Agilent Technologies 6030A, 6031A, 6032A, 6035A User Manual
SERVICE MANUAL
AUTORANGING
SYSTEM DC POWER SUPPLY
AGILENT MODELS 6030A, 6031A,
6032A and 6035A
FOR INSTRUMENTS WITH SERIAL NUMBERS
Agilent Model 6030A; Serials US38320301 and above
Agilent Model 6031A; Serials US38310376 and above
Agilent Model 6032A; Serials US38321026 and above
Agilent Model 6035A; Serials US38320281 and above
For instruments with higher serial numbers, a change page may be included.
5
Agilent Part No. 5959-3344 Printed in USA
Microfiche Part No. 5959-3345 September, 2000
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 Bureau of
Standards, to the extent allowed by the Bureau'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 Technologies software and firmware products, which are designated by Agilent
Technologies for use with a hardware product and when properly installed on that hardware product, are warranted not to
fail to execute their programming instructions due to defects in material and workmanship for a period of 90 days from date
of delivery. During the warranty period Agilent Technologies will, at its option, either repair or replace products which
prove to be defective. Agilent Technologies does not warrant that the operation of 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 Technologies. Customer shall prepay shipping charges by (and shall pay all duty and taxes) for products returned
to Agilent Technologies for warranty service. Except for products returned to Customer from another country, Agilent
Technologies shall pay for return of products to Customer.
Warranty services outside the country of initial purchase are included in Agilent Technologies product price, only if
Customer pays Agilent Technologies international prices (defined as destination local currency price, or U.S. or Geneva
Export price).
If Agilent Technologies 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.Technologies.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer,
Customer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental
specifications for the product, or improper site preparation and maintenance. NO OTHER WARRANTY IS EXPRESSED
OR IMPLIED. AGILENT TECHNOLOGIES. SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER'S SOLE AND EXCLUSIVE REMEDIES. AGILENT
TECHNOLOGIES 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 contracts, product
maintenance agreements and customer assistance agreements are also available. Contact your nearest Agilent
Technologies Sales and Service office for further information on Agilent Technologies' full line of Support Programs.
2
SAFETY SUMMARY
The following general safety precautions must be observed during all phases of operation, service and repair of this
instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument. Agilent Technologies Inc. assumes no liability for the
customer's failure to comply with these requirements.
BEFORE APPLYING POWER.
Verify that the product is set to match the available line voltage and the correct fuse is installed.
GROUND THE INSTRUMENT.
This product is a Safety Class 1 instrument (provided with a protective earth terminal). To minimize shock hazard, the instrument chassis
and cabinet must be connected to an electrical ground. The instrument must be connected to the ac power supply mains through a threeconductor power cable, with the third wire firmly connected to an electrical ground (safety ground) at the power outlet. For instruments
designed to be hard wired to the ac power lines (supply mains), connect the protective earth terminal to a protective conductor before any
other connection is made. Any interruption of the protective (grounding) conductor or disconnection of the protective earth terminal will
cause a potential shock hazard that could result in personal injury. If the instrument is to be energized via an external autotransformer for
voltage reduction, be certain that the autotransformer common terminal is connected to the neutral (earth pole) of the ac power lines
(supply mains).
INPUT POWER MUST BE SWITCH CONNECTED.
For instruments without a built-in line switch, the input power lines must contain a switch or another adequate means for disconnecting
the instrument from the ac power lines (supply mains).
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE.
Do not operate the instrument in the presence of flammable gases or fumes.
KEEP AWAY FROM LIVE CIRCUITS.
Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be made by qualified
service personnel. Do not replace components with power cable connected. Under certain conditions, dangerous voltages may exist even
with the power cable removed. To avoid injuries, always disconnect power, discharge circuits and remove external voltage sources before
touching components.
DO NOT SERVICE OR ADJUST ALONE.
Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present.
DO NOT EXCEED INPUT RATINGS.
This instrument may be equipped with a line filter to reduce electromagnetic interference and must be connected to a properly grounded
receptacle to minimize electric shock hazard. Operation at the line voltage or frequencies in excess of those stated on the data plate may
cause leakage currents in excess of 5.0mA peak.
SAFETY SYMBOLS.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT.
Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the
instrument. Return the instrument to an Agilent Technologies Sales and Service Office for service and repair to ensure that safety features
are maintained.
Instruments which appear damaged or defective should be made inoperative and secured against unintended operation until they can be
repaired by qualified service personnel.
Instruction manual symbol: the product will be marked with this symbol when it is necessary for the user to refer to the
instruction manual (refer to Table of Contents) .
Indicates hazardous voltages.
Indicate earth (ground) terminal.
The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like, which, if not correctly
performed or adhered to, could result in personal injury. Do not proceed beyond a WARNING sign until the
indicated conditions are fully understood and met.
The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like, which, if not correctly
performed or adhered to, could result in damage to or destruction of part or all of the product. Do not proceed beyond
a CAUTION sign until the indicated conditions are fully understood and met.
3
Safety Symbol Definitions
Symbol Description Symbol Description
Direct current Terminal for Line conductor on permanently
installed equipment
Alternating current Caution, risk of electric shock
Both direct and alternating current Caution, hot surface
Three-phase alternating current Caution (refer to accompanying documents)
Earth (ground) terminal In position of a bi-stable push control
Protective earth (ground) terminal
(Intended for connection to external
protective conductor.)
Frame or chassis terminal On (supply)
Terminal for Neutral conductor on
permanently installed equipment
Terminal is at earth potential
(Used for measurement and control
circuits designed to be operated with
one terminal at earth potential.)
Printing History
The edition and current revision of this manual are indicated below. Reprints of this manual containing minor corrections
and updates may have the same printing date. Revised editions are identified by a new printing date. A revised edition
incorporates all new or corrected material since the previous printing date. Changes to the manual occurring between
revisions are covered by change sheets shipped with the manual. Also, if the serial number prefix of your power supply is
higher than those listed on the title page of this manual, then it may or may not include a change sheet. That is because even
though the higher serial number prefix indicates a design change, the change may not affect the content of the manual.
Out position of a bi-stable push control
Off (supply)
Standby (supply)
Units with this symbol are not completely
disconnected from ac mains when this switch is
off. To completely disconnect the unit from ac
mains, either disconnect the power cord or have
a qualified electrician install an external switch.
Edition 1 June, 1991
Edition2 September, 2000
© Copyright 1991, 2000 Agilent Technologies, Inc.
This document contains proprietary information protected by copyright. All rights are reserved. No part of this document
may be photocopied, reproduced, or translated into another language without the prior consent of Agilent Technologies, Inc.
The information contained in this document is subject to change without notice.
