Agilent Technologies 6654A, 6653A, 6652A, 6680A, 6681A User Manual

OPERATING GUIDE

GPIB DC POWER SUPPLIES Agilent Technologies Models 664xA, 665xA, 667xA, and 668xA

AGILENT Model 6641A: 3217A-00111 and Above *

AGILENT Model 6642A: 3204A-00111 and Above *

AGILENT Model 6643A: 3205A-00111 and Above *

AGILENT Model 6644A: 3213A-00111 and Above *

AGILENT Model 6645A: 3215A-00111 and Above *

AGILENT Model 6651A: 3130A-00171 and Above *

AGILENT Model 6652A: 3201A-00381 and Above *

AGILENT Model 6653A: 3145A-00551 and Above *

AGILENT Model 6654A: 3148A-00391 and Above *

AGILENT Model 6655A: 3152A-00176 and Above *

AGILENT Model 6671A: 3129A-00218 and Above *

AGILENT Model 6672A: 3138A-00101 and Above *

AGILENT Model 6673A: 3138A-00101 and Above *

AGILENT Model 6674A: 3133A-00161 and Above *

AGILENT Model 6675A: 3138A-00101 and Above *

AGILENT Model 6680A: 3302A-00101 and Above *

AGILENT Model 6681A: 3250A-00101 and Above *

AGILENT Model 6682A: 3339A-00101 and Above *

AGILENT Model 6683A: 3339A-00161 and Above *

AGILENT Model 6684A: 3339A-00101 and Above *

* For instruments with higher Serial Numbers, a change page may be included.

S1

Agilent Part No. 5961-2579	Printed in USA: March 1995
Microfiche Part No. 5961-2580	Reprinted: April 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 offices 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 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 (earthed pole) of the ac power lines (supply mains).

FUSES.

Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be used. Do not use repaired fuses or short circuited fuseholders. To do so could cause a shock or fire hazard.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE.

Do not operate the instrument in the presence of flammable gases or fumes.

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 line voltages or frequencies in excess of those stated on the data plate may cause leakage currents in excess of 5.0 mA peak.

SAFETY SYMBOLS.

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.

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 Offices 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.

3

SAFETY SUMMARY (continued)

GENERAL

Any LEDs used in this product are Class 1 LEDs as per IEC 825-l.

ENVIRONMENTAL CONDITIONS

With the exceptions noted, all instruments are intended for indoor use in an installation category II, pollution degree 2 environment. They are designed to operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters. Refer to the specifications tables for the ac mains voltage requirements and ambient operating temperature range.

Exceptions: Agilent Technologies Models 6680A, 6681A, 6682A, 6683A, 6684A, 6814A, and 6834A are intended for use in an installation category III environment.

SAFETY SYMBOL DEFINITIONS

Symbol

Description

Symbol

Description

Direct current

Alternating current

Both direct and alternating current

Three-phase alternating current

Earth (ground) terminal

Protective earth (ground) terminal

Frame or chassis terminal

Terminal 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.)

Terminal for Line conductor on permanently installed equipment

Caution, risk of electric shock

Caution, hot surface

Caution (refer to accompanying documents)

In position of a bi-stable push control

Out position of a bi-stable push control

On (supply)

Off (supply)

Standby (supply)

Units with this symbol are not completely disconnected from ac mains when this switch is off. To completely disconnect the unit from ac mains, either disconnect the power cord or have a qualified electrician install an external switch.

Herstellerbescheinigung

Diese Information steht im Zusammenhang mit den Anforderungen der Maschinenläminformationsverordnung vom 18 Januar 1991.

* Schalldruckpegel Lp <70 dB(A) * Am Arbeitsplatz * Normaler Betrieb * Nach EN 27779 (Typprufung).

Manufacturer’s Declaration

This statement is provided to comply with the requirements of the German Sound Emission Directive, from 18 January 1991.

* Sound Pressure Lp <70 dB(A) *At Operator Position * Normal Operation * According to EN 27779 (Type Test).

4

DECLARATION OF CONFORMITY

according to ISO/IEC Guide 22 and EN 45014

Manufacturer’s Name:	Agilent Technologies Inc.
Manufacturer’s Address:	140 Green Pond Road
	Rockaway, New Jersey 07866
	U.S.A.
declares that the Product
Product Name:	a) Single Output System Power Supply
	b) General Purpose Power Supply
Model Number:	a) Agilent 6641A, 6642A, 6643A, 6644A, 6645A
	b) Agilent 6541A, 6542A, 6543A, 6544A, 6545A
conforms to the following Product Specifications:
Safety:	IEC 348:1978 / HD 401S1: 1981 1
EMC:	CISPR 11:1990 / EN 55011:1991 - Group 1 Class B
	IEC 801-2:1991 / EN 50082-1:1992 - 4 kV CD, 8 kV AD
	IEC 801-3:1984 / EN 50082-1:1992 - 3 V / m

IEC 801-4:1988 / EN 50082-1:1992 - 0.5 kV Signal Lines

1 kV Power Lines

Supplementary Information:

The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking accordingly.

