Iꢀ
Agilent E361xA 60W BENCH SERIES DC POWER SUPPLIES
OPERATING AND SERVICE MANUAL FOR MODELS:
Agilent E3614A, Serials KR83503035 and above
Agilent E3615A, Serials KR83506197 and above
Agilent E3616A, Serials KR83502651 and above
Agilent E3617A, Serials KR83502522 and above
For instruments with higher Serial Numbers than above,
a change page may be included.
Manual Part No. 5959-5310
April 2000
Edition 8
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Table of Contents
SAFETY SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
SAFETY REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
INSTRUMENT AND MANUAL IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
OPTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
ACCESSORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
INITIAL INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Mechanical Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Electrical Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
INSTALLATION DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Location and Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Outline Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
INPUT POWER REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Line Voltage Option Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
TURN-ON CHECKOUT PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
OPERATING MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
LOCAL OPERATING MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Constant Voltage Operaton. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Constant Current Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Overvoltage Protection (OVP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
CONNECTING LOADS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
OPERATION BEYOND RATED OUTPUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
REMOTE OPERATING MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Remote Voltage Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Remote Analog Voltage Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
MULTIPLE-SUPPLY OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
NORMAL PARALLEL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
AUTO-PARALLEL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
NORMAL SERIES OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
AUTO-SERIES OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
AUTO-TRACKING OPERATON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
LOAD CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14
PULSE LOADING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
REVERSE CURRENT LOADING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
OUTPUT CAPACITANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
REVERSE VOLTAGE LOADING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
BATTERY CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
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OPTIONS
GENERAL INFORMATION
Options OE3 and OE9 determine which line voltage is
selected at the factory. The standard unit is configured for 115
Vac 10%. For information about changing the line voltage
setting, see paragraph "INPUT POWER REQUIREMENTS",
page 1-6.
INTRODUCTION
This manual describes all models in the Agilent E361xA 60W
Bench Power Supply family and unless stated otherwise, the
information in this manual applies to all models.
OE3:
OE9:
910:
Input power, 230 Vac 10%, 47-63 Hz
Input power, 100 Vac 10%, 47-63 Hz
One additional manual
SAFETY REQUIREMENTS
This product is a Safety Class I instrument, which means
that it is provided with a protective earth ground terminal.
This terminal must be connected to an ac source that has a
3-wire ground receptacle. Review the instrument rear panel
and this manual for safety markings and instructions before
operating the instrument. Refer to the Safety Summary page
at the beginning of this manual for a summary of general
safety information. Specific safety information is located at
the appropriate places in this manual.
ACCESSORY
The accessory listed below may be ordered from your local
Agilent Technologies Sales Office either with the power sup-
ply or separately. (Refer to the list at the rear of the manual for
address.)
Agilent Part No.Description
5063-9240
Rack Kit for mounting one or two 3 1/2" high
supply in a standard 19" rack
This power supply is designed to comply with the following
safety and EMC(Electromagnetic Compatibility) require-
ments:
The rack mount kit is needed for rack mounting of all models
in the Agilent E361xA power supply because these supplies
have molded feet.
nIEC 348: Safety Requirements for Electronic Measuring
Apparatus
nIEC 1010-1/EN 61010: Safety Requirements for Electrical
Equipment for Measurement, Control, and Laboratory Use
nCSA C22.2 No.231: Safety Requirements for Electrical and
Electronic Measuring and Test Equipment
nUL 1244: Electrical and Electronic Measuring and Testing
Equipment.
DESCRIPTION
This power supply is suitable for either bench or rack
mounted operation. It is a compact, well-regulated, Constant
Voltage/Constant Current supply that will furnish full rated
output voltage at the maximum rated output current or can be
continuously adjusted throughout the output range. The out-
put can be adjusted both locally from the front panel and
remotely by changing the settings of the rear panel switches
(See paragraph "REMOTE OPERATING MODES", page 1-9).
The models in this family offer up to 60 watts of output power,
with voltage up to 60 volts and current up to 6 amps as shown
in Table 1.
nEMC Directive 89/336/EEC: Council Directive entitled
Approximation of the Laws of the Member States relating to
Electromagnetic Compatibility
nEN 55011(1991) Group 1, Class B/CISPR 11: Limits and
nMethods of Radio Interference Characteristics of
nIndustrial, Scientific, and Medical(ISM) Radio-Frequency
Equipment
nEN 50082-1(1991) /
The front panel VOLTAGE control can be used to establish
the voltage limit when the supply is used as a constant cur-
rent source and the CURRENT control can be used to estab-
lish the output current limit when the supply is used as a
constant voltage source. The supply will automatically cross
over from constant voltage to constant current operation and
vice versa if the output current or voltage exceeds these pre-
set limits.
IEC 801-2(1991):Electrostatic Discharge Requirements
IEC 801-3(1984):Radiated Electromagnetic Field
Requirements
IEC 801-4(1988):Electrical Fast Transient/Burst
Requirements
INSTRUMENT AND MANUAL IDENTIFICATION
A serial number identifies your power supply. The serial
number encodes the country of manufacture, the date of the
latest significant design change, and a unique sequential
number. As an illustration, a serial number beginning with
KR306 denotes a power supply built in 1993 (3=1 993,
4=1994, etc), 6th week manufacture in Korea(KR). The
remaining digits of the serial number are a unique, five-digit
number assigned sequentially.
The front panel includes an autoranging (E3614A single-
range) digital voltmeter and a single-range digital ammeter.
Two 3 1/2 digit voltage and current displays accurately show
the output voltage and current respectively. The output rat-
ings for each model are shown in the Specifications and
Operating Characteristics Table.
The OVP/CC SET switch is used to check the OVP trip volt-
age and current control set value. When pressing this switch,
the voltage display indicates the OVP trip voltage and the cur-
rent display indicates the current control set value.
If the serial number on your supply differs from that shown
on the title page of this manual,
a
yellow MANUAL
CHANGES sheet is supplied with this manual to explain
the difference between your instrument and the instrument
described by this manual. The change sheet may also con-
tain information for correcting errors in the manual.
The power supply has both front and rear output terminals.
Either the positive or negative output terminal may be
1-4
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be grounded or the power supply can be operated float-
ing at up to a maximum of 240 Volts off ground. Total out-
put voltage to ground must not exceed 240 Vdc.
SPECIFICATIONS
Detailed specifications for the power supply are given in Table
1. All specifications are at front terminals with a resistive load,
and local sensing unless otherwise stated. Operating charac-
teristics provide useful, but non-warranted information in the
form of the nominal performance.
LINE FUSE
Line Voltage
100/115 Vac
230 Vac
Fuse
2.0 AT
1.0 AT
Agilent Part No.
2110-0702
2110-0457
Table 1. Specifications and Operating Characteristics
*STABILITY (OUTPUT DRIFT)
*AC INPUT
An internal switch permits operation from 100, 115, or 230 Vac
lines.
Maximum change in output for an 8 hours following a 30 minute
warm-up under constant line, load and ambient temperature.
Constant Voltage: Less than 0.1% plus 5 mV
100 Vac ± 10%, 47-63 Hz, 163 VA, 125 W
115 Vac ± 10%, 47-63 Hz, 163 VA, 125 W
230 Vac ± 10%, 47-63 Hz, 163 VA, 125 W
Constant Current: Less than 0.1% plus 10 mA
LOAD TRANSIENT RESPONSE TIME
DC OUTPUT
Less than 50 µsec for output recovery to within 15 mV following a
change in output current from full load to half load, or vice versa.
Voltage and current can be programmed via front panel control or
remote analog control over the following ranges;
E3614A: 0 - 8 V, 0 - 6 A
METER ACCURACY:B±(0.5% of output + 2 counts)Bat
o
o
E3615A: 0 - 20 V, 0 - 3 A
E3616A: 0 - 35 V, 0 - 1.7 A
25 C ± 5 C
E3617A: 0 - 60 V, 0 - 1 A
METER (PROGRAMMING) RESOLUTION
Voltage: E3614A 10 mV
E3615A 10 mV (0 to 20 V), 100 mV (above 20 V)
E3616A 10 mV (0 to 20 V), 100 mV (above 20 V)
E3617A 10 mV (0 to 20 V), 100 mV (above 20 V)
Current: E3614A 10 mA
*OUTPUT TERMINALS
The output terminals are provided on the front and rear panel.
They are isolated from the chassis and either the positive or neg-
ative terminal may be connected to the ground terminal.
E3615A 10 mA
E3616A 1 mA
E3617A 1 mA
LOAD REGULATION
Constant Voltage - Less than 0.01% plus 2 mV for a full load to no
load change in output current.
Constant Current - Less than 0.01% plus 250 µA for a zero to
maximum change in output voltage.
*OVERLOAD PROTECTION
A continuously acting constant current circuit protects the power
supply for all overloads including a direct short placed across the
terminals in constant voltage operation. The constant voltage cir-
cuit limits the output voltage in the constant current mode of oper-
ation.
LINE REGULATION
Constant Voltage - Less than 0.01% plus 2 mV for any line volt-
age change within the input rating.
Constant Current - Less than 0.01% plus 250 µA for any line volt-
age change within the input rating.
*OVERVOLTAGE PROTECTION
Trip voltage adjustable via front panel control.
PARD (Ripple and Noise)
Constant Voltage: Less than 200 µV rms and 1 mV p-p
(20 Hz-20 MHz).
Constant Current: E3614A: Less than 5 mA rms
E3615A: Less than 2 mA rms
E3614A
Range: 2.5-10 V 2.5-23 V
E3615A
E3616A
2.5-39 V
E3617A
5-65 V
Margin: Minimum setting above output voltage to avoid
false tripping: 4% of output + 2 V for all models
E3616A: Less than 500 µA rms
E3617A: Less than 500 µA rms
*REMOTE ANALOG VOLTAGE PROGRAMMING (25 ± 5oC)
Remotely varied voltage from 0 to 10 V provides zero to maxi-
mum rated output voltage or current.
Voltage: Linearity 0.5% Current: Linearity 0.5%
The programming inputs are protected against input voltages up
to ±40 V.
OPERATING TEMPERATURE RANGE
o
0 to 40 C for full rated output. Maximum current is derated 1%
o
o
per degree C at 40 C-55 C.
*TEMPERATURE COEFFICIENT
REMOTE SENSING
o
Maximum change in output per C after a 30-minute warm-up.
Meets load-regulation specification when correcting for load-lead
drops of up to 0.5 V per lead with sense wire resistance of less
than 0.5 ohms per sense lead and lead lengths of less than 5
meters.
Constant Voltage: Less than 0.02% plus 500 µV.
Constant Current: E3614A: Less than 0.02% plus 3 mA
E3615A: Less than 0.02% plus 1.5 mA
E3616A: Less than 0.02% plus 1 mA
E3617A: Less than 0.02% plus 0.5 mA
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Table 1. Specifications and Operating Characteristics (Cont’d)
*REMOTE PROGRAMMING SPEED
DC ISOLATION
Maximum time required for output voltage to change from initial
value to within a tolerance band (0.1%) of the newly programmed
value following the onset of a step change in the programming
input voltage.
± 240 Vdc maximum between either output terminal and earth
ground including the output voltage.
*COOLING: Convection cooling is employed.
*WEIGHT: 12.1 lbs/5.5 Kg net, 14.9 lbs/6.75 Kg shipping.
* Operating Characteristics
Full load
3 msec
No load
2 msec
6 msec
85 msec
200 msec
1.6 sec
2.2 sec
1.8 sec
3.2 sec
Up:
E3614A:
E3615A:
E3616A:
E3617A:
9 msec
85 msec
200 msec
7 msec
13 msec
65 msec
200 msec
Down: E3614A:
E3615A:
E3616A:
E3617A:
instructions.
INSTALLATION
INITIAL INSPECTION
Before shipment, this instrument was inspected and found to be
free of mechanical and electrical defects. As soon as the instru-
ment is unpacked, inspect for any damage that may have
occurred in transit. Save all packing materials until the inspection
is completed. If damage is found, a claim should be filed with the
carrier. The Agilent Technologies Sales and Service office should
be notified.
Mechanical Check
This check should confirm that there are no broken knobs or connec-
tors, that the cabinet and panel surfaces are free of dents and
scratches, and that the meter is not scratched or cracked.
Electrical Check
The instrument should be checked against its electrical specifi-
cations. Paragraph "TURN-ON CHECKOUT PROCEDURE" con-
tains a brief checkout procedure and "PERFORMANCE TEST" in
section SERVICE INFORMATION includes an instrument perfor-
mance check to verify proper instrument operation.
Figure 1. Outline Diagram
INPUT POWER REQUIREMENTS
This power supply may be operated from nominal 100, 115, or
230 Vac 47-63 Hertz power source. A label on the rear panel
shows the nominal input voltage set for the unit at the factory. If
necessary, you can convert the supply to another nominal input
voltage by following the instructions below
INSTALLATION DATA
The instrument is shipped ready for bench operation. It is neces-
sary only to connect the instrument to a source of power and it is
ready for operation.
Line Voltage Option Conversion
Location and Cooling
Line voltage conversion is accomplished by adjusting two compo-
nents: the line select switch and the rear panel fuse F1. To con-
vert the supply from one line voltage option to another, proceed
as follows:
This instrument is air cooled. Sufficient space should be allowed so
that a free flow of cooling air can reach the sides and rear of the
instrument when it is in operation. It should be used in an area where
o
the ambient temperature does not exceed 40 C. Maximum current is
o
o
o
derated 1% per C at 40 C-55 C.
a. Disconnect power cord.
b. Turn off the supply and remove the top cover by lifting the
cover upwards after taking it off from both sides of the chassis
by inserting a flat-blade screwdriver into the gap on the lower
rear portion of the cover.
Outline Diagram
Figure 1 is a outline diagram showing the dimensions of the
instrument.
Rack Mounting
c. Set two sections of the line voltage selector switch on the PC
board for the desired line voltage (see Figure 2).
d. Check the rating of the fuse F1 installed in the rear panel fuse
holder and replace with the correct fuse if necessary. For 100
and 115 V operation, use a normal blow 2 A fuse and for 230
V use a time delay 1 A fuse.
This instrument may be rack mounted in a standard 19-inch rack
panel either by itself or alongside a similar unit. Please see
ACCESSORY, page 1-4, for available rack mounting accesso-
ries. Each rack-mounting kit includes complete installation
1-6
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e. Replace the cover and mark the supply clearly with a tag or
label indicating the correct line voltage and fuse that is in
use.
4. DISPLAY OVP/CC SET Switch: Pressing this switch causes
the VOLTS display to show voltage setting for overvoltage
shutdown (trip voltage) and the AMPS display to show the
current control set value. Setting values are either front panel
settings or remote voltage programmed settings.
5. OVP Adjust Screwdriver Control: While pressing the DIS-
PLAY OVP/CC SET switch, rotating the control clock-wise
with a small, flat-blade screwdriver increases the setting for
overvoltage shutdown.
6. VOLTS Display: Digital display of actual output voltage, or
OVP shutdown setting.
7. AMPS Display: Digital display of actual output current, or
output-current setting.
8. CV LED Indicator: Output voltage is regulated when lighted.
This means the power supply is operating in the constant
voltage mode.
Figure 2. Line Voltage Selector (set for 115 Vac)
9. CC LED Indicator: Output current is regulated when lighted.
This means the power supply is operating in the constant cur-
rent mode.