4
TABLE OF CONTENTS
Introduction ............................................................................................................................................................................ 9
Scope .................................................................................................................................................................................... 9
Calibration and Verification ............................................................................................................................................. 9
Troubleshooting................................................................................................................................................................ 9
Principles of Operation ..................................................................................................................................................... 9
Replaceable Parts.............................................................................................................................................................. 9
Circuit Diagrams............................................................................................................................................................... 9
Safety Considerations ........................................................................................................................................................... 9
Manual Revisions................................................................................................................................................................ 10
Firmware Revisions ............................................................................................................................................................ 10
Calibration and Verification................................................................................................................................................ 11
Introduction......................................................................................................................................................................... 11
Test Equipment Required ................................................................................................................................................... 11
Operation Verification Tests............................................................................................................................................... 11
Calibration Procedure ......................................................................................................................................................... 11
Initial Setup..................................................................................................................................................................... 14
Voltage Monitor Zero Calibration .................................................................................................................................. 15
Common Mode Calibration ............................................................................................................................................ 15
Remote Readback Zero Calibration................................................................................................................................ 15
Constant Voltage Full Scale Calibration......................................................................................................................... 17
Voltage Monitor and Remote Readback Full Scale Calibration ..................................................................................... 17
Constant Voltage Zero Calibration ................................................................................................................................. 18
Current Monitor Zero Calibration................................................................................................................................... 18
Constant Current Zero Calibration.................................................................................................................................. 18
Current Monitor Full Scale Calibration .......................................................................................................................... 19
Constant Current Full Scale Calibration .........................................................................................................................19
Power Limit Calibration.................................................................................................................................................. 20
Resistance Programming Full Scale Calibration............................................................................................................. 21
Performance Tests............................................................................................................................................................... 21
Measurement Techniques ............................................................................................................................................... 21
Constant Voltage (CV) Tests.......................................................................................................................................... 22
Constant Current (CC) Tests........................................................................................................................................... 28
Initialization Procedure....................................................................................................................................................... 31
Troubleshooting .................................................................................................................................................................... 33
Introduction......................................................................................................................................................................... 33
Initial Troubleshooting Procedures..................................................................................................................................... 33
Electrostatic Protection....................................................................................................................................................... 34
Repair and Replacement ..................................................................................................................................................... 34
A2 Control Board Removal............................................................................................................................................ 35
A4 FET Board Removal ................................................................................................................................................. 35
A5 Diode Board Removal............................................................................................................................................... 36
A8 GPIB Board Removal ............................................................................................................................................... 36
A3 Front-Panel Board Removal...................................................................................................................................... 36
A1 Main Board Removal................................................................................................................................................ 36
Overall Troubleshooting Procedure.................................................................................................................................... 37
GPIB Section Troubleshooting........................................................................................................................................... 39
Primary Interface Troubleshooting ..................................................................................................................................... 40
5
Secondary Interface Troubleshooting................................................................................................................................. 41
Voltage and Current DAC............................................................................................................................................... 41
Readback DAC Circuits.................................................................................................................................................. 43
Readback Multiplexer (U20): ......................................................................................................................................... 43
Signature Analysis ..............................................................................................................................................................45
Primary SA ..................................................................................................................................................................... 45
Front Panel SA................................................................................................................................................................ 45
Secondary SA .................................................................................................................................................................46
Power Section Troubleshooting.......................................................................................................................................... 51
Main Troubleshooting Setup........................................................................................................................................... 52
Troubleshooting No-Output Failures .............................................................................................................................. 53
Power Section Blocks ..................................................................................................................................................... 54
Troubleshooting AC-Turn-On Circuits........................................................................................................................... 57
Troubleshooting DC-To-DC Converter .......................................................................................................................... 57
Troubleshooting Bias Supplies ....................................................................................................................................... 58
Troubleshooting Down Programmer............................................................................................................................... 61
Troubleshooting CV Circuit ........................................................................................................................................... 61
Troubleshooting CC Circuit............................................................................................................................................ 62
Troubleshooting OVP Circuit......................................................................................................................................... 62
Troubleshooting PWM & Clock..................................................................................................................................... 63
Principles of Operation ........................................................................................................................................................65
Introduction......................................................................................................................................................................... 65
GPIB Board ........................................................................................................................................................................65
Primary Microprocessor .................................................................................................................................................65
Address Switches........................................................................................................................................................... 65
EEPROM ........................................................................................................................................................................ 67
Isolation .......................................................................................................................................................................... 67
Secondary Microprocessor .............................................................................................................................................67
Digital-to-Analog Converters.......................................................................................................................................... 67
Analog Multiplexer......................................................................................................................................................... 67
Status Inputs.................................................................................................................................................................... 67
Front Panel Board............................................................................................................................................................... 68
Address Latches and Decoders....................................................................................................................................... 68
Volts and Amps Output Ports and Displays.................................................................................................................... 68
RPG and Latches ............................................................................................................................................................68
Front-Panel Switches and Input Port............................................................................................................................... 68
Mode Indicators.............................................................................................................................................................. 70
OVP Adjust Control........................................................................................................................................................ 70
Power Clear ....................................................................................................................................................................70
Power Mesh and Control Board.......................................................................................................................................... 70
Overview......................................................................................................................................................................... 70
Power Mesh .................................................................................................................................................................... 71
Control Board ................................................................................................................................................................. 73
Replaceable Parts.................................................................................................................................................................. 79
Introduction......................................................................................................................................................................... 79
Ordering Information.......................................................................................................................................................... 80
Component Location and Circuit Diagrams .................................................................................................................... 101
6
l00 Vac Input Power Option 100 .......................................................................................................................................119
General Information.......................................................................................................................................................... 119
Description.................................................................................................................................................................... 119
Scope of Appendix A.................................................................................................................................................... 119
Suggestions for Using Appendix A............................................................................................................................... 119
Chapter 1 Manual Changes ........................................................................................................................................... 119
Chapter 2 Manual Changes ........................................................................................................................................... 119
Chapter 3 Manual Changes:.......................................................................................................................................... 123
Chapter 4 Manual Changes:.......................................................................................................................................... 123
Chapter 5 and 6 Manual Changes ................................................................................................................................. 123
Blank Front Panel Option 001........................................................................................................................................... 125
Introduction....................................................................................................................................................................... 125
Troubleshooting............................................................................................................................................................ 125
Chapter 2 Manual Changes:.......................................................................................................................................... 125
Chapter 3 Manual Changes:.......................................................................................................................................... 126
Chapter 5 and 6 Manual Changes: ................................................................................................................................ 126
7
1
Introduction
Scope
This manual contains information for troubleshooting the Agilent 6030A, 6031A, 6032A, or 6035A 1000 W Autoranging
Power Supply to the component level. Wherever applicable, the service instructions given in this manual refer to pertinent
information provided in the Operation Manual (P/N 5959-3301). Both manuals cover Agilent Models
6030A/31A/32A/35A; differences between models are described as required.
