIBRATING CURRENT MEASUREMENT"
1340 PRINT TABXY(20,7),"There are 2 points to be calibrated"
1350 OUTPUT @Ac;"CAL:CURR:MEAS"
1360 OUTPUT @Ac;"CAL:LEV P1"
1370 WAIT 10
1380 INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Am_p1
1390 PRINT TABXY(25,9),"Point 1 entered"
1400 OUTPUT @Ac;"CAL:DATA";Am_p1
1410 OUTPUT @Ac;"CAL:LEV P2"
1420 WAIT 10
1430 INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Am_p2
1440 PRINT TABXY(25,11),"Point 2 entered"
1450 OUTPUT @Ac;"CAL:DATA";Am_p2
1460 WAIT 10
1470 OUTPUT @Ac;"CAL:SAVE"
1480 OUTPUT @Ac;"CAL:STATE OFF"
1490 CLEAR SCREEN
1500 !
1510 !
1520 PRINT TABXY(15,5),"1. Turn off the AC Source"
1530 PRINT TABXY(15,7),"2. Disconnect all equipment from the AC Source"
1540 PRINT TABXY(15,9),"3. Connect the 1 ohm impedance resistor, see fig.B-1"
1550 PRINT TABXY(15,11),"4. Turn on the AC Source"
1560 !
1570 DISP "Press CONT to begin Output Impedance calibration"
1580 PAUSE
1590 PRINT TABXY(15,10),"CALIBRATING OUTPUT IMPEDANCE"
1600 OUTPUT @Ac;"CAL:STATE ON"
1610 OUTPUT @Ac;"CAL:IMP"
1620 PRINT TABXY(30,15),"WAIT"
1630 WAIT 30
1640 OUTPUT @Ac;"CAL:SAVE"
1650 OUTPUT @Ac;"CAL:STATE OFF"
1660 CLEAR SCREEN
1670 PRINT TABXY(25,10),"CALIBRATION COMPLETE"
1680 END
Figure B-2. Calibration Program Listing (Sheet 3 of 3)
79
Download from Www.Somanuals.com. All Manuals Search And Download.
Download from Www.Somanuals.com. All Manuals Search And Download.
C
Error Messages
Error Number List
This appendix gives the error numbers and descriptions that are returned by the ac source. Error numbers
are returned in two ways:
♦
♦
Error numbers are displayed on the front panel
Error numbers and messages are read back with the SYSTem:ERRor? query. SYSTem:ERRor?
returns the error number into a variable and returns two parameters: an NR1 and a string.
The following table lists the errors that are associated with SCPI syntax errors and interface problems. It
also lists the device dependent errors. Information inside the brackets is not part of the standard error
message, but is included for clarification. When errors occur, the Standard Event Status register records
them in bit 2, 3, 4, or 5:
Table C-1. Error Numbers
Error Number Error String [Description/Explanation/Examples]
Command Errors –100 through –199 (sets Standard Event Status Register bit #5)
–100 Command error [generic]
–101 Invalid character
–102 Syntax error [unrecognized command or data type]
–103 Invalid separator
–104 Data type error [e.g., "numeric or string expected, got block data"]
–105 GET not allowed
–108 Parameter not allowed [too many parameters]
–109 Missing parameter [too few parameters]
–112 Program mnemonic too long [maximum 12 characters]
–113 Undefined header [operation not allowed for this device]
–121 Invalid character in number [includes "9" in octal data, etc.]
–123 Numeric overflow [exponent too large; exponent magnitude >32 k]
–124 Too many digits [number too long; more than 255 digits received]
–128 Numeric data not allowed
–131 Invalid suffix [unrecognized units, or units not appropriate]
–138 Suffix not allowed
–141 Invalid character data [bad character, or unrecognized]
–144 Character data too long
–148 Character data not allowed
–150 String data error
–151 Invalid string data [e.g., END received before close quote]
–158 String data not allowed
–160 Block data error
81
Download from Www.Somanuals.com. All Manuals Search And Download.