10. OVP LED Indicator: Output is shutdown by the occurrence
of an overvoltage when lighted. Removing the cause of over-
voltage and turning the power off, then on, resets the power
supply.
Power Cord
To protect operating personnel, the instrument should be
grounded. This instrument is equipped with a three conductor
power cord. The third conductor is the ground conductor and
when the power cord is plugged into an appropriate receptacle,
the supply is grounded.
The power supply was shipped with a power cord for the type of
outlet used at your location. If the appropriate cord was not
included, contact your nearest Agilent Sales Office to obtain the
correct cord.
TURN-ON CHECKOUT PROCEDURE
The following checkout procedure describes the use of the front
panel controls and indicators illustrated in Figure 3 and ensures
that the supply is operational:
OPERATING INSTRUCTIONS
_
_
LOCAL
_
MASTER
+
+
+
INTRODUCTION
This section explains the operating controls and indicators and
provides information on many operating modes possible with your
instrument. The front panel controls and indicators are illustrated
in Figure 3.
M/S 1
M/S 2
CV
CC
REMOTE
SENSE
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
SLAVE
Figure 4. Switch Settings of Rear-Panel Control for Turn-
On Checkout
a. Disconnect power cord.
b. Check that the rear-panel switch settings are as shown in Fig-
ure 4.
c. Check that the rear panel label indicates that the supply is set
to match your input line voltage (If not, refer to "Line Voltage
Option Conversion".).
d. Check that the fuse on the rear panel is correct for your line
voltage.
e. Connect the power cord and push the LINE switch to ON.
f. While pressing OVP/CC SET switch, verify that the OVP
shutdown is set above 8.0, 20.0, 35.0, or 60.0 Vdc for
E3614A, E3615A, E3616A, or E3617A respectively. If not,
turn up OVP Adjust with a small flat-blade screwdriver.
g. Turn VOLTAGE control fully counter clockwise to ensure that
the output of VOLTS display decreases to 0 Vdc, then fully
clockwise to ensure that output voltage increases to the maxi-
mum output voltage.
Figure 3. Front-Panel Controls and Indicators
1. LINE Switch: Pressing this switch turns the supply on, or off.
2. VOLTAGE Control: Clockwise rotation increases output volt-
age.
h. While pressing OVP/CC SET switch, turn the CURRENT con-
trol fully counter clockwise and then fully clockwise to ensure
3. CURRENT Control: Clockwise rotation increases output cur-
rent.
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that the current limit value can be set from zero to maximum
rated value.
False OVP shutdowns may occur if you set the OVP shutdown
too close to the supply's operating voltage. Set the OVP shut-
down voltage 4% of output +2.0 V or more above the output volt-
age to avoid false shutdowns from load-induced transients.
OPERATING MODES
The setting of the rear panel switch determines the operating
modes of the power supply. The local operating mode is set so
the power supply senses the output voltage directly at the output
terminals (local sensing) for operation using the front panel con-
trols (local programming). Other operating modes are: remote
voltage sensing and remote programming of output voltage and
current using external voltages.
Adjusting OVP. Follow this procedure to adjust the OVP shut-
down voltage.
a. With the VOLTAGE control fully counter clockwise, turn on
the power supply.
b. While depressing DISPLAY OVP/CC SET switch, adjust
the OVP Adjust control to the desired OVP shutdown using
a small, flat-blade screwdriver.
LOCAL OPERATING MODE
c. Follow the procedure for CC or CV operaton to set the out-
put voltage and current
The power supply is shipped from the factory configured in the
local operating mode. Local operating mode requires the switch
settings of the rear panel, as shown in Figure 4. The power sup-
ply provides constant voltage(CV) or constant current(CC) output.
Resetting OVP. If OVP shutdown occurs, reset the supply by
turning power off. Wait one or more seconds, and turn power on
again. If OVP shutdown continue to occur, check the connections
to the load and sense terminals, and check the OVP limit setting..
Constant Voltage Operaton
To set up a power supply for constant voltage operation, proceed
as follows:
a. Turn on the power supply and adjust 10-turn VOLTAGE con-
trol for desired output voltage (output terminals open).
b. While depressing DISPLAY OVP/CC SET switch, adjust 10-
turn CURRENT control for the desired current limit.
c. With power off connect the load to the output terminals.
d. Turn on the power supply. Verify that CV LED is lighted.
During actual operation, if a load change causes the current
limit to be exceeded, the power supply will automatically
cross over to constant current mode and the output voltage
will drop proportionately.
Strong electrostatic discharge to power supply can make
OVP trip and eventually crowbar the output, which can
effectively protect output loads from the hazardous ESD
current.
CONNECTING LOADS
The output of the supply is isolated from earth ground. Either out-
put terminal may be grounded or the output can be floated up to
240 volts off ground. Total output voltage to ground must not
exceed 240 Vdc.
Constant Current Operation
To set up a power supply for constant current operation, proceed
as follows:
Each load should be connected to the power supply output terminals
using separate pairs of connecting wires. This will minimize mutual
coupling effects between loads and will retain full advantage of the
low output impedance of the power supply. Each pair of connecting
wires should be as short as possible and twisted or shielded to
reduce noise pick-up. (If a shield is used, connect one end to the
power supply ground terminal and leave the other end unconnec-
ted.)
a. Turn on power supply.
b. While depressing DISPLAY OVP/CC SET switch, adjust
CURRENT control for the desired output current.
c. Turn up the VOLTAGE control to the desired voltage limit.
d. With power off connect the load to the output terminal.
e. Turn on power supply and then verify that CC LED is lighted.
(If CV LED is lighted, choose a higher voltage limit. A voltage
setting that is greater than the current setting multiplied by the
load resistance in ohms is required for CC operation.) During
actual operation, if a load change causes the voltage limit to
be exceeded, the power supply will automatically cross over
to constant voltage operation at the preset voltage limit and
output current will drop proportionately.
If load considerations require that the output power distribution
terminals be remotely located from the power supply, then the
power supply output terminals should be connected to the remote
distribution terminals via a pair of twisted or shielded wires and
each load separately connected to the remote distribution termi-
nals. For this case, remote sensing should be used (See para-
graph "Remote Voltage Sensing").
Overvoltage Protection (OVP)
Adjustable overvoltage protection guards your load against over-
voltage. When the voltage at the output terminals increases (or is
increased by an external source) to the OVP shutdown voltage as
set by the OVP ADJUST control, the supply's OVP circuit dis-
ables the output causing the output voltage and current to drop to
zero. During OVP shutdown the OVP LED lights.
OPERATION BEYOND RATED OUTPUT
The output controls can adjust the voltage or current to values up
to 5% over the rated output. Although the supply can be operated
in the 5% overrange region without being damaged, it can not be
guaranteed to meet all of its performance specifications in this
region.
1-8
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Output Noise. Any noise picked up on the sense leads will
appear at the supply's output voltage and may degrade CV load
regulation. Twist the sense leads to minimize the pickup of exter-
nal noise and run them parallel and close to the load leads. In
noisy environments, it may be necessary to shield the sense
leads. Ground the shield at the power supply end only. Do not use
the shield as one of the sensing conductors.
REMOTE OPERATING MODES
Remote operating modes discussed below are remote voltage
sensing and remote voltage programming. You can set up the unit
for remote operating modes by changing the settings of the rear
panel switch and connecting the leads from the rear panel termi-
nals to the load or the external voltage. Solid conductors of 0.75
2
to 1.5 mm can be connected to the rear panel terminals by sim-
ply push fitting. Thinner wires or conductors are inserted into the
connection space after depressing the orange opening lever.
Stability. When the supply is connected for remote sensing, it is
possible for the impedance of the load wires and the capacitance
of the load to form a filter, which will become part of the supply's
CV feedback loop. The extra phase shift created by this filter can
degrade the supply's stability and can result in poor transient
response performance or loop stability. In extreme cases, it can
cause oscillations. Keep the leads as short as possible and twist
the leads of the load to eliminate the load lead inductance and
keep the load capacitance as small as possible.The load leads
should be of the largest diameter practical, heavy enough to limit
the voltage drop in each lead to 0.5 volts.
Turn off the supply while making changes to rear panel
switch settings or connections. This avoids the possibility
of damage to the load and OVP shutdown from unin-
tended output.
Remote Voltage Sensing
Remote voltage sensing is used to maintain good regulation at
the load and reduce the degradation of regulation that would
occur due to the voltage drop in the leads between the power
supply and the load. By connecting the supply for remote voltage
sensing, voltage is sensed at the load rather than at the supply's
output terminals. This will allow the supply to automatically com-
pensate for the voltage drop in the load leads and improve regula-
tion.
The sense leads are part of the supply's programming feedback
control loop. Accidental open-connections of sense or load leads
during remote sensing operation have various unwanted effects.
Provide secure, permanent connections-especially for the sense
leads.
_
_
LOCAL
_
MASTER
+
+
+
When the supply is connected for remote sensing, the OVP circuit
senses the voltage at the sense leads and not the main output
terminals.
M/S1
M/S2
CV
CC
REMOTE
SENSE
OUT
+S
-S
CV
CC VREF A1 A2 A3 A4 A5
SLAVE
Remote voltage sensing compensates for a voltage drop of
up to 0.5 V in each load, and there may be up to a 0.1 V
drop between the output terminal and the internal sensing
resistor, at which point the OVP circuit is connected. There-
fore, the voltage sensed by the OVP circuit could be as
much as 1.1 V more than the voltage being regulated at the
load. It may be necessary to re-adjust the OVP trip voltage
when using remote sensing.
+
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CV Regulation. Notice that any voltage drop in the sense leads
adds directly to the CV load regulation. In order to maintain the
specified performance, keep the sense lead resistance to 0.5
ohms per lead or less.
Figure 5. Remote Voltage Sensing
Remote Analog Voltage Programming
Remote analog voltage programming permits control of the regu-
lated output voltage or current by means of a remotely varied volt-
age. The programming (external) voltage should not exceed 10
volts. The stability of the programming voltages directly affects
the stability of the output. The voltage control on the front panel is
disabled during remote analog programming.
Remote Sensing Connections. Remote sensing requires
changing settings of the rear panel switch and connecting the
load leads from + and - output terminals to the load and connect-
ing the sense leads from the +S and -S terminals to the load as
shown in Figure 5.
The supply includes clamp circuits to prevent it from
supplying more than about 120% of rated output voltage
or current when the remote programming voltage is
greater than 10 Vdc. Do not intentionally operate the sup-
Observe polarity when connecting the sensing leads to
the load.
1-9
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ply above 100% rated output. Limit your programming
voltage to 10 Vdc.
MULTIPLE-SUPPLY OPERATION
Normal parallel and auto-parallel operation provides increased out-
put current while normal series and auto-series provides increased
output voltage. Auto-tracking provides single control of output volt-
age of more than one supply. You can set up the unit for multiple-
supply operation by changing the settings of the rear panel switch
and connecting the leads from the rear panel terminals to the load.
Remote Programming Connections. Remote programming
requires changing settings of the switch and connecting external
voltages to + and - terminals of "CV" or "CC" on the rear panel.
Any noise picked up on the programming leads will appear on the
supply's output and may degrade regulation. To reduce noise
pick-up, use a twisted or shielded pair of wires for programming,
with the shield grounded at one end only. Do not use the shield as
a conductor.
2
Solid conductors of 0.75 to 1.5 mm can be connected to the rear
panel terminals by simply push fitting. Thinner wires or conductors
are inserted into the connection space after depressing the orange
opening lever.
Notice that it is possible to operate a power supply simulta-
neously in the remote sensing and the remote analog program-
ming modes.
NORMAL PARALLEL OPERATION
Two or more power supplies being capable of CV/CC automatic
cross over operation can be connected in parallel to obtain a total
output current greater than that available from one power supply.
The total output current is the sum of the output currents of the
individual power supplies. The output of each power supply can
be set separately. The output voltage controls of one power sup-
ply should be set to the desired output voltage; the other power
supply should be set for a slightly higher output voltage. The sup-
ply with the higher output voltage setting will deliver its constant
current output, and drop its output voltage until it equals the out-
put of the other supply, and the other supply will remain in con-
stant voltage operation and only deliver that fraction of its rated
output current which is necessary to fulfill the total load demand.
Figure 8 shows the rear panel switch settings and terminal con-
nections for normal parallel operation of two supplies.
Remote Programming, Constant Voltage. Figure 6 shows the
rear panel switch settings and terminal connections for remote-
voltage control of output voltage. A 1 Vdc change in the remote
programming voltage produces a change in output voltage (volt-
age gain) as follows: E3614A: 0.8 Vdc, E3615A: 2 Vdc, E3616A:
3.5 Vdc, E3617A: 6 Vdc
_
_
LOCAL
_
MASTER
+
+
+
M/S 1
M/S 2
CV
CC
REMOTE
SENSE
+S
OUT
-S
CV
CC
VREF A1 A2 A3 A4 A5
SLAVE
NOTE:
POWER SUPPLY
_
_
LOCAL
_
MASTER
+
+
+
See the supplementary Manual, if you are not using
isolated programming voltage source.
Figure 6. Remote Voltage Programming, Constant
Voltage
M/S 1 M/S 2
SLAVE
CV
CC
SENSE
OUT
+S
-S
CV
CC VREF A1 A2 A3 A4 A5
REMOTE
Remote Programming, Constant Current. Figure 7 shows the
rear panel switch settings and terminal connections for remote-
voltage control of output current. A 1 Vdc change in the remote
programming voltage produces a change in output current (cur-
rent gain) as follows: E3614A: 0.6 Adc, E3615A: 0.3 Adc,
E3616A: 0.17 Adc, E3617A: 0.1 Adc
LOAD
POWER SUPPLY
MASTER
_
_
LOCAL
_
+
+
+
M/S 1 M/S 2
SLAVE
CV
CC
SENSE
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
REMOTE
_
_
LOCAL
_
MASTER
+
+
+
Figure 8. Normal Parallel Operation of Two Supplies
AUTO-PARALLEL OPERATION
Auto-parallel operation permits equal current sharing under all load
conditions, and allows complete control of output current from one
master supply. The control unit is called the master; the controlled
units are called slaves. Normally, only supplies having the same
model number should be connected for auto-parallel operation,
since the supplies must have the same voltage drop across the cur-
rent monitoring resistor at full current rating. The output current of
each slave is approximately equal to the master's. Figure 9 and Fig-
ure 10 show the rear panel switch settings and terminal connections
for auto-parallel operation of two supplies and three supplies.
M/S 1
M/S 2
CV
CC
REMOTE
SENSE
+S
OUT
-S
CV
CC
VREF A1 A2 A3 A4 A5
SLAVE
NOTE:
See the supplementary Manual, if you are not using
isolated programming voltage source.
Figure 7. Remote Voltage Programming, Constant
Current
Remote Programming Speed. See the table of Specifications,
page 1-5.
1-10
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Setting Voltage and Current. Turn the slave unit's CURRENT
control fully clockwise. Adjust the master unit's controls to set the
desired output voltage and current. The master supply operates
in a completely normal fashion and may be set up for either con-
stant voltage or constant current operation as required. Verify that
the slave is in CV operation.
gramming according to the remote-programming instructions.