The following information is contained in this manual.
Calibration and Verification
Contains calibration procedures for Agilent Models 6030A/31A/32A/35A. Also contains verification procedures that check
the operation of the supplies to ensure they meet the specifications of Chapter 1 in the Operating Manual.
Troubleshooting
Contains troubleshooting procedures to isolate a malfunction to a defective component on the main circuit board or to a
defective assembly (front panel, power transformer, or cable assembly). Board and assembly level removal and replacement
procedures are also given in this section.
Principles of Operation
Provides block diagram level descriptions of the supply's circuits. The primary interface, secondary interface, and the power
mesh and control circuits are described. These descriptions are intended as an aid in troubleshooting.
Replaceable Parts
Provides a listing of replaceable parts for all electronic components and mechanical assemblies for Agilent Models
6030A/31A/32A/35A.
Circuit Diagrams
Contains functional schematics and component location diagrams for all Agilent 6030A/31A/32A/35A circuits. The names
that appear on the functional schematics also appear on the block diagrams in Chapter 2. Thus, the descriptions in Chapter 2
can be correlated with both the block diagrams and the schematics.
Safety Considerations
This product is a Safety Class 1 instrument, which means that it is provided with a protective earth terminal. Refer to the
Safety Summary page at the beginning of this manual for a summary of general safety information. Safety information for
specific procedures is located at appropriate places in the manual.
9
Manual Revisions
Agilent Technologies instruments are identified by a 10-digit serial number. The format is described as follows: first two
letters indicate the country of manufacture. The next four digits are a code that identify either the date of manufacture or of a
significant design change. The last four digits are a sequential number assigned to each instrument.
Item Description
US The first two letters indicates the country of manufacture, where US = USA.
3648 This is a code that identifies either the date of manufacture or the date of a significant design change.
0101 The last four digits are a unique number assigned to each power supply.
If the serial number prefix on your unit differs from that shown on the title page of this manual, a yellow Manual Change
sheet may be supplied with the manual. It defines the differences between your unit and the unit described in this manual.
The yellow change sheet may also contain information for correcting errors in the manual.
Note that because not all changes to the product require changes to the manual, there may be no update information required
for your version of the supply.
Older serial number formats used with these instruments had a two-part serial number, i.e. 2701A-00101. This manual also
applies to instruments with these older serial number formats. Refer to Appendix G for backdating information.
Firmware Revisions
The primary and secondary interface microcomputer chips inside of your supply are identified with labels that specify the
revision of the supply's firmware. This manual applies to firmware revisions A.00.00, A.00.01, and A.00.02.
10
2
Calibration and Verification
Introduction
This section provides test and calibration procedures. The operation-verification tests comprise a short procedure to verify
that the unit is performing properly, without testing all specified parameters. After troubleshooting and repair of a defective
power supply you can usually verify proper operation with the turn-on checkout procedure in the Operating Manual. Repairs
to the A1 main board, the A2 control board and the A8 GPIB board can involve circuits which, although functional, may
prevent the unit from performing within specified limits. So, after A1, A2 or A8 board repair, decide if recalibration and
operation verification tests are needed according to the faults you discover. Use the calibration procedure both to check
repairs and for regular maintenance.
When verifying the performance of this instrument as described in this chapter, check only those specifications for which a
performance test procedure is included.
Test Equipment Required
Table 2-1 lists the equipment required to perform the tests of this section. You can separately identify the equipment for
performance tests, calibration and troubleshooting using the USE column of the table.
Operation Verification Tests
To assure that the unit is performing properly, without testing all specified parameters, first perform the turn-on checkout
procedure in the Operating Manual. Then perform the following performance tests, in this section.
Voltage Programming And Readback Accuracy
Current Programming And Readback Accuracy
CV Load Effect
CC Load Effect
Calibration Procedure
Calibrate the unit twice per year and when required during repair. The following calibration procedures should be
performed in the sequence given.
Note: Some of the calibration procedures for this instrument can be performed independently, and some
procedures must be performed together and/or in a prescribed order. If a procedure contains no references
to other procedures, you may assume that it can be performed independently.
To return a serviced unit to specifications as quickly as possible with minimal calibration, the technician
need only perform calibration procedures that affect the repaired circuit. Table 2-2 lists various power
supply circuits with calibration procedures that should be performed after those circuits are serviced.
If the GPIB board (A8) has been replaced, you must first initialize the board before you can calibrate the
unit. Refer to Page 31.
11
Table 2-1. Test Equipment Required
TYPE REQUIRED CHARACTERISTICS USE RECOMMENDED MODEL
Oscilloscope Sensitivity: 1 mV
P,T Agilent 54504A
Bandwidth: 20MHz & 100MHz
Input: differential, 50 Ω & 10MΩ
RMS Voltmeter True rms, 10MHz bandwidth
P Agilent 3400B
Sensitivity: 1 mV Accuracy: 5%
Logic Pulser 4.5 to 5.5Vdc @ 35mA T Agilent 546A
Multimeter Resolution: 100nV
P,C,T Agilent 3458A
Accuracy: 0.0035%, 6½ digit
Signature Analyzer -- T Agilent 5004A
GPIB Controller Full GPIB capabilities C,T,P HP Series, 200/300
Current Probe No saturation at 100A
Bandwidth: 20Hz to 15MHz
P Tek P6303 Probe
AM503 Amp
TM500 Power Module
Electronic Load 6030A 200 V/5 A P,C 6050A & 60503A (4)
60 V/17A 6050A & 60503A (4)
6031A 20 V/50 A 6050A & 60504A (2)
7 V/120 A 6050A & 60504A (2)
6032A 60 V/17.5 A 6050A & 60504A (2)
20 V/50 A 6050A & 60504A (2)
Current Shunt
Power Resistors*
6035A 500 V/2 A
200 V/5 A
0.1Ω/0.04%/15A/25W
0.01Ω/0.04%/100A/100W
0.001Ω/0.04%/300A/100W
6030A 3.5Ω/40Ω 1% 1000 W (min.)
P,C Guildline 9230/15
P,C
Power Resistor 250Ω 1% 1KW
6050A & 60503A (4)
Guildline 9230/100
Guildline 9230/300
6031A 0.069Ω/0.04Ω 1% 1000W (min.)
6032A 0.4Ω/3.5Ω 1% 1000W (min.)
6035A 40Ω/250Ω 1% 1000W (min.)
