®
Fluke 39/41B
Power Harmonics Tester
Users Manual
4822 872 00916
July 1995 Rev. 3, 11/00
© 1995 Fluke Corporation. All rights reserved. Printed in the Netherlands.
All product names are trademarks of their respective companies.
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SERVICE CENTERS
To locate an authorized service center, visit us on the World Wide Web:
or call Fluke using any of the phone numbers listed below:
+1-888-993-5853 in U.S.A. and Canada
+31-402-678-200 in Europe
+1-425-356-5500 from other countries
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Table of Contents
Title
Page
Safety ................................................................................................
About This Manual.............................................................................
Uses for the Tester .............................................................................
Unpacking..........................................................................................
Terminology Used in This Manual......................................................
Battery Considerations .......................................................................
Memory Retention..............................................................................
Automatic Power Down......................................................................
Getting Acquainted with Your Tester .................................................
Input Connections...............................................................................
Using the Voltage Test Leads ........................................................
v
1
1
2
5
6
6
6
7
9
9
Using the Current Probe ................................................................ 10
Three-Phase Power Measurements ..................................................... 11
Keypad............................................................................................... 14
Display Screen ................................................................................... 19
Functions and Screen Modes .............................................................. 25
Waveform Screen Mode ................................................................ 25
Harmonics Screen Mode................................................................ 27
Harmonics Zoom Mode ................................................................. 30
Text Screen Mode ......................................................................... 31
VA Check Screen ............................................................................... 33
Recording Measurements ................................................................... 35
Power-Up Configuration..................................................................... 37
Storing & Recalling Measurements (Model 41B)................................ 39
Using the Serial Cable (Model 41B)................................................... 41
Printing (Model 41B) ......................................................................... 43
Sending to a Printer or PC (Model 41B) ............................................. 43
Using PC Software With the Tester (Model 41B) ............................... 43
Applications....................................................................................... 44
Plant Switch Gear (Service Entrance) ............................................ 46
Distribution Transformer............................................................... 47
Electronic Equipment Load Center ................................................ 48
Generator Set ................................................................................ 50
i
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Fluke 39/41B
Users Manual
Adjustable Frequency (Speed) Motor Drive................................... 51
User Maintenance .............................................................................. 52
Cleaning........................................................................................ 52
Fuse Replacement ......................................................................... 52
Battery Replacement ..................................................................... 52
Operational Test............................................................................ 54
If the Screen Flashes or is Blank at Power-Up ............................... 54
If Your Tester Does Not Work....................................................... 54
Accessories and Replacement Parts .................................................... 55
Specifications..................................................................................... 57
ii
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List of Tables
Table
Title
Page
1.
2.
3.
4.
5.
Key Descriptions...................................................................... 15
Status Line............................................................................... 20
Screen Abbreviations................................................................ 21
Special Messages ..................................................................... 24
Replacement Parts.................................................................... 56
iii
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List of Figures
Figure
Title
Page
1.
2.
3.
4.
5.
Tester and Accessories .............................................................
Additional Items (Model 41B)..................................................
Getting Acquainted ..................................................................
Measurement Connections (1 ) .............................................. 10
Three-Phase Measurement Connections
(For Balanced Circuits, 3 , 3-Conductor, ).......................... 11
Three-Phase Measurement, Balanced or Unbalanced Connections
3
4
8
6.
7.
(3 , 3-Conductor,
or ) ................................................... 12
Three-Phase Measurement, Balanced or Unbalanced Connections
(3 , 4-Conductor) ................................................................... 13
Keypad..................................................................................... 14
Display Screen ......................................................................... 19
8.
9.
10. Waveform Screens.................................................................... 26
11. Harmonics Screens................................................................... 28
12. Harmonics Overload Screen ..................................................... 29
13. Harmonics Zoom Screen........................................................... 30
14. Text Screens ............................................................................ 32
15. Typical VA Check Signatures................................................... 34
16. Record Screens......................................................................... 36
17. Configuration Screens .............................................................. 38
18. Memory Screen ........................................................................ 39
19. Serial Communications (Model 41B)........................................ 42
20. Typical Applications................................................................. 45
21. Plant Switch Gear .................................................................... 46
22. Distribution Transformer (1 Watts Text Screen) ................... 47
23. Distribution Transformer (3 , 3C Watts Text Screen)............. 48
24. Receptacle Load Center (Neutral Current Measurement) .......... 49
25. Generator Set ........................................................................... 50
26. Adjustable Frequency Motor Drive........................................... 51
27. Battery Replacement ................................................................ 53
iv
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Using Your Tester Safely
Warning
To avoid electric shock, use only the test leads supplied
with the Tester. Use 600V rated probe tip adapters.
(“600V” is printed on the equipment.) Remove all test
leads that are not in use.
Use only the 80i-500s ac current probe or a safety-
designed equivalent (such as the Fluke Model 80i-1000s)
that is rated for 600V on both the jaws and the measuring
secondary. Remove any current probe that is not in use.
In this manual, a WARNING identifies conditions and actions that pose haz-
ard(s) to the user. A Caution identifies conditions and actions that may dam-
age the tester or the current probe. See below for explanations of international
electrical symbols.
Read the following safety information carefully before attempting to operate
or service the Tester or the current probe.
CAUTION see explanation in
DANGEROUS VOLTAGE
manual
AC-ALTERNATING CURRENT
DC-DIRECT CURRENT
Equipment protected throughout
by DOUBLE INSULATION or
REINFORCED INSULATION
Either DC or AC
EARTH
RECYCLING
HIGH BNC INPUT
International Safety Symbols
Safety Guidelines for Tester and Voltage Probe
To ensure that you use your Tester safely, follow these guidelines:
•
•
Avoid working alone.
Inspect the test leads for damaged insulation or exposed metal. Check test
lead continuity with a multimeter. Replace damaged leads.
•
Do not use the Tester if it looks damaged.
v
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•
•
When using the voltage test leads, keep your fingers away from the probe
contacts. Keep your fingers behind the finger guards on the probes.
Use caution when measuring above 60V-dc or 30V-ac rms. Such voltages
pose a shock hazard.
AC Current Probe Safety Guidelines
Follow these safety guidelines when using the AC Current Probe:
•
Never use the 80i-500s current probe on circuits rated higher than
600V. Use extreme caution when clamping the current probe around un-
insulated conductors or bus bars.
•
•
Keep your fingers behind the finger guard on the 80i-500s.
Check the magnetic mating surfaces of the probe jaws; these should be
free of dirt, dust, rust, or other foreign matter.