Note 1: The product family was introduced prior to 12/93.

New Jersey	January 1997
Location	Date		Bruce Krueger / Quality Manager

European Contact: Your local Agilent Technologies Sales and Service Office or Agilent Technologies GmbH, Department TRE, Herrenberger Strasse 130, D-71034 Boeblingen (FAX:[phone])

5

DECLARATION OF CONFORMITY

according to ISO/IEC Guide 22 and EN 45014

Manufacturer’s Name:	Agilent Technologies Inc.
Manufacturer’s Address:	140 Green Pond Road
	Rockaway, New Jersey 07866
	U.S.A.
declares that the Product
Product Name:	a) Single Output System Power Supply
	b) General Purpose Power Supply
Model Number:	a) Agilent 6651A, 6652A, 6653A, 6654A, 6655A
	b) Agilent 6551A, 6552A, 6553A, 6554A, 6555A
conforms to the following Product Specifications:
Safety:	IEC 348:1978 / HD 401S1: 1981 1
EMC:	CISPR 11:1990 / EN 55011:1991 - Group 1 Class B
	IEC 801-2:1991 / EN 50082-1:1992 - 4 kV CD, 8 kV AD
	IEC 801-3:1984 / EN 50082-1:1992 - 3 V / m

IEC 801-4:1988 / EN 50082-1:1992 - 0.5 kV Signal Lines

1 kV Power Lines

Supplementary Information:

The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking accordingly.

Note 1: The product family was introduced prior to 12/93.

New Jersey	January 1997
Location	Date		Bruce Krueger / Quality Manager

European Contact: Your local Agilent Technologies Sales and Service Offices or Agilent Technologies GmbH, Department TRE, Herrenberger Strasse 130, D-71034 Boeblingen (FAX:[phone])

6

DECLARATION OF CONFORMITY

according to ISO/IEC Guide 22 and EN 45014

Manufacturer’s Name:	Agilent Technologies Inc.
Manufacturer’s Address:	140 Green Pond Road
	Rockaway, New Jersey 07866
	U.S.A.
declares that the Product
Product Name:	a) Single Output System Power Supply
	b) General Purpose Power Supply
Model Number:	a) Agilent 6671A, 6672A, 6673A, 6674A, 6675A
	b) Agilent 6571A, 6572A, 6573A, 6754A, 6575A
conforms to the following Product Specifications:
Safety:	IEC 348:1978 / HD 401S1: 1981 1
EMC:	CISPR 11:1990 / EN 55011:1991 - Group 1 Class B
	IEC 801-2:1991 / EN 50082-1:1992 - 4 kV CD, 8 kV AD
	IEC 801-3:1984 / EN 50082-1:1992 - 3 V / m

IEC 801-4:1988 / EN 50082-1:1992 - 0.5 kV Signal Lines

1 kV Power Lines

Supplementary Information:

The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking accordingly.

Note 1: The product family was introduced prior to 12/93.

New Jersey	January 1997
Location	Date		Bruce Krueger / Quality Manager

European Contact: Your local Agilent Technologies Sales and Service Offices or Agilent Technologies GmbH, Department TRE, Herrenberger Strasse 130, D-71034 Boeblingen (FAX:[phone])

7

		DECLARATION OF CONFORMITY
		according to ISO/IEC Guide 22 and EN 45014
	Manufacturer’s Name:	Agilent Technologies Inc.
	Manufacturer’s Address:	140 Green Pond Road
		Rockaway, New Jersey 07866
		U.S.A.
	declares that the Product
	Product Name:	Single Output System Power Supply
	Model Number:	Agilent 6680A, 6681A, 6682A, 6683A, 6684A
	conforms to the following Product Specifications:
	Safety:	IEC 348:1978 / HD 401S1: 1981 1
	EMC:	CISPR 11:1990 / EN 55011:1991 - Group 1 Class A
		IEC 801-2:1991 / EN 50082-1:1992 - 4 kV CD, 8 kV AD
		IEC 801-3:1984 / EN 50082-1:1992 - 3 V / m

IEC 801-4:1988 / EN 50082-1:1992 - 0.5 kV Signal Lines

1 kV Power Lines

Supplementary Information:

The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking accordingly.