Calibration and Test
Resistors
Value: 100Ω, 5%, 1W
1Ω, 5%, ½W
C,T
1KΩ, 5%, ¼W
2KΩ, 0.01%, ¼W
Terminating
Value: 50Ω ±5%, noninductive
P
Resistors (2)
Blocking
Value: 0.01µF, 100Vdc
P
Capacitors (2)
Variable Voltage
Transformer
Adjustable from -13% to +6% of input
voltage range, 4KVA minimum
P,C
(autotransformer)
Isolation Transformer 4KVA minimum T
Common-mode
Toroidal Core
≥3.7µH/turn
≅23mm I.D.
2
P Ferrox-Cube
500T600-3C8,
Agilent 9170-0061
DC Power Supply Voltage range: 0-60Vdc
C,T Agilent 6024A
Current range: 0-3Adc
P = performance testing C = calibration adjustments T = troubleshooting
* Not required if using electronic load.
** Less accurate, and less expensive, current-monitor resistors can be used, but the accuracy to which current programming
and readback can be checked must be reduced accordingly.
12
Table 2-2. Guide to Recalibration After Repair
Printed Circuit
Board
A1 Main Board R3 Current Monitor Full Scale Calibration
A1 Main Board T1, T2 Power Limit Calibration
A5 Diode Board CR4 Power Limit Calibration
A2 Control Board Constant Voltage Circuit All Voltage Monitor Zero Calibration
(All Except Current Source) Common Mode Calibration
A2 Control Board Constant Voltage Circuit All Resistance Programming Full Scale Calibration
(Current Source)
A2 Control Board Constant Current Circuit All Current Monitor Zero Calibration
Block Name Ref.
Desig.
Perform These Procedures
Constant Current Full Scale Calibration
Remote Readback Zero Calibration
Constant Voltage Full Scale Calibration
Voltage Monitor and Remote Readback Full
Scale Calibration
Constant Voltage Zero Calibration
Constant Current Zero Calibration
Current Monitor Full Scale Calibration
Constant Current Full Scale Calibration
A2 Control Board Power Limit Comparator All Power Limit Calibration
A2 Control Board Bias Power Supplies All All Calibration procedures
( + & -15V Supplies)
A8 GPIB Board Voltage Monitor Buffer All Voltage Monitor Zero Calibration
Remote Readback Zero Calibration
Constant Voltage Full Scale Calibration
Voltage Monitor and Remote Readback Full
Scale Calibration
Constant Voltage Zero Calibration
A8 GPIB Board Analog Multiplexer All Remote Readback Zero Calibration
Constant Voltage Full Scale Calibration
Voltage Monitor and Remote Readback Full
Scale Calibration
Constant Voltage Zero Calibration
A8 GPIB Board Readback DAC All Remote Readback Zero Calibration
Constant Voltage Full Scale Calibration
Voltage Monitor and Remote Readback Full
Scale Calibration
Constant Voltage Zero Calibration
13
Table 2-2. Guide to Recalibration After Repair (continued)
Printed Circuit
Board
A8 GPIB Board Voltage DAC All Remote Readback Zero Calibration
A8 GPIB Board Current DAC All Constant Current Zero Calibration
A8 GPIB Board U5 Remote Readback Zero Calibration
Block Name Ref.
Desig.
Perform These Procedures
Constant Voltage Full Scale Calibration
Voltage Monitor and Remote Readback Full
Scale Calibration
Constant Voltage Zero Calibration
Constant Current Full Scale Calibration
Constant Voltage Full Scale Calibration
Voltage Monitor and Remote Readback Full
Scale Calibration
Constant Voltage Zero Calibration
Constant Current Full Scale Calibration
Initial Setup
a. Unplug the line cable.
b. Remove the top cover by removing the two top-rear screws. Slide the cover to the rear, and pull up.
c. Plug a control board test connector onto the A2J7 card edge fingers.
d. Turn OVERVOLTAGE ADJUST control A3R72 fully clockwise.
e. Disconnect all loads from output terminals.
f. Connect power supply for local sensing, and ensure that MODE switches are set as shown below.
g. Connect a GPIB controller to the power supply.
h. Reconnect line cable and turn on ac power.
i. Allow unit to warm up for 30 minutes with the internal cover on. The cover should remain in place during all
calibrations.
j. When attaching the DVM, the minus lead of the DVM should be connected to the first node listed, and the plus lead
should be connected to the second node listed.
k. At the beginning of each calibration procedure, the power supply should be in its power-on state (turn ac power off and
back on), with no external circuitry connected except as instructed.
l. The POWER LIMIT adjustment (A2R25) must be adjusted at least coarsely before many of the calibration procedures
can be performed. If you have no reason to suspect that the Power Limit circuit is out of adjustment, do not change its
setting. Otherwise, center A2R25 before you begin to calibrate the power supply.
m. Turn off ac power when making or removing connections to the power supply.
14
Maintenance described herein is performed with power supplied to the instrument, and protective covers
removed. Such maintenance should be performed only by service trained personnel who are aware of the
hazards involved (for example, fire and electrical shock). Where maintenance can be performed without
power applied, the power should be removed.
Voltage Monitor Zero Calibration
a. Send string "VSET 0; ISET 0; OUT OFF".
b. Short power supply output terminals.
c. Attach the DVM from
d. Adjust A2R22 (V-MON ZERO) to 0V ±20µV. ( ± 40µV 6035A).
M on the rear panel through a 1kΩ resistor to A2J7 pin 3 (V-MON buffered).
Common Mode Calibration
a. Send string ''VSET 0; ISET 0; OUT OFF".
b. Short power supply sense terminals ( + S to - S) at rear panel.
c. Attach the DVM from
d. Take initial reading from DVM.
e. Remove both local sensing straps from rear-panel terminal block, and connect a 1-volt external power supply with its +
lead to - S and its--lead to - Out. See Figure 2-1.
f. Adjust A2R21 (CV LOAD REG) to Initial Reading
±20µV (6030A)
±80µV (6031A)
±20µV (6032A)
±40µV (6035A)
g. Replace local sense straps after removing external power supply.
M on the rear panel through a 1kΩ resistor to A2J7 pin 3 (V-MON buffered).
Note: Common mode calibration is not required for Agilent Model 6035A.
Remote Readback Zero Calibration
Note:
a. Connect an external supply to the power supply as shown in Figure 2-2.
b. Send string "VSET 0; ISET 5; OUT ON''.
c. Attach the DVM from
d. Adjust A8R40 (CV PROG ZERO) to 625µV ± 30µV.
e. Remove the DVM.
f. Enter and run the following program and begin noting the controller's display:
10 OUTPUT 705; "VOUT''
20 ENTER 705; A
30 DISP A
40 GOTO 10
50 END
This procedure and the following three procedures must be done as a set, without omitting any of the four
procedures. Also, the following four procedures require that V-MON ZERO (A2R22) be adjusted within
specifications. If it is not, perform the Voltage Monitor Zero Calibration before proceeding.