•
•
Do not use a current probe that has been cracked or damaged or has de-
fective leads. If there is any such sign of impaired operation, tape the
probe shut to prevent operation.
The 80i-500s has been designed and tested according to IEC 1010-1:1992
and other safety standards. Follow all warnings to ensure safe operation.
vi
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About This Manual
This manual contains instructions for the 39 and 41B Power Harmonics
Testers (hereafter referred to as the Tester). All information applies to both
models unless otherwise indicated.
Uses for the Tester
You can use the Tester to measure voltage and current inputs at power line
and harmonic frequencies. Using these inputs, the Tester automatically
calculates power and a wide range of other measurements useful in
determining harmonic distortion levels and sources. The Tester can display
power calculations in either a single-phase or a 3-phase readout.
These capabilities allow you to monitor power quality before and after an
installation, troubleshoot a power distribution system, and (with Model 41B)
print out or download data for additional analysis.
The Tester is both a harmonics measurement tool and a power meter or
digital multimeter. You can use the Tester to measure voltage events
(undervoltage, overvoltage, line outages, and neutral to ground levels),
current levels, or to measure power levels. Fundamental frequency
measurements (to 100 Hz) and harmonic frequency measurements (to about 2
kHz) are also possible.
The Tester cannot measure frequencies above about 2 kHz. (Use the
ScopeMeter test tool to measure fast power transients.)
1
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39/41B
Users Manual
Unpacking
The following items are included in your tester kit (see Figure 1):
•
•
•
•
•
Model 39 Power Meter or Model 41B Power Harmonics Analyzer
80i-500s AC Current Probe
TL-24 Test Leads
TP-20 Test Probes
AC-20 Test Clips
Your kit also includes the following printed materials:
•
•
•
Users Manual (this book)
Quick Reference Guide
Warranty Registration Card
For Model 41B only, the following additional items are included. Refer to
Figure 2.
•
•
RS-232 Serial Cable
FlukeView 41 Windows Software Disk
Check the contents of the box for completeness, noting any damage. If
something in the kit has been damaged or is missing, contact the supplier
immediately.
2
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Unpacking
TL-24
Test Leads
(Set of two. Red and Black)
80i-500s
AC Current
Probe
AC-20
Test Clip
TP-20
Test Probe
POWER HARMONICS
ANALYZER
41
®
a2f.eps
Figure 1. Tester and Accessories
3
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39/41B
Users Manual
RS-232 Cable
Companion Software
3.5-Inch Floppy Disks (FlukeView 41)
a3f.eps
Figure 2. Additional Items (Model 41B)
4
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Terminology Used in This Manual
Terminology Used in This Manual
This manual uses the following standard terminology:
•
•
•
•
•
•
•
“Mains” is line voltage or frequency.
“φ1”, “φ2”, and “φ3” refer to the three current supply phases.
“Delta”
“Wye”
.
.
“N” is Neutral.
is Earth ground.
“AC Current Probe” or “Probe” refers to the 80i-500s, which can also be
called a “current clamp”.
5
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39/41B
Users Manual
Battery Considerations
New alkaline C cells typically provide more than 48 hours of continuous
operation. You can also use NiCad batteries. However, depending on battery
condition, fully charged NiCad batteries provide 16 hours or less of
continuous operation.
Plan to replace the batteries as soon as possible after the symbol comes on.
Refer to User Maintenance later in this manual for battery changing
instructions.
Note
After the Tester is dropped, it may not turn on. Check the batteries
to see if they are misaligned or damaged. Reseat the batteries if they
are misaligned; replace the batteries if they are damaged.
Memory Retention
Whenever you remove power from the Tester (pressing off, letting the
batteries run down, removing the batteries, or experiencing an automatic
power down), the Tester retains all essential operating information in
nonvolatile memory. Specifically, the Tester retains calibration accuracy,
power-up configuration information, and any stored waveforms (Model 41B).
However, if you remove power when Record is active, the Tester loses all
recorded values.
Automatic Power Down
If you do not press any keys for approximately 15 minutes, the Tester
normally powers down automatically. If Record is active, the Tester continues
to operate unattended as long as the battery condition allows.
The Tester returns to its power-up configuration whenever you turn it on.
If the Tester encounters a memory error at power-up, it automatically turns
itself off. Check the batteries and try turning the Tester on again. If this
problem persists, contact a Fluke Service Center.
6
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Getting Acquainted with Your Tester
Getting Acquainted with Your Tester
While referring to Figure 3, perform the following key presses to familiarize
yourself with basic tester operations.
1.
2.
to turn the Tester on.
(brief press) and
or
to change screen contrast.
(hold 1 second) to turn the backlight on or off.
3.
to select a measurement function (Volts, Amps, Watts).
4.
5.
to select a screen mode (Waveform, Harmonics, Text ).
to start recording measurements
or
to select NOW, MAX, AVG, MINrecording.
to select a different measurement function while recording.
to exit recording.
6.
to turn the Tester off.
7
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39/41B
Users Manual
®
41
POWER HARMONICS
ANALYZER
6
1
3
5
2
4
a4f.eps
Figure 3. Getting Acquainted
8
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Input Connections
Input Connections
Refer to Figure 4 for a view of the two-input measurement scheme. To
measure voltage, insert the red test lead in “V” and the black test lead in
“COM.” Current measurement uses a BNC connector attached to “CURRENT
PROBE.” Connect “V” and “COM” to measure only voltage; connect
“CURRENT PROBE” to measure only current. Make all three connections for
power measurements.
Observe the following connection guidelines:
•
Current
Clamp the Current Probe around the desired phase or neutral conductor.
Make sure the arrow on the probe points toward the load (phase) or the
source (neutral). The Tester is set up for use with an 80i-500s Current
Probe. If you use another probe, you must make a selection change in the
Configuration Screen.
•
•
Voltage: 3-phase, 4-Wire
Connect the red test lead to the desired phase voltage; connect the black
test lead to neutral.
Voltage: 3-phase, 3-Wire, example
Connect the red test lead to the phase conductor used by the Current
Probe; connect the black test lead to another phase.
Using the Voltage Test Leads
The TL-24 Test Lead and AC-20 Test Clip combination (Figure 1), which
allows for hands-free voltage measurements, is preferred when you are also
using the Current Probe.
Note
Figure 4 shows suggested test lead and current probe usage.
9
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39/41B
Users Manual
Using the Current Probe
The accuracy of current and power readings depends on properly using the
80i-500s Current Probe. The accuracy specifications in this manual assume
that the Current Probe is used correctly.