MASTER POWER SUPPLY
_
_
_
_
_
MASTER
LOCAL
+
+
+
For auto-parallel operation of two supplies, the combined output
voltage is the same as the master unit's voltage setting, and the
combined output current is two times the master unit's current. In
general, for two supplies, the auto-parallel output current(Io) is
M/S 1 M/S 2
SLAVE
CV
CC
REMOTE
SENSE
SENSE
SENSE
+S
+S
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
LOAD
SLAVE POWER SUPPLY
_
_
LOCAL
MASTER
+
+
+
Io = Im + Is = 2Im
where Im = master unit's output current
Is = slave unit's output current
M/S 1 M/S 2
SLAVE
CV
CC
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
REMOTE
SLAVE POWER SUPPLY
_
_
LOCAL
MASTER
+
+
+
Proportional currents from auto-paralleled units require
equal load-lead voltage drops. Connect each supply to
the load using separate pairs of wire with length chosen
to provide equal voltage drops from pair to pair. If this is
not feasible, connect each supply to a pair of distribution
terminals using equal- voltage-drop wire pairs, and then
connect the distribution terminals to the load with a single
pair of leads.
M/S 1 M/S 2
SLAVE
CV
CC
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
REMOTE
Figure 10. Auto-Parallel Operation of Three Supplies
NORMAL SERIES OPERATION
Series operation of two or more power supplies can be accom-
plished up to the output isolation rating of any one supply to
obtain a higher voltage than that available from a single supply.
Series connected supplies can be operated with one load across
both supplies or with a separate load for each supply. These
power supplies have a reverse polarity diode connected across
the output terminals so that if operated in series with other sup-
plies, damage will not occur if the load is short-circuited or if one
supply is turned on separately from its series partners. When this
connection is used, the output voltage is the sum of the voltages
of the individual supplies. Each of the individual supplies must be
adjusted in order to obtain the total output voltage. Figure 11
shows the rear panel switch settings and terminal connections for
normal series operation of two supplies.
MASTER POWER SUPPLY
_
_
LOCAL
_
MASTER
+
+
+
M/S 1 M/S 2
SLAVE
CV
CC
SENSE
OUT
VREF
A1 A2 A3 A4 A5
+S
-S
CV
CC
REMOTE
LOAD
SLAVE POWER SUPPLY
MASTER
_
_
LOCAL
_
+
+
+
M/S 1 M/S 2
SLAVE
CV
CC
SENSE
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
REMOTE
POWER SUPPLY
_
_
LOCAL
_
MASTER
Figure 9. Auto-Parallel Operation of Two Supplies
+
+
+
Overvoltage Protection. Adjust the desired OVP shutdown limit
using the master unit's OVP Adjust control. Set the slave units'
OVP limits above the master's. When a master-unit shuts down,
the master programs the slave units to zero voltage output. If a
slave unit shuts down, it shuts only itself down. If the required cur-
rent is great enough, the master will switch from CV to CC opera-
tion.
M/S 1 M/S 2
SLAVE
CV
CC
SENSE
OUT
+S
-S
CV
CC VREF A1 A2 A3 A4 A5
REMOTE
LOAD
POWER SUPPLY
MASTER
_
_
LOCAL
_
+
+
+
Remote Sensing. To remote sense with auto-parallel operation,
connect remote-sense leads only to the master unit according to
the remote-sensing instructions.
M/S 1 M/S 2
SLAVE
CV
CC
SENSE
OUT
+S
-S
CV
CC VREF A1 A2 A3 A4 A5
Remote Analog Voltage Programming. To remote program with
REMOTE
auto-parallel operation, set up only the master unit for remote pro-
Figure 11. Normal Series Operation of Two Supplies
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above the master unit's current setting to avoid having the slave
switch to CC operation.
AUTO-SERIES OPERATION
Auto-series operation permits equal or proportional voltage
sharing, and allows control of output voltage from one master
unit. The voltage of the slaves is determined by the setting of
the front panel VOLTAGE control on the master and voltage
divider resistor. The master unit must be the most positive sup-
ply of the series. The output CURRENT controls of all series
units are operative and the current limit is equal to the lowest
setting. If any output CURRENT controls are set too low, auto-
matic cross over to constant current operation will occur and the
output voltage will drop. Figure 12 and Figure 13 show the rear
panel switch settings and terminal connections for Auto-series
operation of two supplies and three supplies. This mode can
also give ±voltage tracking operation of two supplies with two
separate loads.
When in CC operation the combined output current is the same
as the master unit's current setting, and when in CV operation the
combined output voltage is the sum of the master unit's and the
slave unit's output voltages.
Overvoltage Protection. Set the OVP shutdown voltage in each
unit so that it shuts down at a voltage higher than its output voltage
during auto-series operation. When a master unit shuts down, it pro-
grams any slave units to zero output. When a slave unit shuts down,
it shuts down only itself (and any slaves below it in the stack). The
master (and all slaves above the shut-down slave) continues to sup-
ply output voltage.
Mixed model numbers may be employed in auto-series combi-
nation without restriction, provided that each slave is specified as
being capable of auto-series operation. If the master supply is set
up for constant current operation, then the master-slave combina-
tion will act as a composite constant current source.
MASTER POWER SUPPLY
_
_
LOCAL
_
MASTER
+
+
+
M/S 1 M/S 2
SLAVE
CV
CC
SENSE
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
REMOTE
LOAD
R1 R2
SLAVE POWER SUPPLY
MASTER
Total output voltage to ground must not exceed 240 Vdc.
_
_
LOCAL
_
+
+
+
Determining Resistors. External resistors control the fraction (or
multiple) of the master unit's voltage setting that is supplied from
the slave unit. Notice that the percentage of the total output volt-
age contributed by each supply is independent of the magnitude
of the total voltage. For two units in auto-series the ratio of R1 to
R2 is
M/S 1 M/S 2
SLAVE
CV
CC
SENSE
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
REMOTE
Figure 12. Auto-Series Operation of Two Supplies
(R1+R2)/R1 = (Vo/Vm)
R2/R1
= (Vs/Vm)
MASTER POWER SUPPLY
_
_
_
LOCAL
MASTER
+
+
+
Where Vo = auto-series voltage = Vs + Vm
Vm = master unit's output voltage
Vs = slave unit's output voltage
M/S 1 M/S 2
SLAVE
CV
CC
REMOTE
SENSE
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
For example, using the E3617A as a slave unit and putting R2=50
kΩ (1/4 watt), then from the above equations,
R1 = R2(Vm/Vs) = 50(Vm/Vs) kΩ
LOAD
R1 R2
SLAVE POWER SUPPLY(S1)
_
_
_
LOCAL
MASTER
+
+
+
In order to maintain the temperature coefficient and stability perfor-
mance of the supply, choose stable, low noise resistors.
M/S 1 M/S 2
SLAVE
CV
CC
REMOTE
SENSE
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
R3 R4
SLAVE POWER SUPPLY(S2)
It is recommended to connect a 0.1 µF capacitor in paral-
lel with R2 in two supplies operation or R2 and R4 in
three supplies operation to ensure the stable operation.
_
_
_
LOCAL
MASTER
+
+
+
Setting Voltage and Current. Use the master unit's controls to
set the desired output voltage and current. The VOLTAGE control
of the slave unit is disabled. Turning the voltage control of the
master unit will result in a continuous variation of the output of the
series combination, with the contribution of the master's output
voltage to that of the slave's voltage always remaining in the ratio
of the external resistors. Set the CURRENT control of slave unit
M/S 1 M/S 2
SLAVE
CV
CC
SENSE
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
REMOTE
R2
R1
R2R4
Vo=Vm(1+
+
)
Where Vo = Auto-Series voltage = Vm + Vs1 + Vs2
Vm = master unit's output voltage
R1R3
Vs1 = slave(S1) unit's output voltage
Vs2 = slave(S2) unit's output voltage
Figure 13. Auto-Series Operation of Three Supplies
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Remote Sensing. To remote sense with auto-series operation,
set SENSE switch of the master unit and set SENSE switch of the
slave unit to remote.
Remote Analog Programming. To simultaneously remote pro-
gram both units' output voltages, set up only the master unit for
remote voltage programming according to the remote program-
ming instructions. To vary the fraction of the output voltage contri-
bution by the slave unit, connect a variable resistor in place of R2
in two units operation. To independently remote program each
unit's output current setting, set up each unit for remote control of
output current according to the instructions under "Remote Pro-
gramming, Constant Current" paragraph.
Remote Analog Voltage Programming. To remote analog pro-
gram with auto-series operation, connect program (external) volt-
ages to the "CV" or "CC"" terminal of the master unit and set "CV"
or "CC" switch of the master unit to remote.
AUTO-TRACKING OPERATON
Auto-tracking operation of power supplies is similar to auto-series
operation except that the master and slave supplies have the
same output polarity with respect to a common bus or ground.
This operation is useful where simultaneous turn-up, turn-down or
proportional control of all power supplies is required.
MASTER POWER SUPPLY
_
_
LOCAL
_
MASTER
+
+
+
M/S 1 M/S 2
SLAVE
CV
CC
SENSE
OUT
VREF
A1 A2 A3 A4 A5
+S
-S
CV
CC
REMOTE
LOAD
Figure 14 and Figure 15 show two and three supplies connected
in auto-tracking with their negative output terminals connected
together as a common or ground point. For two units in auto-
tracking a fraction R2/(R1+R2) of the output of the master supply
is provided as one of the inputs to the comparison amplifier of the
slave supply, thus controlling the slave's output. The master sup-
ply in an auto-tracking operation must be the positive supply hav-
ing the largest output voltage. Turn-up and turn-down of the
power supplies are controlled by the master supply. In order to
maintain the temperature coefficient and stability specifications of
the power supply, the external resistor should be stable, low
noise, low temperature.
R1 R2
LOAD
SLAVE POWER SUPPLY
MASTER
_
_
LOCAL
_
+
+
+
M/S 1 M/S 2
SLAVE
CV
CC
SENSE
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
REMOTE
Figure 14. Auto-Tracking Operation of Two Supplies
Determining Resistors. External resistors control the fraction of
the master unit's voltage that is supplied from the slave unit. For
two units in auto-tracking the ratio R1 and R2 is
MASTER POWER SUPPLY
_
_
_
LOCAL
MASTER
+
+
+
R2/(R1+R2 = (Vs/Vm)
Where Vm = master output voltage
Vs = slave output voltage
M/S 1 M/S 2
SLAVE
CV
CC
REMOTE
SENSE
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
LOAD
R1 R2
LOAD
SLAVE POWER SUPPLY(S1)
_
_
_
LOCAL
MASTER
+
+
+
It is recommended to connect a 0.1 µF capacitor in paral-
lel with R2 in two supplies operation or R2 and R4 in
three supplies operation to ensure the stable operation.
M/S 1 M/S 2
SLAVE
CV
CC
REMOTE
SENSE
Setting Voltage and Current. Use the master unit's VOLTAGE con-
trol to set the output voltage from both units. When the master is in
CV operation, the master's output voltage(Vm) is the same as its
voltage setting, and the slave's output voltage for two units operation
is Vm(R2/(R1+R2)). The VOLTAGE control of the slave unit is dis-
abled. Set the CURRENT controls of master and slave units above
the required currents to assure CV operation of master and slave
units.
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
R3 R4
LOAD
SLAVE POWER SUPPLY(S2)
_
_
_
LOCAL
MASTER
+
+
+
M/S 1 M/S 2
SLAVE
CV
CC
REMOTE
SENSE
+S
OUT
-S
CV
CC VREF A1 A2 A3 A4 A5
Overvoltage Protection. Set the OVP shutdown voltage in each
unit so that it shuts down at a voltage higher than its output volt-
age during auto-tracking operation. When a master unit shuts
down, it programs any slave units to zero output. When a slave
unit shuts down, it shuts down only itself.
R2
R1+R2
R4
Vm = masters unit's output voltage
Vs1 = slave(S1) unit's output voltage
Vs2 = slave(S2) unit's output voltage
Vs1 =
Vm
Where
Vs2 =
Vs1
R3+R4
Figure 15. Auto-Tracking Operation of Three Supplies
Remote Sensing. To include remote sensing with auto-tracking
operation independently, set up each unit for remote sensing
according to the remote-sensing instructions under previous
paragraph.
1-13
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a. The output impedance of the power supply decreases with
increasing frequency.
b. The recovery time of the output voltage is longer for load
resistance changes.
LOAD CONSIDERATIONS
This section provides information on operating your supply with
various types of loads connected to its output.
c. A large surge current causing a high power dissipation in the
load occurs when the load resistance is reduced rapidly.
PULSE LOADING
The power supply will automatically cross over from constant-
voltage to constant current operation in response to an increase
(over the preset limit) in the output current. Although the preset
limit may be set higher than the average output current, high peak
currents (as occur in pulse loading) may exceed the preset cur-
rent limit and cause cross over to occur. If this cross over limiting
is not desired, set the preset limit for the peak requirement and
not the average.
REVERSE VOLTAGE LOADING
A diode is connected across the output terminals with reverse
polarity. This diode protects the output electrolytic capacitors and
the series regulator transistors from the effects of a reverse volt-
age applied across the output terminals. For example, in series
operation of two supplies, if the AC is removed from one supply,
the diode prevents damage to the unenergized supply which
would otherwise result from a reverse polarity voltage.
REVERSE CURRENT LOADING
An active load connected to the power supply may actually
deliver a reverse current to the power supply during a portion of
its operating cycle. An external source can not be allowed to
pump current into the supply without loss of regulation and possi-
ble damage to the output capacitor of the power supply. To avoid
these effects, it is necessary to preload the supply with a dummy
load resistor so that the power supply delivers current through the
entire operating cycle of the load devices.
Since series regulator transistors cannot withstand reverse volt-
age, another diode is connected across the series transistor. This
diode protects the series regulators in parallel or auto-parallel
operation if one supply of the parallel combination is turned on
before the other.
BATTERY CHARGING
The power supply's OVP circuit contains a crowbar SCR, which
effectively shorts the output of the supply whenever the OVP trips. If
an external voltage source such as a battery is connected across the
output, and OVP inadvertently triggered, the SCR will continuously
sink a large current from the source; possibly damaging the supply.
To avoid this a diode must be connected in series with the output as
shown in Figure 17.
Figure 16. Reverse Current Loading Solution
Figure 17. Recommended Protection Circuit for
Battery Charging
OUTPUT CAPACITANCE
An internal capacitor, connected across the output terminals of
the power supply, helps to supply high-current pulses of short
duration during constant voltage operation. Any capacitance
added externally will improve the pulse current capability, but will
decrease the safety provided by the current limiting circuit. A
high-current pulse may damage load components before the
average output current is large enough to cause the current limit-
ing circuit to operate.
The effect of the output capacitor during constant current opera-
tion are as follows:
1-14
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SERVICE INFORMATION
Figure A-1. Block Diagram
The main secondary winding of the power transformer has
PRINCIPLES OF OPERATION
(Block Diagram Overview)
three sections (N1, N2, and N3), each of which has a different
turns ratio with respect to the primary winding. At the begin-
ning of each half-cycle of the input ac, the control circuit
determines whether one pair, both or none of the SCR will be
fired. If neither SCR is fired, the bridge diode (CR13) receives
an ac input voltage that is determined by N1 turns and the
input capacitors charge to a corresponding level. If SCR
CR15 and CR18 are fired, input capacitors charge to the volt-
age determined by N1+N2 turns. Similarly, if CR10 and CR12
are fired the capacitors are charged by N1 + N3. Finally, if all
SCRs are fired simultaneously, input capacitors charge to its
highest voltage level determined by N1 + N2 + N3 turns.