M on the rear panel through a 1KΩ resistor to A2J7 pin 3 (V-MON buffered).
15
g. Adjust A8R51 (READBACK ZERO) until the value displayed on the controller toggles between:
0 and 50mV (6030A)
0 and 5mV (6031A)
0 and 15mV (6032A)
0 and 125mV (6035A)
h. After adjusting A8R51 you must continue the calibration procedure through to the completion of Constant Voltage
Zero Calibration. Remember to disconnect the external power supply and resistor.
Figure 2-1. Common Mode Setup
Figure 2-2. Remote Readback Zero And CV Zero Calibration Setup
16
Constant Voltage Full Scale Calibration
Note: Perform this procedure only after completing Remote Readback Zero Calibration.
a. Remove all external test circuits.
b. Send string:
"VSET 200; ISET 5; OUT ON" (6030A)
''VSET 20; ISET 5; OUT ON" (6031A)
"VSET 60; ISET 5; OUT ON" (6032A)
"VSET 500; ISET 5; OUT ON" (6035A)
c. Attach the DVM from - S to + S terminals on rear panel.
d. Adjust A8R58 (CV PROG F.S.) to:
200.025 ±6mV (6030A)
20.0025 ±0.6mV (6031A)
60.0075 ±1.82mV (6032A)
500.063 ±6mV (6035A)
e. After adjusting A8R58 you must continue the calibration procedure through to the completion of Constant Voltage
Zero Calibration.
Voltage Monitor and Remote Readback Full Scale Calibration
Note: Perform this procedure only after completing Constant Voltage Full Scale Calibration.
a. Attach the DVM from M on the rear panel to A2J7 pin 3 (V-MON buffered). See DVM connection in Figure 2-1.
b. Send string: ''VSET 200; ISET 5; OUT ON'' (6030A)
''VSET 20; ISET 5; OUT ON'' (6031A)
''VSET 60; ISET 5; OUT ON'' (6032A)
''VSET 500; ISET 5; OUT ON" (6035A)
c. Adjust A8R75 (V-MON F.S.) to 5.000625V ±100µV.
d. Disconnect the DVM.
e. Enter and run the following program and begin noting the controller's display.
10 OUTPUT 705; ''VOUT?''
20 ENTER 705; A
30 DISP A
40 GOTO 10
50 END
f. Adjust A8R61 (READBACK F.S.) until the value displayed on the controller toggles between:
200.000 and 200.050 Vdc (6030A)
20.000 and 20.005 Vdc (6031A)
60.000 and 60.015 Vdc (6032A)
500.000 and 500.125 Vdc (6035A)
g. After adjusting A8R61 you must continue the calibration procedure through to the completion of Constant Voltage
Zero Calibration.
17
Constant Voltage Zero Calibration
Note: Perform this procedure only after completing Voltage Monitor and Remote Readback Full Scale
Calibration.
a. Send string "VSET 0; ISET 5; OUT ON".
b. Connect an external supply to the power supply as shown in Figure 2-2.
c. Attach the DVM from - S to + S on the rear panel.
d. Adjust A8R40 (CV PROG ZERO) to 0 ±120µV.
Current Monitor Zero Calibration
a. Send string "VSET 0; ISET 0; OUT OFF''.
b. Connect a short across power supply output terminals.
c. Attach the DVM from
d. Allow several minutes (3 or more) to ensure thermal settling.
e. Adjust A2R8 (I-MON ZERO) to 0 ±100 µV.
M to IM on the rear panel.
Constant Current Zero Calibration
a. Connect the test setup shown in Figure 2-3.
b. Send string ''VSET 5; ISET 0; OUT ON''.
c. Allow several minutes (3 or more) to ensure thermal settling.
d. Adjust A8R29 (CC PROG ZERO) to:
0V ±0.6mV (6030A, 6035A)
0V ±8.0mV (6031A)
0V ±1.7mV (6032A)
18
Figure 2-3. CC Zero Calibration Setup
Current Monitor Full Scale Calibration
Note: This procedure requires that I-MON ZERO (A2R8) be adjusted within specifications. If it is not, perform
the Current Monitor Zero Calibration before proceeding.
a. Connect Rm current-monitoring shunt:
(1milliohm, 6031A)
(10 milliohm, 6030A, 6032A)
(100 milliohm, 6035A)
0.05% or better across power supply output terminals.
b. Send string:
"VSET 5; ISET 17; OUT ON" (6030A)
"VSET 5; ISET 120; OUT ON" (6031A)
"VSET 5; ISET 50; OUT ON" (6032A)
"VSET 5; ISET 5; OUT ON" (6035A)
c. Attach DVM from
d. Take initial reading from DVM.
e. Attach DVM across Rm. Allow several minutes (3 or more) to ensure thermal settling. This can be noted as a stable
reading on the DVM.
f. Adjust A2R9 (I-MON F.S.) to:
0.034 * initial reading ±33.5µV (6030A)
0.024 * initial reading ±80.0µV (6031A)
0.100 * initial reading ±0.4mV (6032A)
0.100 * initial reading ±67.0µV (6035A)
M to IM on the rear panel. Use six-digit display on Agilent 3458A DVM.
Constant Current Full Scale Calibration
Note: This procedure requires that CC PROG ZERO (A8R29) and I-MON F. S. (A2R9) be adjusted within
specifications. If they are not, perform Constant Current Zero and/or Current Monitor Full Scale
Calibration before proceeding.
a. Connect Rm current-monitoring shunt:
( 1 milliohm, 6031A)
( 10 milliohm, 6030A, 6032A)
(100 milliohm, 6035A)
0.05% or better across power supply output terminals.
b. Send string:
"VSET 5; ISET 17; OUT ON" (6030A)
"VSET 5, ISET 120; OUT ON'' (6031A)
"VSET 5, ISET 50; OUT ON" (6032A)
''VSET 5; ISET 5; OUT ON" (6035A)
c. Attach DVM across Rm. Allow several minutes (3 or more) to ensure thermal settling.
d. Adjust A8R55 (CC PROG F.S.) to:
1.70V ±0.1mV (6030A)
0.12V ±3.0µV (6031A)
0.50V ±30µV (6032A)
0.50V ±40µV (6035A)
19
Power Limit Calibration
Note: This procedure requires that CC PROG F. S. (A8R55) be adjusted within specifications. If it is not,
perform Constant Current Full Scale Calibration before proceeding.
a. Connect the power supply to the ac power line through a variable autotransformer. Connect a DVM across the input
power rails, with the + lead to the rear of A1R3 and the - lead to the rear of A1R1. Adjust the autotransformer for
240Vdc on the input power rail. The input power rail must be maintained at 240Vdc during calibration.