Note 1: The product family was introduced prior to 12/93.

New Jersey	January 1997
Location	Date		Bruce Krueger / Quality Manager

European Contact: Your local Agilent Technologies Sales and Service Office or Agilent Technologies GmbH,

Department TRE, Herrenberger Strasse 130, D-71034 Boeblingen (FAX:[phone])

PRINTING HISTORY

The edition and current revision of this manual are indicated below. Reprints of this manual containing minor corrections and updates may have the same printing date. Revised editions are identified by a new printing date. A revised edition incorporates all new or corrected material since the previous printing date. Changes to the manual occurring between revisions are covered by change sheets shipped with the manual. In some cases, the manual change applies only to specific instruments. Instructions provided on the change sheet will indicate if a particular change applies only to certain instruments.

© Copyright 1993 Agilent Technologies Inc.	Edition 1	- November, 1993
	Edition 2	- March, 1995
	Reprinted - April 2000

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. Information contained in this document is subject to change without notice.

8

	Table Of Contents
1	General Information
	Introduction ...................................................................................................................................................	15
	Safety Considerations................................................................................................................................	16
	Instrument Identification ...........................................................................................................................	16
	Options ......................................................................................................................................................	16
	Accessories................................................................................................................................................	17
	Description ................................................................................................................................................	17
	Front Panel Programming........................................................................................................................	18
	Remote Programming..............................................................................................................................	18
	Analog Programming ..............................................................................................................................	18
	Output Characteristic...............................................................................................................................	19
	Specifications and Supplemental Characteristics ......................................................................................	19
	Performance Specifications for Series 664xA .........................................................................................	20
	Performance Specifications for Series 665xA .........................................................................................	25
	Performance Specifications for Series 667xA .........................................................................................	30
	Performance Specifications for Series 668xA .........................................................................................	35
	Supplemental Characteristics for Series 664xA ......................................................................................	21
	Supplemental Characteristics for Series 665xA ......................................................................................	26
	Supplemental Characteristics for Series 667xA ......................................................................................	31
	Supplemental Characteristics for Series 668xA ......................................................................................	36
	Supplemental GPIB Characteristics for All Models ................................................................................	40
	Operator Replaceable Parts List ................................................................................................................	41
2	Installation
	Inspection ......................................................................................................................................................	43
	Damage....................................................................................................................................................	43
	Packaging Material..................................................................................................................................	43
	Items Supplied.........................................................................................................................................	43
	Location and Temperature.........................................................................................................................	44
	Bench Operation......................................................................................................................................	44
	Rack Mounting ........................................................................................................................................	44
	Temperature Performance .......................................................................................................................	44
	Input Power Source ...................................................................................................................................	45
	Series 664xA and 665xA Supplies ..........................................................................................................	45
	Series 667xA Supplies.............................................................................................................................	45
	Series 668xA Supplies.............................................................................................................................	47
3	Turn-on Checkout
	Introduction ...................................................................................................................................................	49
	Preliminary Checkout..................................................................................................................................	49
	Power-on Checkout .....................................................................................................................................	50
	Using the Keypad ..........................................................................................................................................	50
	Shifted Keys ..............................................................................................................................................	50
	Backspace Key ..........................................................................................................................................	50
	Output Checkout..........................................................................................................................................	50
	Checking the Voltage Function .................................................................................................................	51
	Checking the Current Function..................................................................................................................	52
	Checking the Save and Recall Functions.....................................................................................................	53
	Determining GPIB Address.........................................................................................................................	53
	In Case of Trouble .......................................................................................................................................	53
	Line Fuse ...................................................................................................................................................	53
	Condensation Fault (Series 668xA only)...................................................................................................	55
	Error Messages ..........................................................................................................................................	55