C - Error Messages
–161 Invalid block data [e.g., END received before length satisfied]
–168 Block data not allowed
–170 Expression error
–171 Invalid expression
–178 Expression data not allowed
Execution Errors –200 through –299 (sets Standard Event Status Register bit #4)
–200 Execution error [generic]
–221 Settings conflict [check current device state]
–222 Data out of range [e.g., too large for this device]
–223 Too much data [out of memory; block, string, or expression too long]
–224 Illegal parameter value [device-specific]
–225 Out of memory
–270 Macro error
–272 Macro execution error
–273 Illegal macro label
–276 Macro recursion error
–277 Macro redefinition not allowed
System Errors –300 through –399 (sets Standard Event Status Register bit #3)
–310 System error [generic]
–350 Too many errors [errors beyond 9 lost due to queue overflow]
Query Errors –400 through –499 (sets Standard Event Status Register bit #2)
–400 Query error [generic]
–410 Query INTERRUPTED [query followed by DAB or GET before response complete]
–420 Query UNTERMINATED [addressed to talk, incomplete programming message received]
–430 Query DEADLOCKED [too many queries in command string]
–440 Query UNTERMINATED [after indefinite response]
Selftest Errors 0 through 99 (sets Standard Event Status Register bit #3)
0
1
2
3
4
5
6
7
No error
Non-volatile RAM RD0 section checksum failed
Non-volatile RAM CONFIG section checksum failed
Non-volatile RAM CAL section checksum failed
Non-volatile RAM WAVEFORM section checksum failed
Non-volatile RAM STATE section checksum failed
Non-volatile RAM LIST section checksum failed
Non-volatile RAM RST section checksum failed
10 RAM selftest
11 - 31 DAC selftest error, expected <n>, read <reading>
Errors 11, 12, 13, 14, 15 apply to DAC12 1A and 1B
Errors 16, 17, 18 apply to DAC12 2A
Errors 19, 20, 21 apply to DAC12 2B
Errors 22, 23 apply to DAC12 4A
Errors 24, 25 apply to DAC12 4B
Errors 26, 27, 28 apply to DAC12 3A and 3B
Errors 29, 30, 31 apply to DAC12 5A and 5B
82
Download from Www.Somanuals.com. All Manuals Search And Download.
Error Messages - C
40 Voltage selftest error, output 1
41 Voltage selftest error, output 2
42 Voltage selftest error, output 3
43 Current selftest error, output 1
44 Current selftest error, output 2
45 Current selftest error, output 3
70 Fan voltage failure
80 Digital I/O selftest error
Device-Dependent Errors 100 through 32767 (sets Standard Event Status Register bit #3)
200 Outgrd not responding
201 Front panel not responding
210 Ingrd receiver framing error
211 Ingrd uart overrun status
212 Ingrd received bad token
213 Ingrd receiver buffer overrun
214 Ingrd input buffer overrun
215 Outgrd output buffer overrun
216 RS-232 receiver framing error
217 RS-232 receiver parity error
218 RS-232 receiver overrun error
219 Ingrd inbuf count sync error
220 Front panel uart overrun
221 Front panel uart framing
222 Front panel uart parity
223 Front panel buffer overrun
224 Front panel timeout
401 CAL switch prevents calibration
402 CAL password is incorrect
403 CAL not enabled
404 Computed readback cal constants are incorrect
405 Computed programming cal constants are incorrect
406 Incorrect sequence of calibration commands
600 Systems in mode:list have different list lengths
601 Requested voltage and waveform exceeds peak voltage capability
602 Requested voltage and waveform exceeds transformer volt-second rating
603 Command only applies to RS-232 interface
604 Trigger received before requested number of pre-trigger readings
605 Requested RMS current too high for voltage range
606 Waveform data not defined
607 VOLT, VOLT:SLEW, and FUNC:SHAP modes incompatible
608 Measurement overrange
609 Output buffer overrun
610 Command cannot be given with present SYST:CONF setting
83
Download from Www.Somanuals.com. All Manuals Search And Download.
Download from Www.Somanuals.com. All Manuals Search And Download.
D
Line Voltage Conversion
WARNING: Shock Hazard Hazardous voltage can remain inside the unit even after it
has been turned off. This procedure should only be done by qualified
electronics service personnel.
Open the Unit
♦
♦
Turn off the ac power to the unit and disconnect the power cord from the power outlet.
Remove the four screws that secure the two carrying straps and outer cover (use a T25
Torx drive).
♦
♦
Slightly spread the bottom rear of the cover and pull it back to remove it from the front
panel.
Observe the two LEDs that are visible in the cutouts on each side of the unit. If either
LED is on, there is hazardous voltage inside the unit. Wait until the LED goes out
before proceeding (this may take several minutes).
Check the Jumper Wire (Model Agilent 6811B/6812B only)
♦
Locate the line voltage jumper wire in the cutout at the side of the unit by the line cord
(see Figure D-1).
♦
For 100 V or 120 V operation, install the jumper on the lug labeled:100/120.