The top inside cover must be removed to connect the DVM. Disconnect the ac mains power cord before
connecting or disconnecting the DVM.
a. Connect a electronic load across the output terminals, or use a:
3.8 ohm 1500W resistor (6030A)
0.066 ohm 1500W resistor (6031A)
0.44 ohm 1500 W resistor (6032A)
39 ohm 1500 W resistor (6035A)
b. Set the electronic load for:
17 amperes (6030A)
120 amperes (6031A)
51 amperes (6032A)
5 amperes (6035A)
in the constant Current mode.
c. Turn A2R25 (LOWER KNEE) fully counterclockwise.
d. Turn on power supply and send string:
"VSET 65; ISET 17.4; OUT ON" (6030A)
''VSET 8; ISET 121; OUT ON'' (6031A)
"VSET 22; ISET 51; OUT ON" (6032A)
''VSET 200; ISET 5.1; OUT ON'' (6035A)
e. Adjust A2R25 (LOWER KNEE) clockwise until CV LED on front panel turns on. Power supply output should be:
65 ±0.2V @17A in CV mode (6030A)
8 ±0.08V @120A in CV mode (6031A)
22 ±0.2V @50A in CV mode (6032A)
200 ±0.5V @5A in CV mode (6035A)
f. Turn off power supply. Reset the electronic load for:
5.25A in CC mode (6030A)
51A in CC mode (6031A)
18.2A in CC mode (6031A)
2.2A in CC mode (6035A)
or change the resistor to:
38ohm 1500W (6033A)
0.4ohm 1500W (6031A)
3.3ohm 1500W(6032A)
227ohm 1500W(6035A)
g. Turn A2R26 (UPPER KNEE) fully counterclockwise.
h. Turn on power supply. Send string
"VSET 200; ISET 5.5; OUT ON" (6030A)
"VSET 20.5; ISET 55; OUT ON" (6031A)
"VSET 60; ISET 19; OUT ON" (6032A)
"VSET 500; ISET 2.2; OUT ON" (6035A)
20
i. Adjust A2R26 (UPPER KNEE) clockwise until front panel CV LED turns on. Power supply output should be:
200 ±0.4V @5.25A in CV mode (6030A)
20.5 ±0.5V @55A in CV mode (6031A)
60 ±0.4V @18.2A in CV mode (6032A)
500 ±0.4V @2.2A in CV mode (6035A)
Resistance Programming Full Scale Calibration
a. Send string ''OUT OFF".
b. Connect a 2K ohm calibration resistor from
c. Set rear-panel MODE switches for resistance programming:
d. Attach the DVM from
e. Adjust A2R23 (R-PROG F.S.) to 2.5V ±4mV.
f. Remember to reset MODE switches to original settings.
P to VP on the rear panel.
P to VP on rear panel.
Performance Tests
The following paragraphs provide test procedures for verifying the unit's compliance with the specifications of Table 1-1 in
the Operating Manual. Please refer to CALIBRATION PROCEDURE or TROUBLESHOOTING if you observe
out-of-specification performance. The performance test specifications are listed in the Performance Test Record in
Appendix C through F. You can record the actual measured values in the columns provided.
Measurement Techniques
Setup For All Tests. Measure the output voltage directly at the + S and - S terminals. Connect unit for local sensing, and
ensure that MODE switches are set as shown below. Select an adequate wire gauge for load leads using the procedures
given in the Operating Manual for connecting the load.
Electronic Load. The test and calibration procedures use an electronic load to test the unit quickly and accurately. If an
electronic load is not available, you may substitute:
40Ω 1000W load resistor (6030A)
0.4Ω 1000W load resistor (6031A)
3.5Ω 1000W load resistor (6032A)
250Ω 1000W load resistor (6035A)
for the electronic load in these tests:
CV Source Effect (Line Regulation)
CC Load Effect (Load Regulation)
21
You may substitute:
3.5Ω 1000W load resistor (6030A)
0.069Ω 1000W load resistor (6031A)
0.4Ω 1000W load resistor (6032A)
40Ω 1000W load resistor (6035A)
in these tests:
CV Load Effect (Load Regulation)
CV PARD (Ripple and Noise)
CC Source Effect (Line Regulation)
CC PARD (Ripple and Noise)
The substitution of the load resistor requires adding a load switch and making minor changes to the procedures. The load
transient recovery time test procedure is not amenable to modification for use with load resistors.
An electronic load is considerably easier to use than a load resistor. It eliminates the need for connecting resistors or
rheostats in parallel to handle the power, it is much more stable than a 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.
Current-Monitoring Resistor. To eliminate output current measurement error caused by voltage drops in the leads and
connections, connect the current-monitoring resistor between -OUT and the load as a four-terminal device. Figure 2-4
shows correct connections. Connect the current-monitoring test leads inside the load-lead connections directly at the
monitoring resistor element.
Note: A current-monitoring resistor with 1% accuracy is suitable for all tests except current programming
accuracy and current readback accuracy. For these tests, use the shunt listed in Table 2-1.
Figure 2-4. Current-Monitoring Resistor Setup
GPIB Controller. Most performance tests can be performed using only front-panel controls. However, a GPIB controller is
required to perform the voltage and current programming accuracy tests and the voltage and current readback accuracy tests.
Constant Voltage (CV) Tests
CV Setup. If more than one meter or a meter and an oscilloscope are used, connect each to the + S and - S terminals by a
separate pair of leads to avoid mutual coupling effects. Connect only to + S and -S because the unit regulates the output
voltage between + S and - S, not between + OUT and -OUT. Use coaxial cable or shielded 2-wire cable to avoid pickup on
test leads. For all CV tests set the output current at full output to assure CV operation.
Voltage Programming And Readback Accuracy. This procedure verifies that the voltage programming and readback
functions are within specifications. A GPIB controller must be used for this test.
a. Connect digital voltmeter between + S and - S.
b. Turn on ac power to the power supply.
c. Send string:
"VSET 0.5; ISET 17" (6030A)
22
''VSET 0.1; ISET 120'' (6031A)
''VSET 0.09; ISET 50" (6032A)
''VSET 1.0; ISET 5'' (6035A)
d. The DVM reading should be in the range:
0.354 to 0.645Vdc (6030A)
0.085 to 0.115Vdc (6031A)
0.050 to 0.130Vdc (6032A)
0.598 to 1.400Vdc (6035A)
Note the reading.