Throughout this discussion, refer to both the block diagram of
Figure A-1 and the schematic diagrams at the rear of the
manual. The input ac line voltage is first applied to the prereg-
ulator which operates in conjunction with the SCR control cir-
cuit (preregulator control circuit) to rectify the tap switched AC
voltage. This preregulator minimizes the power dissipated in
the series regulating elements by controlling the dc level
across the input filter capacitor, depending on the output volt-
age.
To achieve this, tap switching is accomplished by four SCRs
and one bridge diode (CR10, CR12, CR15, CR18 and CR13)
and the SCR control circuit. By selecting different SCR firing
combinations from SCR control circuit, these circuits allow the
input capacitors (C7 and C8) to charge to one of four discrete
voltage levels, depending on the output voltage required.
The SCR control circuit determines which SCRs are to be
fired by monitoring the output voltage and comparing these
values against a set of three internally derived reference lev-
els. These three reference levels are translated into boundary
lines to allow the output characteristic to be mapped into four
operating regions (Figure A-2). The boundary lines, which are
invisible to the user, are divided into four operating regions
(V1, V2, V3, and V4) to minimize the power dissipation in the
A-1
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series pass transistors. Whenever the output voltage is below
the sloping V1 line, the control circuit inhibits four SCRs and
the input capacitors charge to a voltage determined by N1.
Figure A-2 indicates the windings that are connected as a
result of the other voltage decisions.
Full protection against any overload condition is inherent in
the Constant Voltage/Constant Current design principle since
there is not any load condition that can cause an output which
lies outside the operating region. For either constant voltage
or constant current operation, the proper choice of front panel
voltage and current control settings insures optimum pro-
tection for the load device as well as full protection for the
power supply.
The reference and bias circuit provides stable reference volt-
ages which are used by the constant voltage/current error
amplifier circuits for comparison purpose. The display circuit
provides an indication of output voltage and current for con-
stant voltage or constant current operating modes.
An operator error or a component failure within the regulating
feedback loop can drive a power supply's output voltage to
many times its preset value. The overvoltage protection cir-
cuit is to protect the load against this possibility. The circuit
insures that the power supply voltage across the load will
never exceed a preset limit.
Figure A-2. Output Power Plot
Diode CR19 is connected across the output terminals in
reverse polarity. It protects the output electrolytic capacitor
and the series regulator transistors from the effects of a
reverse voltage applied across the output terminals.
The series regulators (Q1 and Q4) are part of a feedback loop
which consists of the driver and the Constant Voltage/Con-
stant Current error amplifier. The series regulator feedback
loop provides "fine and fast" regulation of the output while the
preregulator feedback loop handles large, relatively slow, reg-
ulation demands.
The display power circuit provides voltage which is used by A/
D converter and LED drive.
The regulator is made to alter its conduction to maintain a
constant output voltage or current. The voltage developed
across the current sampling resistors (R58 and R59) is the
input to the constant current error amplifier. The constant volt-
age error amplifier obtains its input by sampling the output
voltage of the supply.
MAINTENANCE
INTRODUCTION
This section provides performance test and calibration proce-
dures and troubleshooting information. The following opera-
tion verification tests comprise a short procedure to verify that
the power supply is performing properly, without testing all
specified parameters.
Any changes in output voltage or current are detected and
amplified by the constant voltage or constant current error cir-
cuit and applied to the series regulator in the correct phase
and amplitude to counteract the change in output voltage or
current.
If a fault is detected in the power supply while making the
performance check or during normal operation, proceed to
the troubleshooting procedures. After troubleshooting, per-
form any necessary adjustments and calibrations. Before
returning the power supply to normal operation, repeat the
performance check to ensure that the fault has been properly
corrected and that no other faults exist.
Two error amplifiers are included in a CV/CC supply, one for
controlling output voltage, the other for controlling output cur-
rent. Since the constant voltage amplifier tends to achieve
zero output impedance and alters the output current when-
ever the load resistance changes, while the constant current
amplifier causes the output impedance to be infinite and
changes the output voltage in response to any load resis-
tance change, it is obvious that the two amplifiers can not
operate simultaneously. For any given value of load resis-
tance, the power supply must act either as a constant voltage
source or as a constant current source - it can not be both;
transfer between these two modes is accomplished at a value
of load resistance equal to the ratio of the output voltage con-
trol setting to the output current control setting.
Test Equipment Required
The following Table A-1 lists the equipment required to perform
the tests and adjustments of this section. You can separately
identify the equipment for performance tests, calibration, and
troubleshooting in the USE column of the table.
Operation Verification Tests
The following tests assure that the power supply is per-
forming properly. They do not, however, check all the speci-
fied parameters tested in the complete performance test
described below. Proceed as follows:
A-2
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a. Perform turn-on checkout procedure given in page 1-7.
b. Perform the CV and CC Load Regulation perfor-
mance tests given in the following paragraphs
respectively.
Electronic Load. The test and calibration procedures use an
electronic load to test the supply quickly and accurately. An
electronic load is considerably easier to use than load resis-
tor. It eliminates the need for connecting resistors or rheostats
in parallel to handle the power, it is much more stable than
carbon-pile load, and it makes easy work of switching
between load conditions as is required for the load regulation
and load transient response tests.
PERFORMANCE TESTS
The following paragraphs provide test procedures for verify-
ing the power supply's compliance with the specifications of
Table 1. Please refer to adjustment and calibration or trouble-
shooting procedure if you observe any out of specification
performance.
Current Monitoring Resistor Rs. To eliminate output-current
measurement error caused by voltage drops in the leads and
connections, connect the current monitoring (sampling) resis-
tor between -OUT and the load as a four-terminal device. Fig-
ure A-3 shows correct connections. Connect the current
monitoring test leads inside the load lead connections directly
at the monitoring resistor element. Select a resistor with sta-
ble characteristics and lower temperature coefficient (see
Table A-1).
Measurement Techniques
Setup for All Tests. Measure the output voltage directly at the
+S and -S terminals on the rear panel; in this way the monitoring
device sees the same performance as the feedback amplifier
within the power supply. Failure to connect the monitoring device
to the proper points shown in Figure A-3 will result in the mea-
surement not of the power supply characteristics, but of the
power supply plus the resistance of the leads between its output
terminals and the point of connection.
Use separate leads to all measuring devices to avoid the sub-
tle mutual coupling effects that may occur between measur-
ing devices unless all are returned to the low impedance
terminals of the power supply. Twisted pairs or shielded cable
should be used to avoid pickup on the measuring leads.
Figure A-3. Current Monitoring Resistor Connections
Table A-1. Test Equipment Required
TYPE
Oscilloscope
REQUIRED CHARACTERISTICS
Sensitivity : 1 mV
USE
P, T
RECOMMENDED MODEL
Agilent 54600A
Bandwidth : 20 MHz/100 MHz
Input : Differential, 50 ohm and 100 ohm
RMS Voltmeter
True rms, 20 MHz bandwidth
Sensitivity : 1 mV
P
Accuracy : 5%
Multimeter
Resolution : 100 nV
Accuracy : 0.0035%
P, A, T
P
Agilent 34401A
Agilent 6063A
Electronic Load
Voltage Range : 240 Vdc
Current Range : 10 Adc
Open and short switches
Transient on/off
Load Resistor (R )
1.3 ohm 60 W, 6.6 ohm 60 W, 20.5 ohm 60 W,
60 ohm 60 W
P
L
Current Monitoring
0.1 ohm 0.1% 10 W, 1 ohm 1% 5 W
P, A
(Sampling) Resistor (R )
S
Variable Voltage
Auto Transformer
Range : 85-130 and 200-260 Volts
P, T
* P = Performance testing A = Calibration adjustments T = Troubleshooting.
A-3
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Line Regulation (Source Effect)
CONSTANT VOLTAGE (CV) TESTS
Definition: Line regulation is the change in the steady state
value of dc output voltage due to a change in ac input voltage
from a minimum to a maximum value(±10% of nominal volt-
age).
CV Setup. For all CV tests set the output current at full rated
output to assure CV operation. The onset of constant current
can cause a drop in output voltage, increased ripple, and
other performance changes not properly ascribed to the con-
stant voltage operation of the supply.
Test Parameter:
Measured Variable: Output Voltage
Expected Results: Less than 0.01% plus 2 mV
Test Procedure:
Load Regulation (Load Effect)
Definition: CV Load regulation is the change in the steady
state value of dc output voltage due to a change in load resis-
tance from open circuit to full load or from full load to open cir-
cuit.
a. Connect the test equipment as shown in Figure A-4.
Operate the electronic load in constant current mode
and set its current to the full rated value of the power
supply.
Test Parameters:
b. Connect the supply to the ac power line through a
variable autotransformer which is set for low line volt-
age(104 Vac for nominal 115 Vac, 90 Vac for nominal
100 Vac, and 207 Vac for nominal 230 Vac).
c. Turn the supply's power on and turn CURRENT con-
trol fully clockwise.
d. Adjust VOLTAGE control until the front panel VOLTS
display indicates exactly the maximum rated output
voltage.
e. Record voltage indicated on the digital voltmeter.
f. Adjust autotransformer to high line voltage(127 Vac
for nominal 115 Vac, 110 Vac for nominal 100 Vac,
and 253 Vac for nominal 230 Vac).
g. When the reading settles, record the output voltage
again. Check that the two recorded readings differ
less than 0.01% of output voltage plus 2 mV.
Measured Variable: Output Voltage
Expected Results: Less than 0.01% plus 2 mV
Test Procedure:
a. Connect the test equipment as shown in Figure A-4.
Operate the electronic load in constant current mode
and set its current to the full rated value of the power
supply (6 A for E3614A, 3 A for E3615A, 1.7 A for
E3616A and 1 A for E3617A).
b. Turn the supply's power on and turn CURRENT con-
trol fully clockwise.
c. Turn up output voltage to the full rated value (8 V for
E3614A, 20 V for E3615A, 35 V for E3616A and 60 V
for E3617A) as read on the digital voltmeter.
d. Record the output voltage at the digital voltmeter.
e. Operate the electronic load in open(input off) mode.
f. When the reading settles, record the output voltage on
the digital voltmeter again. Check that the two recorded
readings differ less than 0.01% of output voltage plus 2
mV.
Load Transient Response Time
Definition : This is the time for the output voltage to return to
within a specified band around its voltage following a change
from full load to half load or half load to full load.
Test Parameter:
POWER SUPPLY
LOCAL
MASTER
Measured Variable: Output Voltage Transients
Expected Results: Less than 50 usec (at 15 mV from
base line)
UNDER TEST
Test Procedure:
a. Connect the test equipment as shown in Figure A-4,
but replace the DVM with the oscilloscope. Operate
the electronic load in constant current mode.
b. Turn the supply's power on and turn CURRENT con-
trol fully clockwise.
SENSE
CV
CC
M/S 1
M/S 2
REMOTE
SLAVE
+
-
+
-
+
-
c. Turn up output voltage to the full rated value.
d. Set the electronic load to transient operation mode
between one half of supply's full rated value and sup-
ply's full rated value at a 1 KHz rate with 50% duty
cycle.
e. Set the oscilloscope for ac coupling, internal sync and
lock on either the positive or negative load transient.
f. Adjust the oscilloscope to display transients as in Fig-
ure A-5.
+S
-S
CC
VREF A1 A2 A3 A4 A5
OUT
CV
+
DIGITAL
-
VOLTMETER
-
TO
Rs
DVM
+
Model
Rs
-
+
g. Check that the pulse width of the transients at 15 mV
from the base line is no more than 50 usec as shown.
E3614A, 15A, 16A
E3617A
0.1 ohm 0.1% 10W
1 ohm 1% 5W
ELECTRONIC
LOAD
Figure A-4. Basic Test Setup
A-4
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Figure A-5. Load Transient Response Time Waveform
PARD(Ripple and Noise)
Definition: PARD is the Periodic and Random Deviation of
the dc output voltage from its average value, over a specified
bandwidth and with all other parameters maintained constant.
Constant voltage PARD is measured in the root-mean-
square(rms) or peak-to-peak(pp) values over a 20 Hz to 20
MHz bandwidth. Fluctuations below the lower frequency limit
are treated as drift.
PARD(RMS) Measurement
The rms measurement is not an ideal representation of the
noise, since fairly high output noise spikes of short duration
could be present in the ripple and not appreciably increase
the rms value.
Test Parameter:
Measured Variable: Output Voltage(rms)
Expected Results: Less than 200 µV rms
Test Procedure:
Figure A-6. CV PARD RMS Measurement Test Setup
a. Connect the test equipment as shown in Figure A-6.
b. Turn the supply's power on and turn CURRENT con-
trol fully clockwise.
c. Turn up output voltage to the full rated value. Check
that the supply's CV indicator remains lighted.
Reduce VOLTAGE control if not lighted.
d. Check that the rms noise voltage at the true rms volt-
meter is less than 200BµV.
PARD(Peak-to-Peak) Measurement
The peak-to-peak measurement is particularly important for
applications where noise spikes could be detrimental to a
sensitive load, such as logic circuitry.
Test Parameter:
Measured Variable: Output voltage(peak-to-peak)
Expected Results: Less than 1 mV p-p (20 Hz-20 MHz)
Test Procedure:
A-5
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a. Connect the test equipment as shown in Figure A-7.
b. Turn the supply's power on and turn CURRENT con-
trol fully clockwise.
c. Turn up output voltage to the full rated value. Check
that the supply's CV indicator remains lighted.
Reduce VOLTAGE control if not lighted.
d. Set the oscilloscope to AC mode and bandwidth to 20
MHz.
CONSTANT CURRENT (CC) TESTS
CC Setup. Constant current tests are analogous to constant
voltage tests, with the supply's output short circuited and the
voltage set to full output to assure CC operation. For output
current measurements the current monitoring resistor must
be treated as a four terminal device. Refer to the "Measure-
ment Techniques" for details. All constant current measure-
ments are made in terms of the change in voltage across this
resistor; the current performance is calculated by dividing
these voltage changes by ohmic value of Rs.
e. Check that the peak-to-peak noise is less than 1 mV.
Load Regulation (Load Effect)
Definition: CC Load regulation is the change in the steady state
value of dc output current due to a change in load resistance
from short circuit to full load or from full load to short circuit.
Test Parameter:
Measured Variable: Output Current
Expected Results: Less than 0.01% plus 250 µA
Test Procedure:
a. Connect the DVM across Rs in Figure A-4. Operate
the electronic load in constant voltage mode and set
its voltage to the full rated value of power supply.
b. Turn the supply's power on and turn VOLTAGE con-
trol fully clockwise.
c. Turn up output current to the full rated value. Check
that the AMPS display reads full rated values and CC
indicator remains lighted. Reduce CURRENT control
if not lighted.
d. Record the voltage across Rs and convert it to cur-
rent by dividing this voltage by Rs.
e. Operate the electronic load in short (input short)
mode.
Figure A-7.BCV PARD Peak-to-Peak Measurement Test
Setup
f. When the reading settles, record voltage across Rs
again and convert it current. Check that the two
recorded readings differ less than 0.01% of output
current plus 250 µA.