•
Always clamp the 80i-500s Current Probe with the arrow pointing toward
the load (away from the source) for a phase measurement or toward the
source for a neutral measurement. Press
to verify the Current Probe
orientation. If the resulting VA Check Screen generally extends from the
lower left to the upper right of the screen, the Current Probe is connected
properly.
•
•
Always clamp the Current Probe around a single conductor or parallel
conductors that are carrying current for the same phase.
Always center the conductor in the Current Probe alignment marks.
Line
Red
Load
Black
POWER HARMONICS
ANALYZER
41
®
N
a5f.eps
Figure 4. Measurement Connections (1
)
10
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Three-Phase Power Measurements
Three-Phase Power Measurements
Refer to Figures 5, 6, and 7 for various ways to measure total power in a
three-phase system. The W3 3C display screen shows the three-phase
calculation for the connection shown in Figure 5. All other screens and
functions show only single-phase data.
Load
φ1
φ2
Red
Black
POWER HARMONICS
ANALYZER
41
®
W1
φ3
a74f.eps
Figure 5. Three-Phase Measurement Connections (For Balanced Circuits,
, 3-Conductor,
3
)
11
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39/41B
Users Manual
Load
φ1
Red
φ2
Black
POWER HARMONICS
ANALYZER
41
®
W1
φ3
Red
Wtotal = W1 + W2
POWER HARMONICS
ANALYZER
41
®
W2
W1 + W2
PF =
3
(VA1 + VA2)/2
a6f.eps
Figure 6. Three-Phase Measurement, Balanced or Unbalanced
Connections (3 , 3-Conductor, or
)
12
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Three-Phase Power Measurements
φ1
Red
POWER HARMONICS
ANALYZER
41B
®
W1
φ2
Red
Load
Black
POWER HARMONICS
ANALYZER
41B
®
W2
φ3
Red
Black
Black
N
POWER HARMONICS
ANALYZER
41B
®
Wtotal = W1 + W2 + W3
W3
a7f.eps
Figure 7. Three-Phase Measurement, Balanced or Unbalanced
Connections (3 , 4-Conductor)
13
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39/41B
Users Manual
Keypad
Refer to Figure 8 and Table 1 for keypad operation.
1
2
3
4
5
14
13
12
6
7
11
10
9
8
a8f.eps
Figure 8. Keypad
14
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Keypad
Table 1. Key Descriptions
Name & Description
Number
Symbol
1
Power
Press once to turn the Tester on; a test pattern is
displayed briefly. (Test pattern remains displayed
while key is held pressed.) Press again to turn
the Tester off. The Tester sets up to the power-
up configuration each time you turn it on.
Arrow Keys
2
3
These keys have multiple uses. Refer to other
areas for specific
and
descriptions.
Contrast/Backlight
Tap briefly to adjust contrast (with
);
tap again to store setting and return to normal
operation. Press and hold
for about 1 second
to turn the backlight on or off.
4
Screen Mode
M
Press to cycle the Tester through Waveform,
Harmonics, and Text Screen Modes. You select
the Measurement Function (Volts, Amps, or
Watts) independently of the Screen Mode.
15
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39/41B
Users Manual
Table 1. Key Descriptions (cont)
Symbol Name & Description
Range (Waveform and Text)
Number
5
Press
momentarily to start manual ranging
(MAN) for all Measurement Functions (V, A, W).
Continue momentary presses to cycle through
the ranges for the selected Measurement
Function only. (Ranges do not change for the
other two Measurement Functions.) Press and
hold about 1 second to return to autoranging
(AUTO) for all Measurement Functions (V, A, W).
The Tester always begins autoranging at power-
up.
Range (Harmonics)
Press
momentarily to cycle from 100% to
10%, 20%, 50%, and back to 100%. Other
harmonics screen ranges and voltage or current
measurement ranges do not change while in
harmonics display.
6
7
VA Check
Press at any time for a check of the volts versus
amps signature at the test point. Press
second time to return to normal operation. See
also “VA Check” section.
a
Memory (Model 41B)
Press to access the Waveform Storage Screen.
Press
operation. Also, you can clear all stored
waveforms by holding pressed as you
on. See also “Storing and Recalling
a second time to return to normal
press
Measurements.”
16
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Keypad
Table 1. Key Descriptions (cont)
Symbol Name & Description
Phase Reference
Number
8
Press to select volts or amps as the display
phase reference. Voltage reference is the
standard configuration. For current only
measurements, press
to set
. To
change the power-up phase reference, see
“Power-Up Configuration” later in this manual.
9
Send (Model 41B)
Press to print a test report of calculated
measurements to a printer or PC. (The Tester
displays SEND.) Do not press
when
FlukeView 41 application software is in use. See
“Sending to a PC”.
10
Smooth
Smooth allows you to average waveforms,
resulting in a more stable screen and increased
accuracy of computations. (See “Specifications.”)
Press
Smooth selections (
20s in the top status line). Pressing
fifth time returns the Tester to normal operation.
four times to step through the
2s, 5s, 10s,
a
17
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39/41B
Users Manual
Table 1. Key Descriptions (cont)
Symbol Name & Description
Number
11
Print (Model 41B)
Press to print a screen dump to a printer. (The
Tester displays
key. Do not press
.) To stop printing, press any
when FlukeView 41
application software is in use. See “Sending to a
PC”.
12
13
Record
Press to start Record. Press
to resume normal operation. You can also return
the Tester to its standard (factory-programmed)
a second time
configuration by holding
as you press on
.
Hold
Press
to freeze the screen. ( appears in
the top line.) You can now observe all screens for
a single measurement. Press
resume normal operation.
again to
serves as the “ENTER” key when used with
some other screens. Also, you can access the
Power-Up Configuration Screen by pressing
as you press
on.
14
Measurement Function
F
Press to cycle the Tester through Volts, Amps,
and Watts Measurement Functions. You select the
Screen Mode (Waveform, Harmonic, or Text)
independently of the Measurement Function.
18
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Display Screen
Display Screen
The screen consists of the following three areas (see Figure 9):
•
•
Status Line: identifies Tester operating conditions. See Table 2.
Measurement Area: shows information as waveform, harmonics bar
chart, or set of text computations. Refer to Table 3 for abbreviations used
in all Measurement Functions and Screen Modes.
•
Special Messages. See Table 4.