e. Enter and run the following program:
10 OUTPUT 705; "VOUT?"
20 ENTER 705;A
30 DISP A
40 GOTO 10
50 END
f. The value displayed by the controller should be the value noted in step d:
± 0.080Vdc (6030A)
± 0.007Vdc (6031A)
± 0.020 Vdc (6032A)
± 0.205 Vdc (6035A)
g. Send string:
"VSET 200; ISET 17" (6030A)
''VSET 20; ISET 120'' (6031A)
''VSET 60; ISET 50" (6032A)
''VSET 500; ISET 5" (6035A)
h. The DVM reading should be in the range:
199.785 to 200.215Vdc (6030A)
19.978 to 20.022Vdc (6031A)
59.939 to 60.061 Vdc (6032A)
498.350 to 501.650 Vdc (6035A)
Note the reading.
i. Run the program listed in step e. The value displayed by the controller should be the value noted in step h:
± 0.240Vdc (6030A)
± 0.023 Vdc (6031A)
± 0.068 Vdc (6032A)
± 2.700 Vdc (6035A)
Load Effect (Load Regulation). Constant-voltage load effect is the change in dc output voltage (Eo) resulting from a
load-resistance change from open-circuit to full-load. Full-load is the resistance which draws the maximum rated output
current at voltage Eo. Proceed as follows:
a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set
resistance to maximum.
b. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up current setting to full output.
c. Turn up output voltage to:
60Vdc (6030A)
7.0Vdc (6031A)
20.0Vdc (6032A)
200Vdc (6035A)
as read on the digital voltmeter.
23
Figure 2-5. Basic Test Setup
d. Reduce the resistance of the load to draw an output current of:
17.0Adc (6030A)
120Adc (6031A)
50 Adc (6032A)
5.0 Adc (6035A)
Check that the unit's CV LED remains lighted.
e. Open-circuit the load.
f. Record the output voltage at the digital voltmeter.
g. Reconnect the load.
h. When the reading settles, record the output voltage again. Check that the two recorded readings differ no more than:
± 0.011Vdc (6030A)
± 0.0037Vdc (6031A)
± 0.007 Vdc (6032A)
± 0.033 Vdc (6035A)
Source Effect (Line Regulation). Source effect is the change in dc output voltage resulting from a change in ac input
voltage from the minimum to the maximum value as specified in Input Power Requirements in the Specifications Table, in
the Operating Manual. Proceed as follows:
a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set
resistance to maximum.
b. Connect the unit to the ac power line through a variable autotransformer which is set for nominal line voltage.
c. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up current setting to full output.
d. Turn up output voltage to:
200Vdc (6030A)
20.0Vdc (6031A)
60.0Vdc (6032A)
500Vdc (6035A)
as read on the digital voltmeter.
24
e. Reduce the resistance of the load to draw an output current of:
5.0Adc (6030A)
50 Adc (6031A)
16.5 Adc (6032A)
2.0 Adc (6035A)
Check that the unit's CV LED remains lighted.
f. Adjust autotransformer to the minimum for your line voltage.
g. Record the output voltage at the digital voltmeter.
h. Adjust autotransformer to the maximum for your line voltage.
i. When the reading settles record the output voltage again. Check that the two recorded readings differ no more than:
± 0.011Vdc (6030A)
± 0.004Vdc (6031A)
± 0.009Vdc (6032A)
± 0.063Vdc (6035A)
PARD (Ripple And Noise). Periodic and random deviations (PARD) in the unit's output-ripple and noise-combine to
produce a residual ac voltage superimposed on the dc output voltage. Constant-voltage PARD is specified as the
root-mean-square (rms) or peak-to-peak (pp) output voltage in a frequency range of 20 Hz to 20 MHz.
RMS Measurement Procedure. Figure 2-6 shows the interconnections of equipment to measure PARD in Vrms. To ensure
that there is no voltage difference between the voltmeter's case and the unit's case, connect both to the same ac power outlet
or check that the two ac power outlets used have the same earth-ground connection.
Use the common-mode choke as shown to reduce ground-loop currents from interfering with measurement. Reduce noise
pickup on the test leads by using 50Ω coaxial cable, and wind it five turns through the magnetic core to form the
common-mode choke. Proceed as follows:
a. Connect the test equipment as shown in Figure 2-6. Operate the load in constant resistance mode (Amps/Volt) and set
resistance to maximum.
b. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up current setting to full output.
c. Turn up output voltage to:
60Vdc (6030A)
7Vdc (6031A)
20Vdc (6032A)
200Vdc (6035A)
d. Reduce the resistance of the load to draw an output current of:
17.0Adc (6030A)
120Adc (6031A)
50Adc (6032A)
5.0Adc (6035A)
Check that the unit's CV LED remains lighted.
e. Check that the rms noise voltage at the true rms voltmeter is no more than:
22mV rms (6030A)
8 mV rms (6031A)
6 mV rms (6032A)
50 mV rms (6035A)
25
Figure 2-6. RMS Measurement Test Setup, CV PARD Test
Peak Measurement Procedure. Figure 2-7 shows the interconnections of equipment to measure PARD in Vpp. The
equipment grounding and power connection instructions of Paragraph 2-36 apply to this setup also. Connect the
oscilloscope to the + S and - S terminals through 0.01µF blocking capacitors to protect the oscilloscope's input from the
unit's output voltage. To reduce common-mode noise pickup, set up the oscilloscope for a differential, two-channel voltage
measurement. To reduce normal-mode noise pickup, use matched-length, 1 meter or shorter, 50Ω coaxial cables with
shields connected to the oscilloscope case and to each other at the other ends. Proceed as follows:
a. Connect the test equipment as shown in Figure 2-7. Operate the load in constant resistance mode (Amps/Volt) and set
resistance to maximum.
b. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up current setting to full output.
c. Turn up output voltage to:
60Vdc (6030A)
7Vdc (6031A)
20Vdc (6032A)
200 Vdc (6035A)
d. Turn up output current setting to full output and reduce the resistance of the load to draw an output current of:
17.0Adc (6030A)
120Adc (6031A)
50Adc (6032A)
5.0Adc (6035A)
Check that the unit's CV LED remains lighted.
e. Set the oscilloscope's input impedance to 50Ω and bandwidth to 20MHz. Check that the peak-to-peak is no more than:
50mV (6030A/31A)
40mV (6032A)
160mV (6035A)
26
Figure 2-7. Peak-To-Peak Measurement Test Setup, CV PARD Test
Load Transient Recovery Time. Specified for CV operation only; load transient recovery time is the time for the output
voltage to return to within a specified band around its set voltage following a step change in load.
Use the equipment setup of Figure 2-5 to display output voltage transients while switching the load between 10% with the
output set at:
60Vdc (6030A)
7Vdc (6031A)
20Vdc (6032A)
200Vdc (6035A)
Proceed as follows:
a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant-current mode and set for minimum
current.
b. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up current setting to full output.
c. Turn up output voltage to:
60Vdc (6030A)
7Vdc (6031A)
20.0Vdc (6032A)
200Vdc (6035A)
as read on the digital voltmeter.
d. Set the load to vary the load current between:
15.3 and 17Adc (6030A)
108 and 120Adc (6031A)
45 and 50Adc (6032A)
4.5 and 5.0 Adc (6035A)
at a 30Hz rate for the 10% RECOVERY TEST.