CV Drift (Stability)
Definition: The change in output voltage (dc to 20 Hz) for the
first 8 hours following a 30-minute warm-up period with con-
stant input line voltage, constant load resistance and constant
ambient temperature.
Line Regulation (Source Effect)
Definition: Line regulation is the change in the steady state
value of dc output current due to a change in ac input voltage
from the minimum to maximum value(±10% of nominal voltage).
Test Parameter:
Measured Variable: Output Voltage
Expected Results: Less than 0.1% plus 5 mV
Test Procedure:
Test Parameter:
Measured Variable: Output Current
Expected Results: Less than 0.01% plus 250 µA
Test Procedure:
a. Connect the DVM across Rs in Figure A-4.
b. Operate the electronic load in constant current mode
and set its current to the full rated value of power sup-
ply.
c. Turn the supply's power on and turn CURRENT con-
trol fully clockwise.
d. Turn up output voltage to the full rated value as read
on the digital voltmeter.
e. After a 30-minute warm-up, note the voltage on DVM.
f. The output voltage reading should deviate less than
0.1% plus 5 mV from the reading obtained in step e
over a period of 8 hours.
a. Connect the DVM across Rs in Figure A-4. Operate
the electronic load in constant voltage mode and set
its voltage to the full rated value of power supply.
b. Connect the supply to the ac power line through a
variable autotransformer that set for low line volt-
age(104 Vac for nominal 115 Vac, 90 Vac for nominal
100 Vac, and 207 Vac for nominal 230 Vac).
c. Turn the supply's power on and turn VOLTAGE con-
trol fully clockwise.
d. Turn up output current to the full rated value. Check
that the AMPS display reads full rated values and CC
indicator remains lighted. Reduce CURRENT control
if not lighted.
A-6
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e. Record output voltage across Rs and convert it to
current by dividing this voltage by Rs.
f. Adjust autotransformer to the high line voltage (127
Vac for nominal 115 Vac, 110 Vac for nominal 100
Vac, and 253 Vac for nominal 230 Vac).
CC Drift (Stability)
Definition: The change in output current for the first 8 hours fol-
lowing a 30-minute warm-up with constant input line voltage,
constant load resistance and constant ambient temperature.
g. When the reading settles, record the voltage across
Rs again and convert it current. Check that the two
recorded readings differ less than 0.01% of output
current plus 250 µA.
Test Parameter:
Measured Variable: Output Current
Expected Results: Less than 0.1% plus 10 mA
Test Procedure:
a. Connect the DVM across Rs in Figure A-4. Operate
the electronic load in constant voltage mode and set
its voltage to the full rated value of the power supply.
b. Turn the supply's power on and turn VOLTAGE con-
trol fully clockwise.
c. Turn up output current to the full rated value.
d. After a 30-minute warm-up, note the voltage on DVM
and convert it to current by dividing this voltage by Rs.
e. The converted output current should deviate less than
0.1% plus 10 mA from the current obtained in step d
over a period of 8 hours.
PARD(Ripple and Noise)
Definition : The residual ac current which is superimposed
on the dc output current of a power supply. Constant current
PARD is specified as the root-mean-square(rms) output cur-
rent in a frequency range of 20 Hz to 20 MHz with the supply
in CC operation.
PARD(RMS) Measurement
Test Parameter:
Measured Variable: Output Current(rms)
Expected Results: E3614A: Less than 5 mA rms
E3615A: Less than 2 mA rms
ADJUSTMENT AND CALIBRATION
PROCEDURE
Adjustment and calibration may be required after perfor-
mance testing, troubleshooting, or repair and replacement.
Perform those adjustments that affect the operation of the
faulty circuit and no others. To remove the top cover, refer to
"Line Voltage Option Conversion" paragraph.
E3616A: Less than 500 µA rms
E3617A: Less than 500 µA rms
Test Procedure:
a. Connect the test equipment as shown in Figure A-8.
b. Turn the supply's power on and turn VOLTAGE con-
trol fully clockwise.
c. Turn up output current to the full rated value. Check
that the CC indicator remains lighted. Reduce CUR-
RENT control if not lighted.
d. Record rms voltage across Rs and convert it to cur-
rent by dividing this voltage by Rs.
e. Check that the rms noise current is less than 5 mA
rms for E3614A, 2 mA rms for E3615A and 500 µA
rms for E3616A and E3617A respectively.
Maintenance described herein is performed with
power supplied to the supply, and protective covers
removed. Such maintenance should be performed
only service-trained personnel who are aware of the
hazards involved (for example, fire and electrical
shock). Where maintenance can be performed with-
out power applied, the power should be removed.
Figure A-8. CC PARD RMS Measurement Test Setup
Figure A-9. Calibration Test Setup
A-7
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Overall Troubleshooting Procedure
Ammeter and CC Set Calibration
To calibrate ammeter and CC set, proceed as follows:
a. Connect test setup on Figure A-9.
To locate the cause of trouble follow steps 1, 2, and 3 in
sequence. Before attempting overall troubleshooting, ensure
that the rear-panel switches M/S 1 and M/S 2 be set to MAS-
TER position and CV, CC, and SENSE to LOCAL position.
1. Check that input power is available, and check the
power cord and rear panel line fuse. When replacing
line fuse, be certain to select fuse of proper rating for
line voltage being used.
b. Turn VOLTAGE and CURRENT control fully clock-
wise.
c. Turn on the supply and to calibrate ammeter adjust
R5 on the display board until front panel AMPS dis-
play reads exactly DVM value divided by Rs.
d. To calibrate CC Set adjust R69 on the main board
until front panel AMPS display reads exactly DVM
value divided by Rs while depressing OVP/CC Set
switch.
2. In almost all cases, the trouble source can be caused
by the dc bias or reference voltages; thus, it is a good
practice to check voltages in Table A-2 before pro-
ceeding with step 3.
3. Disconnect the load and examine Table A-3 to deter-
mine your symptom, then check the probable cause.
Voltmeter and OVP Set Calibration
To calibrate voltmeter and OVP set, proceed as follows:
a. Disconnect Rs from test setup on Figure A-9 and
connect DVM across output terminal of the supply.
b. Turn on the supply.
Reference and Bias Circuit
a. Make an ohmmeter check to be certain that neither
the positive and negative output terminal is grounded.
b. Turn front panel VOLTAGE and CURRENT controls
fully clockwise.
c. To calibrate voltmeter for E3614A, adjust R16 on the
display board until front panel VOLTS display reads
exactly DVM value. To calibrate voltmeter for
c. Turn on power supply (no load connected).
d. Proceed as instructed in Table A-2.
E3615A, E3616A and E3617A set the output voltage
below 18V (ex, 15V), and adjust R16 on the display
board until front panel VOLTS display reads exactly
DVM value. Next, set the output voltage above 20V
(ex, 21V) and adjust R17 on the display board until
front panel VOLTS display reads exactly DVM value.
d. To calibrate OVP Set, turn down the OVP Adjust
screwdriver control on the front panel slowly until the
OVP circuit trips. Record the output voltage when the
OVP trip occurs. Then adjust R97 on the main board
until front panel VOLTS display reads exactly OVP
trip voltage while depressing OVP/CC Set switch.
Regulating Loop Troubles
If the voltages in Table A-2 have been checked to eliminate
the reference and bias circuits as a source of trouble; the mal-
function is caused by either the series regulator or preregula-
tor feedback loop. Because the interaction between these two
loops makes logical troubleshooting difficult, the following
steps help you to locate the source of troubles in these two
feedback loops. Once the trouble has been located to one of
the feedback loops, the operation of either loop can be ana-
lyzed independently. This method should be followed when-
ever a low output voltage condition exists. Notice that
troubleshooting can proceed directly as described in Table A-
4 whenever a high output voltage condition exists.
1. Turn on the power supply with full load connected
and increase output voltage by turning up the front
panel voltage control. The output voltage is clamped
and CV indicator is turned off at some output voltage
(below full rated output voltage). If this is the case,
the series regulator feedback loop is operating
TROUBLESHOOTING
Before attempting to troubleshoot the power supply, ensure
that the fault is with the supply and not with an associated cir-
cuit. The performance test enables this to be determined
without having to remove the covers from the supply.
normally and the trouble condition is probably due to
a defect in the preregulator feedback loop (refer to
Table A-6). If the output voltage remains in low stage,
and varying the front panel voltage control has little or
no effect, then the trouble is probably in the series
regulator feedback loop. Refer to Table A-5.
The applicable test points are identified by encircled
numbers on the schematic diagrams at the rear of the
manual, Figure A-10, Figure A-11, Figure A-12, and
Figure 13.
2. Measure the voltage between TP2 and TP1 (shown
on the schematic diagram at the rear of the manual)
with full load with oscilloscope while increasing the
output voltage from 0 to full rated voltage. The volt-
age measured has step changes three times during 0
to full output voltage swing. If this is the case, prereg-
ulator feedback loop is operating normally. If this is
not the case, the trouble is probably in the preregula-
tor feedback loop. Refer to Table A-6.
A good understanding of the principles of operation is a help-
ful aid in troubleshooting, and it is recommended that princi-
ples of operation in this manual be reviewed before
attempting to troubleshoot the supply. Once the principles of
operation are understood, refer to the overall troubleshooting
procedures paragraph to locate the symptom and probable
cause.
Once the defective component has been located (by means
of visual inspection or trouble analysis) replace it and recon-
duct the performance test. After a component is replaced,
perform the meter calibration.
A-8
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After the trouble has been isolated to one of the feedback
loops, troubleshooting can proceed as described in Tables A-
4, A-5, or A-6.
series regulator backwards a stage at a time, since loop fail-
ures occur more often at the higher power levels.
Preregulator Feedback Loop. The preregulator feedback
loop (SCR control circuit) can be conveniently checked using
Table A-6. As indicated in Table A-6, the control circuit is
checked by starting with the waveform at point 7 and point 6
(shown on the schematic diagram) and tracing forwards and
backwards from this point.
Series Regulating Feedback Loop. When troubleshooting
the series regulating loop, it is useful to open the loop since
measurements made anywhere within a closed loop may
appear abnormal. With a loop closed, it is very difficult to sep-
arate cause from effect. As described in Tables A-4 and A-5,
the conduction or cutoff capability of each stage is checked
by shorting or opening a previous stage, as follows:
1. Shorting the emitter to collector of a transistor simu-
lates saturation, or the full ON condition.
Overvoltage Protection Circuit Troubles
When troubleshooting the overvoltage protection circuit, it is
useful to check the turn-on overshoot control circuit which
includes U20 and Q10. The function of the control circuit is to
slow down the rising speed of the +15 V bias the moment the
power is turned on. This function prevents the supply from
false OVP tripping the moment the power is turned on. After
the troubles has been isolated to overvoltage protection cir-
cuit, troubleshooting can proceed as described in Table A-7.
2. Shorting the emitter to base of a transistor cuts it off,
and simulates an open circuit between emitter and
collector.
Although a logical first choice might be to break the loop
somewhere near its mid-point, and then perform successive
subdividing tests, it is more useful to trace the loop from the
Table A-2. Reference and Bias Circuit Troubleshooting
METER
COMMON
METER
POSITIVE
NORMAL INDICATION
NORMAL RIPPLE
(p-p)
PROBABLE CAUSE
TP6
TP6
TP6
TP6
TP6
point 2
+15.0 +/- 0.3 Vdc
-12.0 +/- 0.3 Vdc
+10.5 +/- 0.2 Vdc
-5.1 +/- 0.5 Vdc
+5.0 +/- 0.3 Vdc
2 mV
2 mV
2 mV
2 mV
4 mV
Check U13, CR31, and CR32.
Check +15 V bias or U14.
Check +15 V bias, U11, and U14.
Check -12 V bias or VR1.
Check U1 and CR2.
point 4
TP7
point 3
point 5
Table A-3. Overall Troubleshooting
CHECKS AND PROBABLE CAUSES
SYMPTOM
High Output Voltage
a. Check series regulator feedback loop or preregulator feedback loop.
b. Refer to "Regulating Loop Troubles" paragraph or Table A-4 or A-6 as instructed.
Low and No Output Voltage
High Ripple
a. If output is zero, check fuse.
b. Check series regulator feedback loop or preregulator loop.
Refer to "Regulating Loop Troubles" paragraph or Table A-5 or A-6 as instructed.
c. Check CR20 shorted.
a. Check operating setup for ground loops.
b. If output floating, connect 1 µF capacitor between output and ground.
c. Ensure that the supply is not crossing over to constant current mode
under loaded conditions.
d. Check for low voltage across C7 or Q1 and Q4.
e. Check for excessive ripple on reference voltages (Table A-2).
Poor Line Regulation
(Constant Voltage)
a. Check +10 V reference voltage.
b. Check U9.
A-9
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Table A-3. Overall Troubleshooting (Cont’d)
CHECKS AND PROBABLE CAUSES
SYMPTOM
Poor Load Regulation
(Constant Voltage)
a. Refer to "Measurements Techniques" paragraph.
b. Check +10 V reference voltage.
c. Ensure that the supply is not going into current limit.
Poor Load Regulation
(Constant Current)
a. Check +10 V reference voltage.
b. CR1, CR19, CR20, C2, C31 leaky.
c. Ensure that the supply is not crossing over to constant voltage operation.
Oscillates (Constant Voltage/
Constant Current)
a. Check C29 and C36 in constant voltage circuit.
b. Check C31 and C33 in constant current circuit.
Poor Stability
(Constant Voltage)
a. Check +10 V reference voltage.
b. CR27, CR28, CR23, and CR26 leaky.
c. U9 defective.
d. Noisy programming resistor R83.
Poor Stability
(Constant Current)
a. Check +10 V reference voltage.
b. CR24, CR25, CR29, and CR30 leaky.
c. U9 and U10 defective.
d. Noisy programming resistor R85.
Excessive heat
OVP Shutdown
a. Check preregulator control circuit. Refer to Table A-6.
b. CR10, CR12, CR15, and CR18 short
a. Check that the front panel OVP Adjust screw control is rotated fully clockwise.
b. Check the overvoltage protection circuit.
Refer to "Overvoltage Protection Circuit Troubles" paragraph or Table A-7.
Table A-4. High Output Voltage Troubleshooting
STEP
ACTION
RESPONSE
PROBABLE CAUSE
a. Q1 or Q4 shorted.
1
Check turn off of Q1 and
Q4 by shorting Q9 emitter
to collector.
a. Output voltage remains high.
b. Output voltage decreases.
b. Remove short and proceed to step 2.
2
3
Check turn on of Q9 by
shorting point 1 to -12 V.
a. Output voltage remains high.
b. Output voltage decreases.
a. Q9 open.
b. Remove short and proceed to step 3.
Check voltage from pin 5
to pin 6 of U9.
a. Input voltage is positive.
b. Input voltage is negative.
a. U9B is defective.
b. Turn down the voltage control fully
counter clockwise. Check the voltage
of U9 pin 1 is 0.
Table A-5. Low Output Voltage Troubleshooting
RESPONSE
STEP
ACTION
PROBABLE CAUSE
1
Check turn on of Q1 and
Q4 by disconnecting emitter
of Q9.
a. Output voltage remains low.
b. Output voltage increases.
a. Q1 or Q4 open.
b. Reconnect emitter lead and proceed to step 2.
2
3
Check turn off of Q9 by
shorting point 1 to +15 V.
a. Output voltage remains low.
b. Output voltage increases.
a. Q9 shorted.
b. Remove short and proceed to step 3.