Measurement Area
(see Table 3)
Status Line (see Table 2)
Cursor Data
Special Screen Messages
(see Table 4)
>30V rms Input or in Hold (
)
Low Battery Condition
a9c.eps
Figure 9. Display Screen
19
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39/41B
Users Manual
Table 2. Status Line
Hold active (screen frozen). appears in lower left screen
to indicate possible high voltage input that is not sensed
during Hold.
Phase Reference Selection. The volts input or the current
input is the reference for determining phase shift. Select
when measuring current only with voltage test leads not
connected.
2s
5s
Smooth Selection. Smooth is active with averaging times of
2, 5, 10, or 20 seconds. A higher number signifies a more
stable measurement reading.
10s
20s
OL-V
Volts Overload Condition for the selected range (over 600V
if in AUTO).
OL-A
Amps Overload Condition for the selected range (exceeds
2V peak if in AUTO). Since the input from the Current Probe
is 1 mV/A, maximum current input is 2000A pk.
OL-VA
Both volts and amps maximum inputs have been exceeded.
Note
When an overload occurs, all measurement and computation data
must be presumed invalid.
AUTO
The Tester switches range automatically to deal with
changing volts, amps, or watts readings.
MAN
Tester does not switch ranges automatically.
Memory location (X) last accessed. (X = 1 to 8)
Send is active (prints test reports, Model 41B.)
Print is active (prints screen dumps, Model 41B.)
MEMX
SEND
PRNT
20
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Display Screen
Table 3. Screen Abbreviations
Name and Description
Phase Angle degrees. ( 180°)
Screen Usage
°
Measures time from the positive zero crossing of the
fundamental of the selected volts or amp REF. 360°
represents one cycle at the fundamental or selected
harmonic frequency. A positive sign indicates that the
positive zero crossing of the measured cycle comes
earlier than (leads) that of the reference.
Note
For the Watts
screen, the phase angle always shows the
relation of Amps to the Volts REF at the same frequency. Cosφ
calculations are based on this definition.
A RMS
Amps RMS (includes dc component if using dc capable
current probe).
A PK
A DC
A HM
Peak Amps (1/2 peak-to-peak value).
Amps DC.
For a current waveform, A HM identifies the total
harmonic current present.
A LEAD
A LAG
CF
Amps Lead Volts
Evidence of capacitive reactance in the system; the
current waveform precedes the voltage waveform.
Amps Lag Volts
Evidence of inductive reactance in the system; the
current waveform occurs after the voltage waveform.
Crest Factor
Ratio of a waveform’s peak value to its rms value.
21
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39/41B
Users Manual
Table 3. Screen Abbreviations (cont)
Name and Description
Screen Usage
DPF
Displacement Power Factor cosφ fundamental
The ratio of the active power (W) to the apparent power
(VA rms) at the fundamental frequency. Equivalent to
cosφ at that frequency. Traditional power factor for linear
loads.
HZ
KF
Waveform Screens: Fundamental frequency in hertz
Harmonics Screens: Frequency of selected harmonic in
hertz
K-Factor
A load current waveform rating calculation that rates the
waveform’s capability to produce harmonic-related heat
loss in transformers and other magnetic components.
Used to select transformer K-ratings that match load
current K-factor measurements.
PF
Power Factor
Ratio of active power to apparent power (including all
harmonics).True power factor for all loads, linear and
non-linear.
% THD-F
Total Harmonic Distortion (as % of Fundamental)
Defines amount of harmonic distortion as a percentage
of the waveform at the fundamental frequency.
% THD - F = rms of harmonics (less fundamental)
rms of fundamental
% THD-R
Total Harmonic Distortion (as % of rms total)
Defines amount of harmonic distortion as a percentage
of the rms value of waveforms at all frequencies
(fundamental and harmonics).
% THD - R = rms of harmonics (less fundamental)
total rms
22
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Display Screen
Table 3. Screen Abbreviations (cont)
Name and Description
Screen Usage
V RMS
Volts rms (includes dc component).
COS
Cosine of the angle between the voltage and the current
at any single frequency.
V PK
V DC
V HM
Peak Volts (1/2 peak-to-peak value).
Volts DC.
Harmonic Volts RMS
For a voltage waveform, V HMidentifies the total
harmonic voltage present.
VA, KVA
(Kilo) Volt Amps
Apparent power: a value that the Tester calculates by
multiplying the rms value for current by the rms value for
voltage.
VAR, KVAR
(Kilo) Volt Amps Reactive
The reactive power component of the fundamental
frequency.
W, KW
Active Power
The average power dissipated (also called real power).
23
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39/41B
Users Manual
Table 4. Special Messages
<CONTRAST>
Press
or
to adjust contrast. Press
to exit contrast control and
store current setting.
* CALIBRATION ERROR *
CONTACT FLUKE SERVICE
The Tester has detected a calibration error at power-up. Since erroneous
readings result, the Tester displays this message until calibration is verified.
Return the Tester to a Service Center for repair or calibration. See “User
Maintenance” later in this manual.
STOP AVG AT 48 HOURS
In Record, averaging stops after 48 hours. Note the average value shown;
then, press
once to return to normal operation or twice to begin
recording with new values.
* PRINTING *
PRESS ANY KEY TO STOP
On Model 41B, this message appears when you press
any key to resume normal operation.
or
. Press
24
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Functions and Screen Modes
F M
Functions and Screen Modes
The Tester uses a set of multipurpose screens to present each type of
measurement (volts, amps, watts) as a waveform, a relational bar chart of
harmonics, or a series of digital (text) readouts. With multiple values and
computations on each screen, you only need to press a few keys to see
everything there is to know about power (or just voltage or current) at the test
point. Cycle through the choices by pressing either (or both) of these keys.
The Tester preserves selections that are active in one screen as you switch to
another screen. For example, if you are measuring harmonic in the Volts
Harmonic Screen and change function, the Tester continues measuring
harmonic in the amps and watts harmonic screens.
Waveform Screen Mode
Volts, amps, and watts waveform screens (Figure 10) use a common format to
present information about the measurement inputs. This format shows digital
information on top and a waveform on the bottom. The waveform vertical
scale limits usually change automatically (AUTOon) to accommodate the
magnitude of the input. The horizontal scale represents 0 through 360 degrees
(one cycle) of the fundamental frequency.
With a waveform screen displayed, press
or
to activate the
vertical cursor bar. Continue to press these keys to position the cursor along
the horizontal degree scale. A second line of digital information defines the
magnitude and phase for the point where the cursor bar intersects the
waveform.
Note
In the waveform screens, the frequency displayed is the frequency of
the fundamental. This is normally true even when the signal being
measured contains an individual harmonic with an amplitude
greater than the fundamental (such as the third harmonic in the
neutral current of a 3 , 4-wire system supplying non-linear loads).