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 Figure 2-8.
27
.
g. Check that the amplitude of the transient pulse at 1 ms is no more than:
150mV/2ms (6030A)
100mV/2ms (6031A)
100mV/2ms (6032A)
200mV/5ms (6035A)
Figure 2-8. Load Transient Recovery Waveform
Constant Current (CC) Tests
CC Setup. Constant-current tests are analogous to constant-voltage tests, with the unit's output short circuited and the
voltage set to full output to assure CC operation. Follow the general setup instructions of Pages 21 and 22.
Current Programming And Readback Accuracy. This procedure verifies that the current programming and readback
functions are within specifications. A GPIB controller must be used for this test. The accuracy of the current shunt resistor
(Rm) must be 0.02% or better. Proceed as follows:
a. Connect test setup shown in Figure 2-5, except replace the load with a short circuit.
b. Turn on ac power to the power supply.
c. Send string:
"VSET 200; ISET 0.5" (6030A)
"VSET 20; ISET 0.5" (6031A)
''VSET 60; ISET 0.5" (6032A)
''VSET 500; ISET 0.10" (6035A)
d. Check that the voltage across Rm is in the range:
4.75 to 5.25mV (6030A)
248 to 751µV (6031A)
4.14 to 5.86mV (6032A)
1.5 to 1.85mV (6035A)
Note the reading.
e. Enter and run the following program:
10 OUTPUT 705; "IOUT?''
20 ENTER 705; A
30 DISP A
40 GOTO 10
50 END
f. The value displayed by the controller should be the actual output current:
± 17mA (6030A)
± 102mA (6031A)
± 36mA (6032A)
± 50 mA (6035A)
28
g. Send string:
"VSET 200; ISET 17" (6030A)
''VSET 20; ISET 120" (6031A)
''VSET 60; ISET 50" (6032A)
''VSET 500; ISET 5" (6035A)
h. Check that the voltage across Rm is in the range:
169.72 to 170.28mV (6030A)
119.4 to 120.55mV (6031A)
498.1 to 501.8 mV (6032A)
490 to 510 mV (6035A)
Note the reading.
i. Run the program listed in step e.
j. The value displayed by the controller should be the actual output current:
± 76mA (6030A)
± 580mA (6031A)
± 215mA (6032A)
± 75mA (6035A)
Load Effect (Load Regulation). Constant current load effect is the change in dc output current (Io) resulting from a
load-resistance change from short-circuit to full-load, or full-load to short-circuit. Full-load is the resistance which develops
the maximum rated output voltage at current Io. Proceed as follows:
a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set
resistance to minimum.
b. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up voltage setting to full output.
c. Turn up output current to:
5.0Adc (6030A)
50Adc (6031A)
16.5Adc (6032A)
2.0Adc (6035A)
d. Increase the load resistance until the output voltage at +S and -S decreases to:
200Vdc (6030A).
20Vdc (6031A).
60Vdc (6032A)
500Vdc (6035A)
Check that the CC LED is lighted and AMPS display still reads ≈ current setting.
e. Short-circuit the load and allow the voltage across Rm to stabilize.
f. Record voltage across Rm.
g. Disconnect short across load.
h. When the reading settles (≈ 10s), record the voltage across Rm again. Check that the two recorded readings differ no
more than:
± 10mA (6030A)
± 20mA (6031A)
± 11mA (6032A)
± 34mA (6035A)
Source Effect (Line Regulation). Constant current source effect is the change in dc output current resulting from a change
in ac input voltage from the minimum to the maximum values listed in the Specifications Table in the Operating Manual.
Proceed as follows:
a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set
resistance to minimum.
b. Connect the unit to the ac power line through a variable autotransformer set for nominal line voltage.
c. Switch the unit's power on and turn up output voltage setting to full output.
29
d. Turn up output current to:
17.0Adc (6030A)
120Adc (6031A)
50Adc (6032A)
5.0 Adc (6035A)
e. Increase the load resistance until the output voltage between + S and - S decreases to:
60Vdc (6030A)
7.0Vdc (6031A)
20.0Vdc (6032A)
200 Vdc (6035A)
Check that the CC LED is still on.
f. Adjust autotransformer to the minimum for your line voltage.
g. Record the voltage across Rm.
h. Adjust autotransformer to the maximum for your line voltage.
i. When the reading settles record the voltage across Rm again. Check that the two recorded readings differ no more than:
6mA (6030A)
37mA (6031A)
15mA (6032A)
18 mA (6035A)
PARD Ripple And Noise. Periodic and random deviations (PARD) in the unit's output (ripple and noise) combine to
produce a residual ac current as well as an ac voltage super-imposed on the dc output. The ac voltage is measured as
constant-voltage PARD, Page 23. Constant-current PARD is specified as the root-mean-square (rms) output current in a
frequency range 20Hz to 20MHz with the unit in CC operation. To avoid incorrect measurements, with the unit in CC
operation, caused by the impedance of the electronic load at noise frequencies, use a:
3.5Ω (6030A)
0.069Ω (6031A)
0.4Ω (6032A)
40Ω (6035A)
load resistor that is capable of safely dissipating 1000 watts. Proceed as follows:
a. Connect the test equipment as shown in Figure 2-9.
Note: For Agilent 6031A units, use a 30Adc power supply in the test setup to subtract from the 120Adc of the Agilent
603lA unit under test. This will prevent the current probe specified in Table 2-1 from saturating. Make
sure the rms noise of the 30Adc supply is less than 10mA rms.
b. Switch the unit's power on and turn the output voltage all the way up.
c. Turn up output current to:
17.0Adc (6030A)
120Adc (6031A)
50 Adc (6032A)
5.0 Adc (6035A)
Check that the unit's CC LED remains lighted.
d. Check that the rms noise current measured by the current probe and rms voltmeter is no more than:
15mA rms (6030A).
120mA rms (6031A)
25mA rms (6032A)
50 mA rms (6035A)
30
Figure 2-9. CC PARD Test Setup
Initialization Procedure
Follow the procedure if either the GPIB assembly has been replaced, or the EEPROM (U70) has been replaced:
1. Install the GPIB assembly in the unit.
2. Turn the power on and depending on your unit's model number, send string:
"EEINIT 6030"
"EEINIT 6031''
"EEINlT 6032"
or
''EEINIT 6035"
3. Turn the power off, wait 5 seconds, then turn the power back on.
4. If the GPIB assembly has been replaced, calibrate the unit.
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