Eliminate constant current
comparator as a source of
trouble by disconnecting
anode of CR22.
a. Output voltage is increases.
b. Output voltage remains low.
a. Proceed to step 4.
b. Reconnect lead and proceed to step 5.
A-10
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Table A-5. Low Output Voltage Troubleshooting (Cont’d)
STEP
ACTION
RESPONSE
PROBABLE CAUSE
4
Check voltage from pin 13 to
pin 12 of U9.
a. Measured voltage is positive.
b. Measured voltage is negative.
a. Check U9A is defective.
b. Check U10 and U9D is defective.
Check R85 is open.
5
Check voltage from pin 6
to pin 5 of U9.
a. Measured voltage is positive.
b. Measured voltage is negative.
a. U9B is defective.
b. Check U9C is defective.
Table A-6. Preregulator/Control Circuit Troubleshooting
MEASURE RESPONSE
STEP
PROBABLE CAUSE
1
Set output voltage to 4.5 V +- 0.5 V for E3614A.
Set output voltage to 10 V +- 1 V for E3615A.
Set output voltage to 15 V +- 1 V for E3616A.
Set output voltage to 26 V +- 5 V for E3617A.
2
E3614A
E3615A
Waveform form from
TP6(common) to point 6
a. Normal firing pulse
a. Check CR18, CR15, Q7, Q8
for defective.
b. No firing pulse
b. Proceed to step 3.
E3616A
Voltage from TP6
(common) to point 6
a. High voltage (+0.7 V)
a. CR15, CR18, U2, U21
defective
b. Low voltage (0 V)
b. Proceed to step 3.
3
4
5
6
Voltage from TP6(common) to
U4 pin 1
a. Low voltage (-12 V)
b. High voltage (+5 V)
a. U3 defective
b. Proceed to step 4.
Voltage from TP6(common) to
U5 pin 1
a. High voltage (+15 V)
b. Low voltage (-12 V)
a. U4 defective
b. Proceed to step 5.
Voltage from pin 6 to
pin 7 of U5
a. Measured voltage is positive.
b. Measured voltage is negative.
a. U5 defective
b. U6 defective
Set output voltage to 7 V +- 1 V for E3614A.
Set output voltage to 16 V +- 2 V for E3615A.
Set output voltage to 25 V +- 2 V for E3616A.
Set output voltage to 44 V +- 5 V for E3617A.
7
Waveform form from TP6
(common) to point 7
a. Normal firing pulse
a. CR10, CR12, Q5, Q6
defective
b. No firing pulse
b. Proceed to step 8.
8
9
Voltage from TP6(common)
to U4 pin 14
a. Low voltage (-12 V)
b. High voltage (+5 V)
a. U3 defective
b. Proceed to step 9.
Voltage from TP6(common)
to U5 pin 14
a. High voltage (+15 V)
b. Low voltage (-12 V)
a. U4 defective
b. Proceed to step 10.
10
Voltage from pin 8 to
pin 9 of U5
a. Measured voltage is positive.
b. Measured voltage is negative.
a. U5 defective
b. U6 defective
A-11
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Table A-7. Overvoltage Protection Circuit Troubleshooting
STEP
ACTION
RESPONSE
PROBABLE CAUSE
1
Short U19 pin 4 to TP6.
a. Shutdown release
(OVP indicator OFF)
b. Output voltage remains
shutdown(0 V)
a. U20 defective or C57
shorted.
b. Proceed to step 2.
2
3
Measure the voltage from
TP6(common) to TP9.
a. High voltage (+5 V)
b. Low voltage (0 V)
a. U19 defective or proceed step 3.
b. U4D defective.
Measure the voltage from
TP6(common) to TP8.
a. Below +2.6 V
b. Above +2.6 V
a. U12 or U8 defective
b. U18 defective
Table A-8. Reference Designators
REPLACEABLE PARTS
A
C
Assembly
Capacitor
Diode
INTRODUCTION
This section contains information for ordering replacement
parts. Table A-10 lists parts by reference designators and pro-
vides the following information:
CR
DS
F
Signaling Device(light)
Fuse
G
Pulse Generator
Jack
a. Reference designators. Refer to Table A-8.
b. Agilent Technologies Part Number.
c. Total quantity used in that assembly.
d. Description.
J
L
Inductor
Q
Transistor
Resistor
R
e. Manufacturer's supply code number. Refer to Table
A-9 for manufacturer's name and address.
f. Manufacturer's part number or type.
S
Switch
T
Transformer
Test Point
Zener Diode
Integrated Circuit
Wire
TP
VR
U
Mechanical and miscellaneous parts are not identified by ref-
erence designator.
W
ORDERING INFORMATION
To order a replacement part, address order or inquiry to your local Agilent Technologies sales office (see lists at rear of this manual for
addresses). Specify the following information for each part: Model, complete serial number of the power supply; Agilent Technologies
part number; circuit reference designator; and description.
Table A-9. Code List of Manufacturers
CODE
MANUFACTURER
Texas Instruments Inc, Semicon Comp Div.
ADDRESS
Dallas, TX
01295
14936
27014
28480
04713
32997
34371
General Instruments Corp, Semicon Prod
National Semiconductor Corporation
Agilent Technologies
Hicksville, N.Y.
Santa Clara, CA
Palo Alto, CA
Phoenix, AZ
Motorola Semiconductor Products
Bourns Inc.
Riverside, CA
Melbourne, FL
Harris Corp.
A-12
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Table A-10. Replaceable Parts List
Reference Designator
Agilent Part
Number
Q'ty
Description
Model
Mfr. P/N
Mfr.
Code
E3614A
1
1
1
1
60WBENCHPOWERSUPPLY-E3614AMODEL
60WBENCHPOWERSUPPLY-E3615AMODEL
60WBENCHPOWERSUPPLY-E3616AMODEL
60WBENCHPOWERSUPPLY-E3617AMODEL
E3615A
E3616A
E3617A
E3614-60005 1
E3615-60005 1
E3616-60005 1
E3617-60005 1
MAIN BODY ASSY
MAIN BODY ASSY
MAIN BODY ASSY
MAIN BODY ASSY
KEYCAP-WHT
KEYCAP-GRAY
14
28480
28480
28480
28480
28480
28480
15
16
17
0371-3806
0371-8624
1
1
ALL
ALL
E361X-60003 1
E361X-60009 1
FRONT PANEL ASSY
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
14
28480
28480
DISPLAYBOARDASSY
R84,85
2100-4503
2
RES-VAR10K5%10-TURNWW
BINDINGPOSTRED
3590S-A17-103 32997
28480
E3631-20011 1
E3631-20012 1
E3631-20013 1
BINDINGPOSTBLACK
28480
BINDINGPOSTGREEN
28480
2950-0144
5041-8621
3
2
NUT-BINDINGPOST
28480
KNOB
28480
E3614-60002 1
E3615-60002 1
E3617-60002 1
E3617-60002 1
MAIN BOARD ASSY
28480
MAIN BOARD ASSY
15
28480
MAIN BOARD ASSY
16
28480
MAIN BOARD ASSY
17
28480
5021-8128
5021-8139
0160-4835
0180-4360
0180-4355
0180-4452
0180-3595
0160-0269
0180-3990
0180-4567
0180-4568
0180-4607
0180-4566
0180-3970
0160-7449
0160-4832
0160-4835
1
1
3
1
1
1
1
2
1
2
2
2
2
5
3
5
1
PCBMAINFORE3614A,E3615A
PCBMAINFORE3616A,E3617A
CAP-FXD.1UF+-10%50VCERX7R
CAP-FXD1000UF25V+-20%AL-ELECTLT
CAP-FXD470UF50V+-20%AL-ELECTLT
CAP-FXD330UF63V+-20%AL-ELECTLT
CAP-FXD220UF100V+-20%AL-ELECTLT
CAP-FXD0.1UF+-20%500VCERZ5U
CAP-FXD4700UF+-20%25VAL-ELECTLT
CAP-FXD39000UF25V+-20%AL-ELECTLT
CAP-FXD12000UF63V+-20%AL-ELECTLT
CAP-FXD5600UF100V+-20%AL-ELECTLT
CAP-FXD2700UF160V+-20%AL-ELECTLT
CAP-FXD1UF+-20%50VAL-ELECTLT
CAP-FXD0.33UF+-10%50VPOLYE-FL
CAP-FXD0.01UF+-10%100VCERX7R
CAP-FXD.1UF+-10%50VCERX7R
CAP-FXD0.01UF+-10%100VCERX7R
14,15
16,17
ALL
14
28480
28480
C1,3,47
28480
C2
28480
C2
15
28480
C2
16
28480
C2
17
28480
C4,5
ALL
ALL
14
28480
C6
28480
C7,8
28480
C7,8
15
28480
C7,8
16
28480
C7,8
17
28480
C9,41,42,43,55
C10,48,49
C11,16,17,25,26
C12
ALL
ALL
14,15
14,15
ALL
28480
28480
28480
28480
C13,14,15,30,32,3 0160-4832
4,38,39,50,54
10
28480
A-13
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Table A-10. Replaceable Parts List (Cont'd)
Reference Designator
Agilent Part
Number
Q'ty
Description
Model
Mfr. P/N
Mfr.
Code
C18,21,24,27
C19,22
C20,23
C28
0160-7077
0160-4822
0180-3970
0160-6225
0160-4832
0160-7673
0160-7075
4
2
2
1
1
1
1
6
CAP-FXD.1UF+-10%630VPOLYE-FL
CAP-FXD1000PF+-5%100VCERCOG
CAP-FXD1UF+-20%50VAL-ELECTLT
CAP-FXD0.33UF+-10%250VPOLYE-MET
CAP-FXD0.01UF+-10%100VCERX7R
CAP-FXD.047UF+-10%100VPOLYP-MET
CAP-FXD4700PF+-2%50VPOLYP-FL
CAP-FXD1000PF+-5%100VCERCOG
14,15
14,15
14,15
ALL
28480
28480
28480
28480
28480
28480
28480
28480
C29
14,15
16,17
ALL
C29
C31
C33,35,44,45,46- 0160-4822
,56
ALL
C36
0160-7548
0160-4801
0160-7673
0180-4085
0180-4355
0180-4437
0160-4065
0160-7049
0160-7363
0160-4808
0160-0301
0811-3478
0811-3839
0811-3864
0811-3861
1
1
1
1
1
1
1
2
1
1
4
2
2
2
2
6
CAP-FXD2200PF+-10%50VCERY5P
CAP-FXD100PF+-5%100VCERCOG
CAP-FXD.047UF+-10%100VPOLYP-MET
CAP-FXD330UF+-20%35VAL-ELECTLT
CAP-FXD470UF50V+-20%AL-ELECTLT
CAP-FXD47UF+-20%50VAL-ELECTLT
CAP-FXD0.1UF+-20%250VPPR-MET
CAP-FXD4700PF+-20%250VCERX5V
CAP-FXD1UF+-10%250VPOLYP-MET
CAP-FXD470PF+-5%100VCERCOG
CAP-FXD0.012UF+-10%200VPE-FL
RESISTOR0.1+-1%5WPWNTC=0+-90
RESISTOR0.2+-1%5WPWNTC=0+-90
RESISTOR0.6+-5%5WPWNTC=0+-90
RESISTOR1.78+-1%5WPWNTC=0+-90
RESISTOR31.6K+-1%.125WTFTC=0+-100
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
16,17
16,17
17
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
C37
C40
C52
C53
C57
C58
C59,60
C61
C62
C63,64,65,66
R1,2
R1,2
R1,2
R1,2
14
15
16
17
R3,7,21,22,105,10 0698-3160
6
ALL
R4,71,73,76,112
R5,6,80
R8,9,12
R8,9
0757-0465
0757-0401
0757-0280
0761-0021
0699-2715
0811-1806
0811-2188
0764-0007
0699-3105
0757-0461
0698-3157
0757-0442
0757-0465
5
3
3
2
2
1
1
1
1
1
3
1
1
6
RESISTOR100K+-1%.125WTFTC=0+-100
RESISTOR100+-1%.125WTFTC=0+-100
RESISTOR1K+-1%.125WTFTC=0+-100
RESISTOR1K+-5%1WTFTC=0+-100
RESISTOR-FUSE1OHM+-5%;0.5W@70
RESISTOR2K+-5%3WPWI20PPM
ALL
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
ALL
14,15
16,17
ALL
R10,108
R11
14
R11
RESISTOR5K+-5%3WPWI20PPM
15
R11
RESISTOR27K+-5%2WMOTC=0+-200PPM
RESISTOR45K+-5%2WMOTC=0+-500PPM
RESISTOR68.1K+-1%.125WTFTC=0+-100
RESISTOR19.6K+-1%.125WTFTC=0+-100
RESISTOR10K+-1%.125WTFTC=0+-100
RESISTOR100K+-1%.125WTFTC=0+-100
RESISTOR1K+-1%.125WTFTC=0+-100
16
R11
17
R13
14,15
14,15
14,15
14,15
ALL
R14,48,52
R15
R16
R17,18,66,78,110, 0757-0280
123
R19,113
R20,23
0698-0083
0757-0463
2
2
RESISTOR1.96K+-1%.125WTFTC=0+-100
RESISTOR82.5K+-1%.125WTFTC=0+-100
ALL
ALL
28480
28480
A-14
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Table A-10. Replaceable Parts List (Cont'd)
Reference Designator
Agilent Part
Number
Q'ty
Description
Model
Mfr. P/N
Mfr.