To obtain the frequency of a harmonic, select the harmonic screen
and use
and
to position the cursor arrow under the
harmonic of interest.
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Users Manual
a10c.eps
Figure 10. Waveform Screens
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Functions and Screen Modes
Harmonics Screen Mode
The Harmonics Screen Mode (Figure 11) uses a set of screens to display
magnitude bars for all harmonics and digital information about the selected
harmonic. Select a harmonic by pressing
along the bottom scale. DC, (the fundamental frequency), and harmonics
through appear on the first screen. Harmonics through appear on
the second screen. Switch between harmonics screens by pressing
when is selected on the first screen or when is selected on the
second screen.
and
to move the cursor
At the top of the screen, the percentage shown compares the selected cursor
magnitude to either the fundamental (%F) or the total rms value (%R)
(fundamental and all harmonics). The Tester also shows the magnitude of the
cursor selection. The frequency of the selected harmonic is shown in Hertz
below the percentage.
Note
The watts harmonic screen always uses the %F (fundamental) definition.
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Users Manual
a12c.eps
Figure 11. Harmonics Screens
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Functions and Screen Modes
The harmonics overload screen (Figure 12) appears if either of the following
conditions exists:
•
There is no input on the phase reference channel. For example, there is
no voltage input when is selected.
•
There is no input on one of the measurement channels (volts or amps).
a11s.eps
Figure 12. Harmonics Overload Screen
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Users Manual
Harmonics Zoom Mode
Use
to scale a selected harmonic bar graph display (Figure 13) to more
easily read the harmonic information. This mode automatically scales the bar
graph display to 100%, 50%, 20%, or 10% based on the largest harmonic
value; the magnitude of the fundamental is ignored. Using
in harmonic
screens affects the display only and does not affect measurement range
control. To change measurement ranges, the display must be in waveform or
text screens.
An arrow at the top of the bar indicates that the harmonic has exceeded its
scale. The percent of harmonic and digital values are correct even when the
harmonic bar exceeds its scale.
The cursor selection displays the percent of the harmonic and its value in
digital form.
a84s.eps
Figure 13. Harmonics Zoom Screen
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Functions and Screen Modes
Text Screen Mode
Text screens (Figure 14) present digital information for values measured or
computed by the Tester. Arrows appear on the primary text screen signifying
that you can press
to access a secondary text screen. In watts, the
primary screen shows the single-phase (1φ) power reading. The secondary
(3φ, 3C) screen shows the estimates of the total three-phase performance from
one single-phase reading.
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a13c.eps
Figure 14. Text Screens
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VA Check Screen
VA Check Screen
Press
at any time to access the VA Check screen, which displays volts
graphed against amps. Press
a second time to exit the VA Check screen
and return to your starting point.
With the VA Check screen, the Tester displays one cycle of the fundamental
frequency (current on the vertical scale, voltage on the horizontal scale). The
resulting graph can appear as a straight line, a stepped line, an ellipsoid, or as
some other pattern that you would normally expect to see on an oscilloscope
with two input channels.
Use the VA Check screen to show the phase shift of the fundamental
frequency and detect the existence and severity of nonlinearity caused by
harmonics. It could be that the VA Check screen may simply show that you
have clamped the Current Probe in the wrong direction. Figure 15 shows
some typical VA Check signatures.
When the Tester is set for autoranging (AUTO), ranges for the vertical and
horizontal scales on the VA Check screen are adjusted automatically to
provide a meaningful display. If the Tester is set for manual ranging (MAN),
both scales (ranges) are fixed; you may have to choose AUTO(press
for
1 second) or select an appropriate manual range in either V or A, or both
functions (i.e., press
briefly for each range change).
Note
V or A ranges cannot be changed while in the VA Check screen.
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Users Manual
A linear load with no phase shift.
A linear load with phase shift. A narrow ellipsoid in
this pattern usually does not mean there is a
problem. For wider ellipsoids, check power factor
(PF). If the ellipsoid is backwards (upper left to
lower right), check that you have pointed the
current probe in the right direction.
A nonlinear load, usually resulting from pulse-type
power supplies.
A nonlinear load resulting from a 3-phase (six
pulse) rectifier power supply.
A linear load that is 180 degrees out of phase. A
Current Probe pointed in the wrong direction or
reversed polarity voltage leads can cause this
indication. This incorrect alignment will also cause
negative power readings.
A combination of harmonic content and phase shift
of the fundamental frequency.
A pattern indicative of a silicon-controlled rectifier
(SCR) power supply.
a14c.eps
Figure 15. Typical VA Check Signatures
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Recording Measurements
Recording Measurements
Press
press
to begin recording readings for all measurement functions. Then
or to cycle through the screens for the function presently
selected. You can also switch between measurement functions while in
Record mode. (See Figure 16 for an overview of possible record screens.) For
any function, the Tester displays screens in the following order:
• NOW
The present readings. This screen always appears first when you
start Record.
• MAX
• AVG
The maximum values measured since you started Record.
The averages of values measured since you started
Record. (Average values stop updating after 48 hours of
continuous record operation.)
• MIN
The minimum values measured since you started Record.
When in Record, only the following keys are active:
F
Press
a second time to exit Record. This action discards all recorded
values and returns to the previous measurement screen. The Tester begins
storing a new set of values each time you start Record.
The Tester loses recorded values if the batteries discharge too much. If
comes on during Record, write down any values of interest. (You have ample
time to do this with alkaline batteries. NiCad batteries discharge much more
rapidly once comes on.) Changing the battery erases the Record memory.
You can access 12 different record screens: NOW, MAX, AVG, and MINfor
volts, amps, and watts measurement functions. Figure 16 presents an
overview of the record measurements and computations available by function.
Note
The Record mode acquires only single-phase data approximately
every 500 ms (0.5s). It is not intended to capture transients, nor is it
able to capture single events on the power line.
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Users Manual
V
A
W
a15c.eps
Figure 16. Record Screens
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Power-Up Configuration
+
Power-Up Configuration
The Tester has two types of configurations: standard and power-up. The
standard configuration, which is programmed into the Tester and can always
be retrieved, includes the following settings:
• FCN V
Volts Function selected.
• DISP WAVE Waveform Screen Mode selected.
• THD %RMS
Total Harmonic Distortion computed as percentage of
the total RMS value.
• CLAMP 80I-500S The 80i-500s Current Probe is selected.