For 200 V, 208 V or 230 V operation, install the jumper on the lug labeled: 200/220.
Check the Line Jumpers (all Models)
♦
♦
Locate the line jumpers in the cutout at the side of the unit by the on/off switch.
Configure the jumpers according to the line voltage shown in the accompanying label.
When configuring a unit for 208 V, use the jumper settings shown for 200 V.
Check the Power Transformer Connector (all Models)
NOTE:
This procedure is only required if you are changing the input voltage between
100 V and 120 V or between 200/208 V and 230 V.
♦
♦
♦
Remove the screws securing the inner cover (use a T15 Torx drive).
Remove the inner cover.
Remove the screws securing the pc board behind the front panel (use a T15 Torx drive).
85
Download from Www.Somanuals.com. All Manuals Search And Download.
D - Line Voltage Conversion
♦
♦
♦
You need only to lift the board out of the way, you do not need to disconnect any cables.
Locate the connector in front of the power transformer.
For 100 V, 200 V, or 208 V operation, install the plug on the connector labeled: 200 V
input.
For 120 V or 230 V operation, install the plug on the connector labeled: 240 V input.
♦
Replace the pc board and inner cover.
NOTE:
Be sure to replace all of the screws removed in steps 9 and 11.
Close the Unit
♦
♦
♦
Replace the outer cover.
Change the label on the rear panel to reflect the changed input voltage rating.
Reconnect the power and turn on the unit.
NOTE:
Line voltage conversion does not require any fuse changes.
!! WARNING!!
If LEDs are on,
HAZARDOUS
voltages are present!
LEFT SIDE
RIGHT SIDE
(with cover removed)
(withcover removed)
Jumper Settings
100
120
200
230
JUMPER WIRE
POWER TRANSFORMER
LINE JUMPERS
Figure D-1. Line Voltage Conversion Components
86
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
—A—
—E—
—F—
ac line conversion, 85
accessories, 12
airflow, 22
annunciators
φ1, 38
entry keys, 46
, 46
0 ... 9, 46
Clear Entry, 46
E, 46
Enter, 46
Addr, 38
Cal, 38
CC, 38
CV, 38
Dis, 38
Err, 38
error messages, 34
error numbers, 81
OCP, 38
features, 13
Prot, 38
Fixed, 50
Rmt, 38
Shift, 38
SRQ, 38
Tran, 38
FLT connections, 27
frequency control, 14
front panel, 37
annuncuiators, 38
Unr, 38
AWG ratings, 25
controls and indicators, 14, 37
keys, 38
function keys, 40
, 40
Index, 40
—C—
immediate action, 40
Output On/Off, 40
Phase Select, 40
Trigger, 40
cables, 12
calibration, 71
ac rms voltage gain, 73
dc voltage gain, 73
enable, 72
fuses, 23
equipment, 65
error messages, 76
menu, 71
—G—
output impedance, 75
OVP, 74
password, 76
program listing, 76
rms current, 74, 75
saving, 75
general information, 11
ground, earth, 12
guide, programming, 11
guide, user’s, 11
GPIB, 58
address, 58
setup, 66
connections, 28
voltage offset, 72
capabilities, 14
cleaning, 21
—H—
conversion, ac line, 85
hazardous voltages, 65
history, 6
—D—
—I—
damage, 21
dc offset, 48
INH connections, 27
input
digital connections, 27
digital connector, 21
dimensions, 22
connections, 23
power, 12
inrush current capability, 17
inspection, 21
87
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
Phase, 43
Pulse, 43
—L—
lethal voltages, 65
line fuse
replacing, 35
line voltage conversion, 85
List, 50, 52
Shape, 43
Voltage, 42
output coupling
ac, 19, 48
dc, 19, 48
load regulation, 18
load voltage drops, 25
location, 22
output impedance
<1 ohm, 18
reactive, 18
real, 18
low frequency operation (<45 Hz), 15, 63
OV, 49
OVLD, 34
—M—
manuals, 11, 21
measure
—P—
ac only, 48
ac+dc, 48
dc only, 48
meter
parts - operator replaceable, 13
peak current capability, 16
peak current limit, 16
peak inrush capacitance, 16
Peak Inrush current
measuring, 57
ac, 48
ac+dc, 48
dc, 48
Phase synchronization, 53
power cord, 21
installation, 23
power receptacle, 12
preliminary checkout, 31
print date, 6
Meter AC+DC, 38
meter display keys
Harmonic, 41
Input, 41
Meter, 41
program listing
calibration, 76
protection