Code
R24,26,27,37,38, 0757-0442
64,88,117,120
9
RESISTOR10K+-1%.125WTFTC=0+-100
ALL
28480
R25,30,33
R28,111
0698-8824
0698-3228
3
RESISTOR562K+-1%.125WTFTC=0+-100
RESISTOR49.9K+-1%.125WTFTC=0+-100
RESISTOR46.4K+-1%.125WTFTC=0+-100
ALL
ALL
ALL
28480
28480
28480
2
R29,68,86,89,91, 0698-3162
9-
11
2,95,96,99,114,12
1
R31,32,35
R34
0698-0084
0757-0288
0698-3518
0757-0439
0757-0441
0698-8580
0757-0440
0698-4471
0698-3498
0757-0442
0757-0431
0698-4438
0698-0063
0757-0439
0698-4473
0757-0454
0698-4503
0757-0467
0757-0346
0698-3438
0757-0293
0757-0401
0757-0489
0698-4123
0757-0293
0811-3909
0811-3909
0811-4118
0811-3861
0811-1799
0813-0001
0811-0071
0811-1808
0698-0085
0698-7634
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
4
2
4
2
2
2
2
1
1
2
1
1
1
1
1
1
RESISTOR2.15K+-1%.125WTFTC=0+-100
RESISTOR9.09K+-1%.125WTFTC=0+-100
RESISTOR7.32K+-1%.125WTFTC=0+-100
RESISTOR6.81K+-1%.125WTFTC=0+-100
RESISTOR8.25K+-1%.125WTFTC=0+-100
RESISTOR9.53K+-1%.125WTFTC=0+-100
RESISTOR7.5K+-1%.125WTFTC=0+-100
RESISTOR7.15K+-1%.125WTFTC=0+-100
RESISTOR8.66K+-1%.125WTFTC=0+-100
RESISTOR10K+-1%.125WTFTC=0+-100
RESISTOR2.43K+-1%.125WTFTC=0+-100
RESISTOR3.09K+-1%.125WTFTC=0+-100
RESISTOR5.23K+-1%.125WTFTC=0+-100
RESISTOR6.81K+-1%.125WTFTC=0+-100
RESISTOR8.06K+-1%.125WTFTC=0+-100
RESISTOR33.2K+-1%.125WTFTC=0+-100
RESISTOR66.5K+-1%.125WTFTC=0+-100
RESISTOR121K+-1%.125WTFTC=0+-100
RESISTOR10+-1%.125WTFTC=0+-100
RESISTOR147+-1%.125WTFTC=0+-100
RESISTOR1.96K+-1%.125WTFTC=0+-100
RESISTOR100+-1%.125WTFTC=0+-100
RESISTOR10+-1%.25WTFTC=0+-100
RESISTOR499+-1%.125WTFTC=0+-100
RESISTOR1.96K+-1%.125WTFTC=0+-100
RESISTOR0.2+-1%10WPWNTC=0+-90
RESISTOR0.2+-1%10WPWNTC=0+-90
RESISTOR0.6+-1%10WPWNTC=0+-90
RESISTOR1.78+-1%5WPWNTC=0+-90
RESISTOR390+-5%3WPWITC=0+-20
ALL
ALL
14
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
R36
R36
15
R36
16
R36
17
R39
14
R39
15
R39
16
R39
17
R40
14
R40
15
R40
16
R40
17
R41
14
R41
15
R41
16
R41
17
R42,44,54,56
R42,44,54,56
R43,55
R43,45,55,57
R46,53
R47,50
R49,51
R58,59
R58
14,15
16,17
16,17
14,15
14,15
14,15
14,15
14
15
R58
16
R58,59
R60
17
14
R60
RESISTOR1K+-5%3WPWITC=0+-20
15
R60
RESISTOR1.52K+-5%3WPWITC=0+-20
RESISTOR2.6K+-5%3WPWITC=0+-20
RESISTOR2.61K+-1%.125WTFTC=0+-100
RESISTOR42.2K+-1%.125WTFTC=0+-100
16
R60
17
R61
ALL
14
R62
A-15
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R62
R62
0698-4514
0757-0481
1
1
RESISTOR105K+-1%.125WTFTC=0+-100
RESISTOR475K+-1%.125WTFTC=0+-100
Table A-10. Replaceable Parts List (Cont'd)
15
16
28480
28480
Reference Designator
Agilent Part
Number
Q'ty
Description
Model
Mfr. P/N
Mfr.
Code
R62
0698-8826
0698-8827
0757-0274
0757-0438
2100-4306
0698-3243
0698-3459
0698-3158
0757-0465
0757-0289
0757-0290
0757-0458
0698-8123
0757-0444
0698-3245
0698-3136
0698-3430
0757-0395
0698-4767
0698-3460
0698-8825
0698-8827
0698-3157
0698-8123
0757-0461
0757-0440
0698-3444
0757-0346
0698-3581
2100-4357
2100-4305
0698-3455
0757-0465
0757-0461
0698-3160
0698-4123
0698-3441
0698-3438
0757-0428
0698-3156
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
1
1
1
1
1
1
2
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
2
RESISTOR825K+-1%.125WTFTC=0+-100
RESISTOR1M+-1%.125WTFTC=0+-100
RESISTOR1.21K+-1%.125WTFTC=0+-100
RESISTOR5.11K+-1%.125WTFTC=0+-100
RESISTOR-TRMR50K10%TKFTOP-ADJ25-T
RESISTOR178K+-1%.125WTFTC=0+-100
RESISTOR383K+-1%.125WTFTC=0+-100
RESISTOR23.7K+-1%.125WTFTC=0+-100
RESISTOR100K+-1%.125WTFTC=0+-100
RESISTOR13.3K+-1%.125WTFTC=0+-100
RESISTOR6.19K+-1%.125WTFTC=0+-100
RESISTOR51.1K+-1%.125WTFTC=0+-100
RESISTOR26.1K+-1%.125WTFTC=0+-100
RESISTOR12.1K+-1%.125WTFTC=0+-100
RESISTOR20.5K+-1%.125WTFTC=0+-100
RESISTOR17.8K+-1%.125WTFTC=0+-100
RESISTOR21.5+-1%.125WTFTC=0+-100
RESISTOR56.2+-1%.125WTFTC=0+-100
RESISTOR147K+-1%.125WTFTC=0+-100
RESISTOR422K+-1%.125WTFTC=0+-100
RESISTOR681K+-1%.125WTFTC=0+-100
RESISTOR1M+-1%.125WTFTC=0+-100
RESISTOR19.6K+-1%.125WTFTC=0+-100
RESISTOR26.1K+-1%.125WTFTC=0+-100
RESISTOR68.1K+-1%.125WTFTC=0+-100
RESISTOR7.5K+-1%.125WTFTC=0+-100
RESISTOR316+-1%.125WTFTC=0+-100
RESISTOR10+-1%.125WTFTC=0+-100
RESISTOR13.7K+-1%.125WTFTC=0+-100
RESISTOR-VAR10K+-10%
17
28480
28480
28480
28480
32997
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
R63
ALL
ALL
ALL
ALL
14
R65
R67
R69
3296Y-1-503
R70
R70
15
R70
16
R70
17
R72
14
R72
15
R72
16
R72
17
R74,75
R74,75
R74,75
R77
14,15
16
17
14,15
16,17
14
R77
R79
R79
15
R79
16
R79
17
R81,122
R82
ALL
14,15
16,17
ALL
ALL
ALL
ALL
ALL
ALL
14
R82
R83,119
R87
R90
R93
R94
52UAL-T22-A15 32997
R97
RESISTOR-TRMR10K10%TKFTOP-ADJ25-T
RESISTOR261K+-1%.125WTFTC=0+-100
RESISTOR100K+-1%.125WTFTC=0+-100
RESISTOR68.1K+-1%.125WTFTC=0+-100
RESISTOR31.6K+-1%.125WTFTC=0+-100
RESISTOR499+-1%.125WTFTC=0+-100
RESISTOR215+-1%.125WTFTC=0+-100
RESISTOR147+-1%.125WTFTC=0+-100
RESISTOR1.62K+-1%.125WTFTC=0+-100
RESISTOR14.7K+-1%.125WTFTC=+-100
3296Y-1-103
32997
28480
28480
28480
28480
28480
28480
28480
28480
28480
R98
R98
15
R98
16
R98
17
R100
R101
R102
R103
R104,107
ALL
ALL
ALL
ALL
ALL
A-16
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R109
R115
0698-3153
0757-0462
1
1
RESISTOR3.83K+-1%.125WTFTC=0+-100
RESISTOR75K+-1%.125WTFTC=0+-100
Table A-10. Replaceable Parts List (Cont'd)
ALL
14
28480
28480
Reference Designator
Agilent Part
Number
Q'ty
Description
Model
Mfr. P/N
Mfr.
Code
R115
0757-0463
0757-0462
0757-0461
0698-4489
0698-3161
0698-4494
0698-8678
0698-8812
0698-8825
0757-0401
1826-0144
1826-0346
1826-0412
1826-0138
1826-0665
1826-1297
1990-1659
1826-1702
1826-1075
1826-0468
1826-0393
1826-0221
1826-0346
1820-1197
1990-1659
1855-0989
1855-0536
1854-0477
1854-0477
1853-0281
1853-0041
1901-1273
1906-0284
1901-0033
1
1
1
1
1
1
1
1
1
1
1
1
3
2
2
3
1
1
1
1
1
1
1
1
4
2
2
4
4
2
1
2
1
5
6
5
2
1
RESISTOR82.5K+-1%.125WTFTC=0+-100
RESISTOR75K+-1%.125WTFTC=0+-100
RESISTOR68.1K+-1%.125WTFTC=0+-100
RESISTOR28K+-1%.125WTFTC=0+-100
RESISTOR38.3K+-1%.125WTFTC=0+-100
RESISTOR35.7K+-1%.125WTFTC=0+-100
RESISTOR178+-1%.125WTFTC=0+-100
RESISTOR1+-1%.125WTFTC=0+-100
RESISTOR681K+-1%.125WTFTC=0+-100
RESISTOR100+-1%.125WTFTC=0+-100
ICVRGLTR-FXD-POS4.8/5.2VTO-220PKG
ICOPAMPGPDUAL8PINDIP-P
15
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
04713
27014
27014
27014
27014
27014
14936
28480
27014
04713
27014
04713
27014
01295
14936
28480
28480
04713
04713
04713
04713
14936
14936
27014
14936
04713
14936
14936
R115
16
R115
17
R116
14
R116
15,16
17
R116
R118
ALL
16,17
16,17
ALL
ALL
R124
R125
R126
U1
MC7805CT
U2
14,15 LM358N
U3,16,20
U4,5
ICCOMPARATORPRCNDUAL8PINDIP-P
ICCOMPARATORGPQUAD14PINDIP-P
ICOPAMPLOW-BIAS-H-IMPDQUAD14PIN
ALL
ALL
ALL
LM393N
LM339
U6,9
LF347BN
LM336BZ-5.0
MCP3020Z
U7,15,17
U8
ICVRGLTR-V-REF-FXD4.8/5.2VTO-92PKG ALL
OPTO-ISOLATORLED-TRIACIF=100MA-MAX
ICOPAMPPRCN8PINDIP-P
ALL
ALL
ALL
ALL
ALL
U10
U11
ICOPAMPGPDUAL8PINDIP-P
LF442CN
MC3423P1
LM317T
U12
ICVRGLTR-OV-V-SEN2.3/37.8V8-DIP-P
ICVRGLTR-ADJ-POS1.2/37VTO-220PKG
U13
U14
ICVRGLTR-FXD-NEG-11.5/-12.5VTO-220 ALL
MC7912CT
LM358N
U18
ICOPAMPGPDUAL8PINDIP-P
ALL
ALL
U19
ICGATETTL/LSNANDQUAD2-INP
OPTO-ISOLATORLED-TRIACIF=100MA-MAX
SN74LS00N
U21,22,23,24
Q1,4
16,17 MCP3020Z
TRANSISTORMOSFETN-CHANE-MODETO247AC 14,15 IRFP044
TRANSISTORMOSFETN-CHANE-MODETO-3SI 16,17
Q1,4
Q2,3,10,11
Q5,6,7,8
Q6,7
TRANSISTORNPN2N2222ASITO-18PD=500MW ALL
2N2222A
TRANSISTORNPN2N2222ASITO-18PD=500MW 14,15 2N2222A
TRANSISTORPNP2N2907ASITO-18PD=400MW 16,17 2N2907A
Q9
TRANSISTORPNPSITO-39PD=1WFT=60MHZ
DIODE-PWRRECT100V6A35NS
DIODE-FWBRIDGE100V1A
ALL
ALL
ALL
MM5007
FE6B
CR1,19
CR2
DF01
CR3,4,5,6,7
DIODE-GENPRP180V200MADO-35
DIODE-PWRRECT400V1A50NSDO-41
THRYSTER-SCRTO-220ABVRRM=200V
DIODE-PWRRECT400V1A50NSDO-41
DIODE-BRIDGE600V6A
14,15 1N645
CR8,9,16,17,31,32 1901-1149
CR10,12,15,18,20 1884-0332
ALL
ALL
UF4004
MCR264-4
CR11,14
CR13
1901-1149
1906-0400
14,15 UF4004
ALL GBU8J
A-17
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Table A-10. Replaceable Parts List (Cont'd)
Reference Designator
Agilent Part
Number
Q'ty
Description
Model
Mfr. P/N
Mfr.