OTHERspecifies any current probe other than the 80i-500s. The Tester
has been calibrated to provide either compensation for the 80i-500s or a
flat response for other probes.
•
REF V Voltage Phase Reference selected.
For Model 41B, KBAUD 9.6is the standard configuration for Print or Send,
and EPSONis the standard configuration. The Tester always selects
autoranging at power-up.
The power-up configuration, which is initially the same as the standard
configuration, can be changed by making entries from the configuration
screen. The Tester sets up to the power-up configuration each time it is turned
on. You can change the power-up configuration using the following
procedure:
1. Press
while pressing to turn the Tester on. The configuration
screen appears. (See Figure 17.)
2. Press
line.
and
to highlight different items on the same line. Press
to select the currently highlighted item and proceed to the next
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39/41B
Users Manual
3. To exit the screen, press
to select a highlighted item on the last line
and store all selections you have made during this configuration session.
The Tester begins normal operation using these selections. The Tester
also automatically sets up to these selections at the next power-up.
To exit the screen without making changes, press
all selection lines.
to cycle through
4. To restore the standard configuration, press
as you press on.
(On Model 41B, this action also clears waveform memory.)
a16c.eps
Figure 17. Configuration Screens
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Storing & Recalling Measurements (Model 41B)
Storing & Recalling Measurements (Model 41B)
Model 41B allows you to store a maximum of eight waveforms (and
associated data) for volts and amps. You can recall data that you have
collected on site for later viewing and analysis. (If you store multiple
waveforms in this manner, you will probably want to keep a written record
identifying the waveforms by number.)
The Tester stores a measurement as digital data. You can recreate all related
waveform, harmonic, and text screen information, except Record, when you
recall the waveform.
The Tester stores waveforms in nonvolatile memory. A low battery condition
or a battery change does not jeopardize the stored waveforms.
Referring to Figure 18, use the following procedure to store and recall
measurements:
1. Press
to access the waveform storage screen. The Tester freezes the
existing waveform and shows the screen in Figure 18.
2. Press
or
to select the desired operation (RECALL, STORE,
or CLEAR). Then press
.
3. Select one of the eight memory locations by pressing
or
to
box one through eight. An underscore appears below a filled memory
location.
a17s.eps
Figure 18. Memory Screen
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39/41B
Users Manual
4. STOREa waveform set (and associated data) into the boxed memory
location by pressing
. If the location was empty, an underscore now
appears below the memory location number. If the underscore already
existed, STOREoverwrites the old waveform.
CLEARthe selected memory location (waveform and associated data)
from the boxed memory location by pressing
RECALLthe selected memory location to view the contents directly by
pressing
.
.
In all three cases, the Tester holds the data represented by the waveform
last seen on the memory screen and returns to the previous display mode.
While Hold is maintained, you can access various representations and
computations about the waveform by selecting different measurement
function and screen mode combinations. You can also send the associated
data to a PC or a printer.
5. Release the memory display and return to the active display mode by
pressing
.
Notes
You can clear all memory locations by holding
you press on.
pressed while
MAX, AVG, and MINinformation in the RECORD mode cannot be
stored in a memory location.
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Using the Serial Cable (Model 41B)
Using the Serial Cable (Model 41B)
Model 41B communicates with a PC or printer (Figure 19) through an
isolated RS-232 port. The Tester outputs data through the RS-232 port when
you press
or
or when you send a command from the PC.
Note
The side of the optical interface connector marked “Optical
Interface RS-232-C” faces up when properly attached to the Model
41B.
Using the Configuration Screen, you can set 1.2, 9.6, or 19.2 KBAUD.
Other parameters are fixed as follows: 1 start bit, 8 data bits, 1 stop bit, and
no parity.
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Users Manual
®
4 1
A N A L Y Z E R
P O W E R H A R M O N I C S
a18f.eps
Figure 19. Serial Communications (Model 41B)
42
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Printing (Model 41B)
Printing (Model 41B)
Pressing
sends data for the present screen to a printer. Printer type
compatibility is selected on the configuration screen as Epsonor HP.
The Tester displays PRNTand the following message appears:
* PRINTING *
PRESS ANY KEY TO STOP
Press any key to abort printing; all keys then return to their normal functions.
Sending to a Printer or PC (Model 41B)
Press
to start outputting calculated results to the printer or PC. Model
41B stops outputting after it has sent a single set of calculated results. At
9600 baud, the Tester requires a few seconds to output a typical set of
calculated values (1120 bytes).
Note
Do not press
or
while printing or using FlukeView 41
software. In either case, pressing
communications.
or
disrupts
Using PC Software with the Tester (Model 41B)
FlukeView 41 software is provided for Windows. Refer to the operating
instructions provided with the software.
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Users Manual
Applications
Warning
To avoid electric shock and/or equipment damage, use
caution when connecting alligator clips to live
components. The jaws of alligator clips can create a short
circuit between closely spaced live parts. Avoid making
connections to feeder conductors or bus bars at elevated
potentials. Whenever possible, make connections to the
output side of a circuit breaker, which can provide better
short circuit protection.
44
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Applications
LIGHTING L.C.
Plant
Switch
Gear
MOTOR L.C.
Adjustable
Frequency
(Speed) Motor
Drive
UTILITY
XFMR
Receptacle
Load Center
Distribution
Transformer
230V
120V
a19f.eps
Figure 20. Typical Applications
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Users Manual
Plant Switch Gear (Service Entrance)
Measure current, load balance, and total harmonic distortion. Refer to Figure
21. Press
to select current (
) for the display phase reference.
POWER HARMONICS
®
ANALYZER
41
®
a20f.eps
Figure 21. Plant Switch Gear
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Applications
Distribution Transformer
Measure Power Factor, K Factor, power, neutral current, neutral frequency,
and load balance between phases. Refer to Figures 22 and 23.
I
2
3
N
1
3
2
POWER HARMONICS
ANALYZER
41B
®
a21f.eps
Figure 22. Distribution Transformer (1 Watts Text Screen)
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Users Manual
I
2
3
N
1
3
2
POWER HARMONICS
ANALYZER
41B
®
a82f.eps
Figure 23. Distribution Transformer (3 , 3C Watts Text Screen)
Electronic Equipment Load Center
Make connections to circuit breakers by first turning the circuit breaker off.
Then connect the alligator clip to the breaker output terminal via a short piece
of insulated wire, refer to Figure 24.
48
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Applications
Measure for excessive current (tripping of circuit breakers) and other general
measurements (such as level of current flow) in each circuit. Measure balance
between phases, neutral current and frequency, and harmonic distortion.