—N—
OCP, 49
OT, 49
OV, 49
Rail, 49
non-volatile memory
clearing, 58
storing, 39
RI, 49
SOA, 49
—O—
protection/status keys
Protect, 44
Status, 44
Pulse, 51
OCP, 49
offset, 48
operating features, 13
options, 12
OT, 49
output
—R—
ac+dc, 48
rack mount kit, 12
rack mounting, 22
Rail, 49
real-time voltage regulation, 18
recalling operating states, 58
remote programming, 15
remote sensing, 25
OVP considerations, 27
repacking, 21
characteristic, 15
clearing output protection, 49
connections, 24
connector, 21
control keys
Output, 43
rating, 15
setting output protection, 49
setting the amplitude, 47
setting the dc offset, 48
setting the frequency, 48
Output AC+DC, 38
output checkout, 32
output control keys
Current, 42
RI, 49
rms current limit, 18
rms voltage regulation, 18
RS-232, 58
connections
interface commands, 29
data format, 29
Freq, 42
handshake, 30
88
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
interface cable, 30
pinouts, 29
equipment, 65
rms current accuracy, 68
setup, 66
test record, 69
—S—
verification tests, 31
voltage control, 14
voltage regulation
real-time, 18
safety class, 12
safety summary, 3
safety warning, 12
saving operating states, 58
self-test, 31
rms, 18
selftest errors, 34
sense connections, 25
service guide, 12
shift annunciator, 32
shift key, 32
Slew rates
programming, 55
SOA, 49
—W—
warranty, 2
Waveform
generation, 55
wire
current ratings, 25
wiring considerations, 25
SOA limit, 16
specifications, 59
Step, 50
supplemental characteristics, 61
SYSTem
LOCal, 29
REMote, 29
RWLock, 29
system errors, 81
system keys, 39
Address, 39
Error, 39
Interface, 39
Local, 39
RCL, 39
Save, 39
Shift, 39
—T—
transient voltage
fixed, 50
list, 50, 52
pulse, 51
step, 50
transient voltage mode, 50
trigger connections, 27
Trigger delays, 53
trigger IN, 27
trigger OUT, 27
trigger/list keys
List, 45
Trigger Control, 45
turn-on checkout, 31, 67
—V—
verification, 32
ac measurement accuracy, 67
ac voltage programming, 67
dc measurement accuracy, 68
dc voltage programming, 68
89
Download from Www.Somanuals.com. All Manuals Search And Download.
Agilent Sales and Support Offices
For more information about Agilent Technologies test and measurement products, applications,
services, and for a current sales office listing, visit our web site:
You can also contact one of the following centers and ask for a test and measurement sales
representative.
United States:
Latin America:
Agilent Technologies
Test and Measurement Call Center
P.O. Box 4026
Englewood, CO 80155-4026
(tel) 1 800 452 4844
Agilent Technologies
Latin American Region Headquarters
5200 Blue Lagoon Drive, Suite #950
Miami, Florida 33126
U.S.A.
(tel) (305) 267 4245
(fax) (305) 267 4286
Canada:
Australia/New Zealand:
Agilent Technologies Canada Inc.
5150 Spectrum Way
Mississauga, Ontario
L4W 5G1
Agilent Technologies Australia Pty Ltd
347 Burwood Highway
Forest Hill, Victoria 3131
(tel) 1-800 629 485 (Australia)
(fax) (61 3) 9272 0749
(tel) 1 877 894 4414
(tel) 0 800 738 378 (New Zealand)
(fax) (64 4) 802 6881
Europe:
Asia Pacific:
Agilent Technologies
Test & Measurement European Marketing Organisation
P.O. Box 999
1180 AZ Amstelveen
The Netherlands
Agilent Technologies
24/F, Cityplaza One, 1111 King’s Road,
Taikoo Shing, Hong Kong
tel: (852)-3197-7777
fax: (852)-2506-9284
(tel) (31 20) 547 9999
Japan:
Agilent Technologies Japan Ltd.
Measurement Assistance Center
9-1, Takakura-Cho, Hachioji-Shi,
Tokyo 192-8510, Japan
(tel) (81) 426 56 7832
(fax) (81) 426 56 7840
Technical data is subject to change.
90
Download from Www.Somanuals.com. All Manuals Search And Download.
Manual Updates
The following updates have been made to this manual since the print revision indicated on the
title page.
4/15/00
All references to HP have been changed to Agilent.
All references to HP-IB have been changed to GPIB.
Download from Www.Somanuals.com. All Manuals Search And Download.
|