Code
CR21,22,23,24,25, 1901-0033
26,27,28,29,30
10
DIODE-GENPRP180V200MADO-35
ALL
1N645
27014
VR1,2,3
RT1,2
C67
1902-0579
0837-0261
0160-0263
3
2
1
DIODE-ZNR5.1V5%PD=1WIR=10UA
DIODE-VARISTOR
ALL
ALL
ALL
1N4733APL
V275LA20A
04713
34371
CAP-FXD0.22uF+-20%50VCER
MAGNETIC DEVICE
T1
9100-5068
9100-5069
NOP/N
1
1
1
1
2
1
TRANSFORMER-POWER
TRANSFORMER-POWER
TRANSFORMER-POWER
TRANSFORMER-POWER
TRANSFORMER-PULSE;PRIIND:5MH
CORE-SHIELDINGBEAD
14
28480
28480
28480
28480
28480
28480
T1
15
T1
16
T1
9100-5070
9100-4969
9170-0894
17
T2,3
L1
14,15
ALL
MISCELLANEOUS
J1
1252-4159
1
CONNECTOR-POSTTYPE2.5-PIN-SPCG11-CO- ALL
NT
28480
TP1-16
0360-2359
3101-3237
3101-3238
3101-1914
3101-3115
3101-3083
0360-2548
0360-2545
0360-2546
0360-2547
16
4
TERMINAL-TESTPOINT.230INABOVE
SWITCH-SLSPDTSUBMIN6A250VAC
SWITCH-SLDPDTSUBMIN6A250VAC
SWITCH-SL2-DPDTSTD1.5A250VACPC
SWITCH-PBMOM.5A250VAC
SWITCH-PBDPSTALTNG6A250VAC
TERMINALBLOCK
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
28480
28480
28480
28480
28480
28480
28480
28480
28480
28480
S1,2,3,4
S5
S6
S7
S8
1
1
1
1
3
1
TERMINALBLOCK
9
TERMINALBLOCK
1
TERMINALBLOCK
A-18
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Table A-11. Component Value
Component
Model
E3614A
E3615A
E3616A
E3617A
C2
C7,8
1000UF25V+-20%AL-ELECTLT
39000UF25V+-20%AL-ELECTLT
470UF50V+-20%AL-ELECTLT
12000UF63V+-20%AL-ELECTLT
0.01UF100V+-10%CERX7R
0.1UF50V+-10%CERX7R
0.1UF630V+-10%POLYE-FL
1000PF100V+-5%COG
330UF50V+-20%AL-ELECTLT
5600UF100V+-20%AL-ELECTLT
220UF100V+-20%AL-ELECTLT
2700UF160V+-20%AL-ELECTLT
C11,16,17,25,26 0.01UF100V+-10%CERX7R
C12
0.1UF50V+-10%CERX7R
0.1UF630V+-10%POLYE-FL
1000PF100V+-5%COG
C18,21,24,27
C19,22
C20,23
C29
1UF50V+-20%AL-ELECTLT
0.01UF100V+-10%CERX7R
1UF50V+-20%AL-ELECTLT
0.01UF100V+-10%CERX7R
0.047UF100V+-10%POLYP-MET
1UF+-10%250VPOLYP-MET
470PF+-5% 100VCERCOG
0.047UF100V+-10%POLYP-MET
1UF+-10%250VPOLYP-MET
470PF+-5% 100VCERCOG
0.012UF+-10%200VPE-FL
1.78+-1%5W
C61
C62
C63,64,65,66
R1,2
0.1+-1%5W
0.2+-1%5W
0.6+-5%5W
1K+-5%1W
27k+-5%2W
R8,9
1K1%.125W
1K1%.125W
1K+-5%1W
R11
2K+-5%3W
5K+-5%3W
45K+-5%2W
R12
1K+-1%.125W
68.1K+-1%.125W
19.6K+-1%.125W
10K+-1%.125W
100K+-1%.125W
7.32K+-1%.125W
7.5K+-1%.125W
2.43K+-1%.125W
8.06K+-1%.125W
10+-1%.125W
100+-1%.125W
100+-1%.125W
10+-1%.25W
1K+-1%.125W
68.1K+-1%.125W
19.6K+-1%.125W
10K+-1%.125W
100K+-1%.125W
6.81K+-1%.125W
7.15K+-1%.125W
3.09K+-1%.125W
33.2K+-1%.125W
10+-1%.125W
100+-1%.125W
100+-1%.125W
10+-1%.25W
R13
R14,48,52
R15
R16
R36
8.25K+-1%.125W
8.66K+-1%.125W
5.23K+-1%.125W
66.5K+-1%.125W
147+-1%.125W
1K+-1%.125W
9.53K+-1%.125W
10K+-1%.125W
6.81K+-1%.125W
121K+-1%.125W
147+-1%.125W
1K+-1%.125W
R39
R40
R41
R42,44,54,56
R43,55
R45,57
R46,53
R47,50
R49,51
R58
499+-1%.125W
1.96K+-1%.125W
0.2+-1%10W
499+-1%.125W
1.96K+-1%.125W
0.2+-1%10W
0.6+-1%10W
1.78+-1%5W
R59
0.2+-1%10W
1.78+-1%5W
R60
390+-5%3W
1K+-5%3W
1.52K+-5%3W
2.6K+-5%3W
R62
42.2K+-1%.125W
178K+-1%.125W
13.3K+-1%.125W
12.1K+-1%.125W
21.5+-1%.125W
147K+-1%.125W
26.1K+-1%.125W
261K+-1%.125W
75K+-1%.125W
28K+-1%.125W
105K+-1%.125W
383K+-1%.125W
6.19K+-1%.125W
12.1K+-1%.125W
21.5+-1%.125W
422K+-1%.125W
26.1K+-1%.125W
100K+-1%.125W
82.5K+-1%.125W
38.3K+-1%.125W
475K+-1%.125W
23.7K+-1%.125W
51.1K+-1%.125W
20.5+-1%.125W
56.2+-1%.125W
681K+-1%.125W
68.1K+-1%.125W
68.1K+-1%.125W
75K+-1%.125W
825K+-1%.125W
100K+-1%.125W
26.1K+-1%.125W
17.8K+-1%.125W
56.2+-1%.125W
1M+-1%.125W
R70
R72
R74,75
R77
R79
R82
68.1K+-1%.125W
31.6K+-1%.125W
68.1K+-1%.125W
35.7K+-1%.125W
1+-1%.125W
R98
R115
R116
38.3K+-1%.125W
1+-1%.125W
R124
R125
681K+-1%.125W
MOSFETN-CHANE-MODETO3SI
681K+-1%.125W
MOSFETN-CHANE-MODETO3SI
Q1,4
MOSFETN-CHANE-MODETO204AE
NPN2N2222ASITO-18PD=500MW2
NPN2N2222ASITO-18PD=500MW2
ICOPAMPGPDUAL8PINDIP-P
MOSFETN-CHANE-MODETO204AE
NPN2N2222ASITO-18PD=500MW
NPN2N2222ASITO-18PD=500MW2
ICOPAMPGPDUAL8PINDIP-P
Q5,8
Q6,7
PNP2N2907ASITO-18PD=400MW
OPTO-ISOLATORLED-TRIAC
PNP2N2907ASITO-18PD=400MW
OPTO-ISOLATORLED-TRIAC
U2
U21,22,23,24
CR3,4,5,6,7
CR11,14
T1
DIODE-GENPRP180V200MAD0-35
DIODE-GENPRP180V200MAD0-35
DIODE-PWRRECT400V1A50NSDO-41 DIODE-PWRRECT400V1A50NSDO-41
TRANSFORMER-POWERFORE3614A TRANSFORMER-POWERFORE3615A
TRANSFORMER-POWERFORE3616A
TRANSFORMER-POWERFORE3617A
T2,3
TRANSFORMER-PULSE;PRIIND:5MH TRANSFORMER-PULSE;PRIIND:5MH
A-19
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Manual Supplement
Supplement Agilent Part Number : 5959-5336, Edition 4
Supplement Print Date : 14 April, 2000
This supplement updates the following document:
Agilent E361XA 60W Series Lab Bench DC Power Supplies
Manual Agilent Part Number : 5959-5310
What is a manual supplement?
A manual supplement keeps your manual up-to-date. The supplement, which
consists of additional pages for your manual, is shipped with the manual that it
updates. Additional pages have page numbers with a lower-case letter. For
example, if one additional page is added between pages 1-10 and 1-11, it will be
numbered 1-10-1.
This supplement is new information that was not described in the manual
for remote programming of the E3614A/E3615A/E3616A/E3617A with a voltage
or current source and resistors.
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Voltage and Current Programming of the E3614A/15A/16A/
17A with a Voltage and Current Source
Remote analog voltage programming permits control of the regulated output voltage
or current by means of a remotely varied voltage or current. The stability of the
programming voltages directly affects the stability of the output. The voltage control
or current control on the front panel are disabled during analog programming.
N O T E
The CV(-) terminal on the rear panel is internally connected to the plus output
terminal. In following connections, it is recommended to use Figure 2, Figure 4, or
Figure 6 if the negative terminal of the “Programming Voltage” is not floted from
its circuits.
Constant Voltage Mode
The programming voltage is not isolated from the power supply output. The power
supply may be programmed with a voltage that is common to either the plus output,
or the minus output.
Programming Voltage Common to the Plus output
Figure 1
Set the CV switch down on the rear panel, and all others up.
Vin = 1/A x Vout
Vout = A x Vin
Where
Vout is the power supply output voltage.
Vin is the programming voltage.
A is the gain factor and the values of each model are as below.
Model
E3614A
A
1/A
0.8
2.0
3.5
6.0
1.25
0.5
E3515A
E3616A
E3617A
0.29
0.17
1-10-1
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Programming Voltage Common to the Minus Output
Figure 2
Set the CV switch down on the rear panel, and all others up.
Vin = 1/A x Vout
Vout = A x Vin
Where
Vout is the power supply output voltage.
Vin is the programming voltage.
A is the gain factor and the values of each model are as below.
Model
E3614A
A
1/A
0.44
0.67
0.78
0.86
2.25
1.5
E3515A
E3616A
E3617A
1.29
1.17
Alternative Voltage Programming Using Resistors
Programming Voltage Common to the Plus Output
Figure 3
The M/S2 switch must be in the down position. For best results, place a 0.1µF capacitor in
parallel with R2.
Vin = (R1/R2) x Vout
Vout = (R2/R1) x Vin
Where
Vout is the power supply output voltage.
Vin is the programming voltage.
R1 and R2 should be in the 1KΩ to 100KΩ range.
1-10-2
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Programming Voltage Common to the Minus Output
Figure 4
The output will always be the same or less than the programming voltage.
The M/S2 switch must be in the down position. For best results, place a 0.1µF capacitor
in parallel with R2.
Vin = (R1ꢀR2) / R2 x Vout
Vout = R2 / ꢁR1+R2) x Vin
Where
Vout is the power supply output voltage.
Vin is the programming voltage.
R1 and R2 should be in the 1KΩ to 100KΩ range.
1-10-3
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Constant Current Mode
The E3614A/15A/16A/17A may be programmed for constant current with an analog
voltage or current. Constant current with analog voltage programming can only be
achieved with a voltage source that is common with the positive output terminal.
Constant Current with Voltage Programming
Figure 5
Set the CC switch down the rear panel, and all others up.
Vin = 1/A x Iout
Iout = A x Vin
Where
Iout is the power supply output current.
Vin is the programming voltage.
A is the transconductance in Amp/Volt and the values of each
model are as below.
Model
E3614A
A (A/V)
1/A (V/A)
1.67
0.6
0.3
E3515A
E3616A
E3617A
3.33
6.0
10
0.17
0.1
Constant Current with Current Programming
When using current to program the power supply, the source must have a
dynamic range of 10 volts when the programming source is common to the plus
output and 10 volts plus the maximum output voltage expected when the
programming source is common to the minus output of the power supply.
The load to the power supply must be stable for the constant current
output to be accurate. Current transient response is not specified,
and depends on the change of the output voltage of the power supply.
1-10-4
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Figure 6
Set the CC switch down, and all others up.
Iin = 1/A x Iout
Iout = A x Vin
Where
Iout is the power supply output current in amps.
Iin is the programming current in µamps.
A is the gain.
Model
E3614A
A (A/µA)
0.055
1/A (µV/A)
18
E3515A
E3616A
E3617A
0.0278
0.0158
0.00928
35.9
63.4
108
Programming currents can be increased by adding a resistor across the CC+ and CC-. A
10 volts drop across R1 represents full scale current of the power supply. When a 1 kohm
resistor is added across R1, the programming currents are as follows with the
programming current in mA.
Parallel resistor required for a
Model
E3614A
A (A/mV)
0.594
1/A (mA/A)
1.69
1 amp/mamp value of A (kohm)
1.7
E3515A
E3616A
E3617A
0.297
0.168
0.0989
3.37
5.95
1.01
3.45
6.28
11.2
Current Monitoring
Current of the power supply can be monitored across the internal current monitoring
resistor. One side of the resistor is at the +output and A3; the other side of the resistor
is at A1. The table below shows the resistor value and conversion factors. To obtain
the current divide the measured voltage by the resistor value or multiply the amps/V
times the voltage measured.
Resistor
Model
E3614A
amps/V
value (Ω)
0.1
10
E3515A
E3616A
E3617A
0.2
5
0.6
1.67
1.12
0.89
1-10-5
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Voltage and Current Programming of the
E3614A/15A/16A/17A with Resistors
Remote programming with resistors permits control of the regulated output or current
by means of a remotely varied resistor. The sum of the resistance of external
programming resistors (R1 + R2) should be more than 40 kohm. To have more precise
output voltage, use a variable resistor more than 40 kohm. The voltage control on the
front panel is disabled during remote resistor programming.
N O T E
Do not operate the power supply simultaneously in the remote analog voltage
programming and in the remote resistor programming.
Remote Resistor Programming Connections
Remote resistor programming requires changing the setting of the switches and
connecting external resistors between “+” and “`-” terminals of “CV” and “VREF”
terminal or “+” and “-” terminals of “CC” and “VREF” terminal. Any noise picked up
on the programming leads will appear on the power supply's output and may degrade
regulation. To reduce noise pickup, use a twisted or shielded pair of wires for
programming, with the shield grounded at one end only.
Remote Resistor Programming, Constant Voltage
Figure 7
Set the CV switch down on the rear panel, and all others up.
V
out = A x [VREF x {R/(R + R2 + 100)}]
Where out is the power supply output voltage.
A is the gain factor and the values of each model are as below.
REF is between 10.11 V and 11.40 V.
V
V
R = (92800 x R1)/(92800 + R1)
R1 + R2 > 40 kohm
Model
E3614A
A
0.8
2.0
3.5
6.0
E3515A
E3616A
E3617A
1-10-6
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Remote Resistor Programming, Constant Current
Figure 8
Set the CC switch down on the rear panel, and all others up.
I
out = A x [VREF x {R/(R + R2 + 100)}]
Where out is the power supply output current.
A is the gain factor and the values of each model are as below.
REF is between 10.11 V and 11.40 V.
I
V
R = (92800 x R1)/(92800 + R1)
R1 + R2>> 40 kohm
Model
E3614A
A
0.6
E3515A
E3616A
E3617A
0.3
0.17
0.1
1-10-7
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Iꢀ
CERTIFICATION
Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory. Agilent
Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Stan-
dards and Technology (formerly National Bureau of Standards), to the extent allowed by that organization's calibration facility,
and to the calibration facilities of other International Standards Organization members.
WARRANTY
This Agilent Technologies hardware product is warranted against defects in material and workmanship for a period of three
years from date of delivery. Agilent software and firmware products, which are designated by Agilent for use with a hardware
product and when properly installed on that hardware product, are warranted not to fail to execute their programming instruc-
tions due to defects in material and workmanship for a period of 90 days from date of delivery. During the warranty period,
either Agilent or Agilent Technologies will, at its option, either repair or replace products which prove to be defective. Agilent
does not warrant that operation the software, firmware, or hardware shall be uninterrupted or error free.
For warranty service, with the exception of warranty options, this product must be returned to a service facility designated by
Agilent. Return to Englewood Colorado Service Center for repair in United States(1-800-258-5165). Customer shall prepay
shipping charges by (and shall pay all duty and taxes) for products returned to Agilent for warranty service. Except for the
products returned to Customer from another country, Agilent shall pay for return of products to Customer.
Warranty services outside the country of initial purchase are included in Agilent's product price, only if Customer pays Agilent
international prices (defined as destination local currency price, or U.S. or Geneva Export price).
If Agilent is unable, within a reasonable time, to repair or replace any product to condition as warranted, the Customer shall
be entitled to a refund of the purchase price upon return of the product to Agilent.
The warranty period begins on the date of delivery or on the date of installation if installed by Agilent.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer, Cus-
tomer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental specifica-
tions for the product, or improper site preparation and maintenance. TO THE EXTENT ALLOWED BY LOCAL LAW, NO
OTHER WARRANTY IS EXPRESSED OR IMPLIED. AND AGILENT SPECIFICALLY DISCLAIMS THE IMPLIED WARRAN-
TIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
For consumer transactions in Australia and New Zealand:
The warranty terms contained in this statement, except to the extent lawfully permitted, do not exclude, restrict or modify and
are in addition to the mandatory rights applicable to the sale of this product to you.
EXCLUSIVE REMEDIES
TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER'S SOLE AND
EXCLUSIVE REMEDIES. AGILENT SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
ASSISTANCE
The above statements apply only to the standard product warranty. Warranty options, extended support contacts, product
maintenance agreements and customer assistance agreements are also available. Contact your nearest Agilent Technolo-
gies Sales and Service office for further information on Agilent's full line of Support Programs.
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DECLARATION OF CONFORMITY
according to ISO/IEC Guide 22 and EN 45014
Manufacturer’s Name:
Agilent Technologies, Inc.
Manufacturer’s Address:
345-15, Kasan-dong, Kumchon-ku,
Seoul 153-023 Korea
declares, that the products
Product Name:
DC Power Supply
Model Numbers:
E3614A, E3615A, E3614A, E3615A, and E3617A
All Options
Product Options:
conforms to the following Product Specifications:
Safety:
EMC:
IEC 1010-1:1990+A1:1992 / EN 61010-1:1993
1)
CISPR 11:1990 / EN 55011:1991 - Group 1 Class A
EN 50082-1:1992
IEC 801-2 : 1991 - 4KV CD, 8KV AD
IEC 801-3 : 1984 - 3V/m
IEC 801-4 : 1988 - 1kV Power Lines
0.5kV Signal Lines
Supplementary Information: The product herewith comply with the requirements of the
Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC and carry the “CE”
mark accordingly.
1)
The products was tested in a typical configuration with Agilent Technologies Test System.
Seoul, Korea
November 1, 1999
Quality Manager
European Contact for regulatory topics only: Hewlett-Packard GmbH, HQ-TRE, Herrenberger Strabe 110-140,
D-71034 Böbligen (FAX: +49-7031-143143).
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