Measure input current, crest factor, and harmonics for PC, copier, printer,
and single phase UPS. Most electronic equipment loads are nonlinear due to
their use of switching-type power supplies.
Black
Red
ON
OFF
POWER HARMONICS
ANALYZER
41B
®
a22f.eps
Figure 24. Receptacle Load Center (Neutral Current Measurement)
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Users Manual
Generator Set
Measure for excessive current, proper frequency (adjust generator speed), and
other general uses. Refer to Figure 25. (Small generator shown.)
POWER HARMONICS
ANALYZER
41B
®
a23f.eps
Figure 25. Generator Set
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Applications
Adjustable Frequency (Speed) Motor Drive
Measure input and output current and current frequency. Refer to Figure 26.
The Tester measures the output current frequency of the drive. (Output
current provides the most stable frequency measurement.) Input power and
harmonic currents can also be measured. Press
the display reference.
to select current
for
OUTPUT
B
INPUT
2
OUTPUT
B
INPUT
2
A
C
1
3
A
C
1
3
OUTPUT
INPUT
IN
OUT
POWER HARMONICS
ANALYZER
41B
®
a24f.eps
Figure 26. Adjustable Frequency Motor Drive
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Users Manual
User Maintenance
Cleaning
Clean your Tester with a damp cloth and a mild detergent. Do not use
abrasives, solvents, or alcohol.
Fuse Replacement
The Tester uses electronically protected inputs; no fuses are required.
Battery Replacement
Warning
To avoid electrical shock, disconnect the voltage test
leads and the current probe before replacing the batteries.
The Tester must be disconnected from all sources before
you can open it for any adjustment, battery replacement,
maintenance, or repair.
The Tester uses four alkaline C cells (supplied). You can also use four
rechargeable NiCad batteries, which you must supply. (The Tester does not
provide for internal recharging.)
Note
N T
Used Nickel-Cadmium batteries should be disposed of by a qualified
recycler or hazardous materials handler. Contact your authorized
Fluke Service Center for recycling information.
Referring to Figure 27, use the following procedure to replace the batteries:
1. Press off.
2. Disconnect the voltage test leads and the Current Probe at the test points
(first) and at the Tester (second).
3. Place the Tester face down on a nonabrasive surface. Loosen the two
screws with a flat-blade screwdriver.
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User Maintenance
4. Lift the battery access lid away from the Tester.
5. Replace the C cells (alkaline or recharged NiCad) as shown in Figure 24.
Observe the battery polarity shown in the battery compartment.
6. Secure the battery access lid back in position with the two screws.
a25f.eps
Figure 27. Battery Replacement
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Users Manual
Operational Test
Use any of the applications shown in this manual to verify volts, amps, and
watts measurability. For a full operational test, refer to the Service Manual
(P/N 601044).
If the Screen Flashes or is Blank at Power-Up
If the screen flashes or is blank at power-up, it may be caused by a low
contrast setting. If neither or the following procedures works, refer to “If Your
Tester Does Not Work” for instructions on returning the unit for repair.
If the instrument flashes a dark test pattern and then appears blank:
Tap , then hold
down for several seconds. A normal screen display
should appear. Adjust to the desired contrast, then tap again to store the
setting.
If the screen is blank (no dark flash):
Check the batteries. If the batteries read below 1.1V, replace them. If the
screen is still blank, refer to “If Your Tester Does Not Work” for instructions
on returning the unit.
If Your Tester Does Not Work
If your Tester does not work, make the following basic checks:
•
Examine the case for physical damage. If you detect damage, contact a
Fluke Service Center. (Refer to the list of service centers at the end of this
manual.)
•
•
Are you testing a live circuit? Test on a known-live circuit.
Check the batteries, test leads, and Current Probe. If necessary, replace
any of these items.
•
•
Review applicable parts of this manual to make sure you are operating
the Tester correctly.
When measuring current without the voltage test leads connected, you
must select A for the phase reference (see Table 1).
54
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Accessories and Replacement Parts
If the Tester still does not work, pack it securely and forward it, postage paid,
to the nearest Service Center. Include a description of the problem. Fluke
assumes no responsibility for damage in transit.
At its option, Fluke will repair or replace a Tester under warranty. The Tester
will be returned at no charge. Refer to the Warranty Card for warranty terms.
If the warranty has lapsed, Fluke will repair and return the Tester for a fixed
fee. Contact your nearest Service Center for information and prices.
Accessories and Replacement Parts
Service Manual
The part number for the Service Manual is 601044.
Accessories
For a list of standard accessories included with the Tester, see “Unpacking”
earlier in this manual. Optional accessories are as follows:
•
•
80i-1000s
C41s
AC Current Probe
Soft Carrying Case
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Users Manual
Replacement Parts
Parts that can be replaced by the user are shown in Table 5. Refer to the
Service Manual for a complete list of replaceable parts.
Table 5. Replacement Parts
Description
Battery (each, C cell, 4 required
Battery door (with screws)
Hook (tilt stand)
Fluke PN
423582
936807
936810
PM9080
936880
Qty
1
1
1
RS-232 Serial cable (Model 41B)
1
FlukeView 41 Windows English software (Model
41B)
1
39/41B Users Manual (English)
39/41B Users Manual ( French)
39/41B Users Manual (German)
39/41B Users Manual (Spanish)
39/41B Users Manual (Italian
SW41 FlukeView Application Users Manual
Quick Reference Guide, Fluke 39/41B
Service Manual, Fluke 39/41B
80i-500s AC Current Probe
482287200916
482287200918
482287200917
482287200921
482287200919
600855
1
1
1
1
1
1
1
1
1
1
1
1
-
107653
601044
TL24 Test Lead Set
TP 20 Test Probe Set
AC 20 Test Clip Set
80i-1000s AC Current Clamp (Optional)
C41s Carrying Case (Optional)
Use only specified replacement parts.
-
56
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Specifications
Specifications
Basic electrical specifications are defined over the temperature range from
18°C to 28°C for a period of one year after calibration.
Accuracy is specified as ([% of reading] + [number of units in least
significant digit]).
Frequency Range, Fundamental
6-65 Hz and dc
Minimum Input Levels
5V rms or 1A rms
Volts Measurements (True rms)
Input Range: 5.0V to 600V rms (ac + dc)
5.0V to +/-933V peak
Basic Accuracy*:
rms (ac + dc): +/-(0.5% + 2 digits)
peak, dc:
+/-(2% + 3 digits)
* < 15V rms, add 2 digits
Input Impedance: 1 MΩ, balanced
Crest Factor: > 3.0 below 300V, 1.56 @ 600V
Amps Measurements (True rms)
(1 mV/A) Isolated Input
Input Range: 1.00 mV (A) to 1000 mV rms (A) (ac + dc)
1.0 mV (A) to +/- 2000 mV (A) peak
Basic Accuracy:
rms (ac + dc):
peak, dc:
+/-(0.5% + 3 digits) + probe specs.
+/-(2% + 4 digits) + probe specs.
Input Impedance:1 MΩ || 47 pF
Crest Factor:> 3.0 below 600 mV, 2.0 @ 1000 mV
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Watts Measurements (Volt-Amps)
(1 mV/A) Isolated Input
Range: 0 W (VA) to 600 kW (kVA) average
0 W (VA) to 2000 kW (kVA) peak
Accuracy (ac + dc):
Active W (VA): +/-(1% + 4 digits) + probe specs
Harmonics Measurement Accuracy (Cursor Data)
(Harmonic Level > 5% Using Smooth ~20)
Volts:
Fundamental to 13th Harmonic:
13th to 31st Harmonic:
+/- (2% + 2 digits)
13th (+/- (2% + 2 digits)) -----
----- 31st (+/- (8% + 2 digits))
Amps* or Watts:
Fundamental to 13th Harmonic:
13th to 31st Harmonic:
+/- (3% + 3 digits) + probe specs
13th (+/- (3% + 3 digits) + probe
specs) ---------- 31st (+/- (8% + 3
digits)+ probe specs)
* < 20A, add 3 digits
Phase:
Fundamental:
2nd to 31st Harmonic:
(±2 degrees) + probe specs
2nd (±5 degrees) -- 31st (±20
degrees) + probe specs
Frequency Measurement Accuracy
(Fundamental, 6.0 Hz - 99.9 Hz)
6.0 Hz - 99.9 Hz:+/- 0.3 Hz
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Specifications
Other Measurement Specifications
Measurement Function
Range/Resolution
Accuracy
Input Bandwidth: (-0.5 dB): DC 6 Hz to 2.1 kHz
Crest Factor (CF): (Using
Smooth 20)
1.00 to 5.00
4%
Power Factor (PF):
0.00 to 1.00
0.02
Displacement Power
Factor (DPF):
0.00 to 0.29
unspecified
0.04
0.30 to 0.69
0.70 to 0.89
0.03
0.90 to 1.00
0.02
Phase Measurement
Range:
-179 to 180 degrees
K-Factor (KF) Model 41B:
1.0 to 30.0
10%
Total Harmonic Distortion
(THD)
%THD-F:
%THD-R:
0.0 to 799.9
0.0 to 99.9
(0.03 x Reading + 2.0%)
(0.03 x Reading + 2.0%)
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Ranges and Resolution
AC Volts
AC Amps
Watts
Range
(PK)
Resolution
Range
(PK)
Resolution
Range Resolution
(PK)
20V
0.1V
0.1V
0.1V
0.1V
1V
2A
5A
0.01A
0.01A
0.01A
0.01A
0.1A
0.1A
0.1A
1A
50W
1.0W
50V
100W
200W
500W
1 kW
1.0W
100V
200V
500V
1 kV
10A
1.0W
20A
1.0W
50A
0.01 kW
0.01 kW
0.01 kW
0.1 kW
0.1 kW
0.1 kW
1 kW
1V
100A
200A
500A
1000A
2000A
2 kW
5 kW
10 kW
20 kW
50 kW
100 kW
200 kW
500 kW
1 kkW
2 kkW
1A
1A
1 kW
1 kW
1 kW
1 kW
60
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Specifications
General Specifications
Size:
9.2 x 3.9 x 2.5 inches (234 x 100 x 64 mm)
Weight: 2.0 lbs (1 kg)
Input Connectors:
Voltage:
2 shrouded banana jacks (4 mm)
Current Probe: 1 shrouded BNC jack
Battery:
Type:
4 Alkaline “C” Cells ANSI/NEDA-14A, IEC-LR14
(supplied)
Operating Time: 48 hours, typical (continuous, without backlight)
Alternate Battery:
4 NiCad Cells, customer supplied and externally charged. The tester
prevents battery reversal by turning itself off if battery voltage drops below
4.0V dc.
Temperature:
Operating: 0 to 50°C (32 to 122°F)
Storage: -20 to 60°C (-4 to 140°F)
Temperature Coefficient:
0.1 x Specified Accuracy per degree C
(0 to 18 degrees C, 28 to 50 degrees C)
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39/41B
Users Manual
Humidity (noncondensing):
Operating: 0 - 30°C:
90%
30 - 40°C: 75%
40 - 50°C: 45%
Storage:
Altitude:
Operating: 10,000 feet (3 km)
90%
Storage:
40,000 feet (12 km)
Shock & Vibration:
per MIL-T-28800, class 3, sinusoidal, nonoperating
Electro-Magnetic Compatibility:
RF Emissions: EN 50081-1 Commercial Limits,
VFG 243-1991
RF Susceptibility: EN 50082-1 Commercial Limits
Council Directive: Electromagnetic Compatibility Directive (89/336/EEC)
Drip Proof and Dust Proof Case: per IEC 529, Section 3;
IP 52 Dust-Protected, Drip Proof
Display
Type:
Size:
Super Twisted Liquid Crystal
3.0 inch diagonal (76 mm)
Resolution: 160 W x 128 H pixels
Contrast:
Backlight:
User adjustable
Yellow-green LED
62
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Specifications
Safety
Designed for 600V measurements on industrial power distribution circuits.
Overload Protection:
Voltage or Current Probe Input:
Surge Protection:
600V, maximum
6 kV per IEC 1010-1
Maximum Voltage Isolation to Earth: 600V from any terminal
Protection Levels:
IEC 1010-1, Pollution Degree 2, Installation
Category III, Material Group II, 600V
Protection Class:
Protection Class II as described in IEC 1010-1, Annex H (Double or
Reinforced Insulation).
Waveform Memory (Model 41B)
Eight nonvolatile memories store 2048 sampled points of waveform data for
both Voltage and Current inputs for later recall or sending to a computer.
EIA-232-E (RS-232) INTERFACE (Model 41B)
Optically-Isolated, 1.2, 9.6, or 19.2k baud rate.
Printer graphical output in either Epson or HP format. Text data is sent is
ASCII format (SEND). Waveform, Data, and Picture formats may be remotely
accessed. Remote Trigger function.
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Users Manual
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