9

4	User Connections
	Rear Panel Connections.................................................................................................................................	57
	Load Wire Selection ....................................................................................................................................	57
	Analog Connector........................................................................................................................................	58
	Digital Connector ........................................................................................................................................	58
	Connecting Series 664xA and 665xA Power Supplies to the Load .............................................................	59
	Output Isolation.........................................................................................................................................	59
	Load Considerations..................................................................................................................................	59
	Local Voltage Sensing ..............................................................................................................................	60
	Remote Voltage Sensing ...........................................................................................................................	61
	Operating Configurations ..........................................................................................................................	63
	Connecting One Supply to the Load.........................................................................................................	63
	Connecting Supplies in Auto-Parallel.......................................................................................................	64
	Connecting Supplies in Series ..................................................................................................................	65
	External Voltage Control...........................................................................................................................	65
	Connecting Series 667xA Power Supplies to the Load ...............................................................................	66
	Output Isolation.........................................................................................................................................	66
	Load Considerations..................................................................................................................................	67
	Local Voltage Sensing...............................................................................................................................	68
	Remote Voltage Sensing ...........................................................................................................................	68
	Operating Configurations ..........................................................................................................................	70
	Connecting One Supply to a Single Load......................................................................................................	70
	Connecting One Supply to Multiple Loads ..............................................................................................	70
	Connecting Supplies in Auto-Parallel.......................................................................................................	71
	Connecting Supplies in Series ..................................................................................................................	72
	External Voltage Control...........................................................................................................................	73
	Connecting Series 668xA Power Supplies to the Load ...............................................................................	74
	Output Isolation.........................................................................................................................................	74
	Load Considerations..................................................................................................................................	74
	Local Voltage Sensing...............................................................................................................................	75
	Remote Voltage Sensing ...........................................................................................................................	75
	Operating Configurations ..........................................................................................................................	76
	Connecting One Supply to a Single Load.................................................................................................	77
	Connecting One Supply to Multiple Loads ..............................................................................................	77
	Connecting Supplies in Auto-Parallel............................................................................................................	78
	Connecting Supplies in Series .................................................................................................................	78
	External Voltage Control...........................................................................................................................	79
	Controller Connections..............................................................................................................................	80
	Stand-Alone Connections ........................................................................................................................	80
	Linked Connections.................................................................................................................................	80
5	Front Panel Operation
	Introduction ...................................................................................................................................................	83
	Getting Acquainted.....................................................................................................................................	83
	Programming the Output ............................................................................................................................	86
	Introduction ...............................................................................................................................................	86
	Establishing Initial Conditions. .................................................................................................................	86
	Programming Voltage ...............................................................................................................................	87
	Programming Overvoltage Protection .......................................................................................................	87
	Programming Current................................................................................................................................	88
	Programming Overcurrent Protection........................................................................................................	89
	CV Mode vs. CC Mode ..............................................................................................................................	89
	Unregulated Operation ...............................................................................................................................	90
	Saving and Recalling States ......................................................................................................................	90
	Turn-on Conditions ...................................................................................................................................	90
	Setting the GPIB Address..............................................................................................................................	91

10

A	Calibration
	Introduction ...................................................................................................................................................	93
	Equipment Required...................................................................................................................................	93
	General Procedure ......................................................................................................................................	93
	Parameters Calibrated................................................................................................................................	93
	Test Setup ..................................................................................................................................................	94
	Front Panel Calibration .................................................................................................................................	94
	Entering the Calibration Values ...............................................................................................................	94
	Saving the Calibration Constants...............................................................................................................	94
	Disabling the Calibration Mode ................................................................................................................	94
	Changing the Calibration Password............................................................................................................	94
	Recovering From Calibration Problems .....................................................................................................	97
	Calibration over the GPIB .............................................................................................................................	98
	Calibration Example..................................................................................................................................	98
	Calibration Language Dictionary ..............................................................................................................	98
	CAL:CURR .............................................................................................................................................	98
	CAL:CURR:LEV ....................................................................................................................................	98
	CAL:CURR:MON (Series 668xA only)..................................................................................................	99
	CAL:PASS ..............................................................................................................................................	99
	CAL:SAVE .............................................................................................................................................	99
	CAL:STAT..............................................................................................................................................	99
	CAL:VOLT ...........................................................................................................................................	100
	CAL:VOLT:LEV ..................................................................................................................................	100
	CAL:VOLT:PROT ................................................................................................................................	100
	Agilent-Basic Calibration Program .........................................................................................................	100
B	Operation Verification
	Introduction .................................................................................................................................................	103
	Test Equipment Required .........................................................................................................................	103
	List of Equipment ....................................................................................................................................	103
	Current Monitoring Resistor....................................................................................................................	103
	Performing the Tests ................................................................................................................................	105
	General Measurement Techniques ..........................................................................................................	105
	Programming the Power Supply..................................................................................................................	105
	Order of Tests..........................................................................................................................................	105
	Turn-on Checkout....................................................................................................................................	105
	Voltage Programming and Readback Accuracy ..........................................................................................	105
	Current Programming and Readback Accuracy.......................................................................................	106
	Verification Test Parameters ....................................................................................................................	107
C	Line Voltage Conversion
	Series 664xA and 665xA Supplies ..............................................................................................................	115
	Series 667xA Supplies..............................................................................................................................	116
	Series 668xA Supplies..............................................................................................................................	117
D	Digital Port Functions
	Digital Connector ........................................................................................................................................	119
	Fault/Inhibit Operation .............................................................................................................................	119
	Changing the Port Configuration.................................................................................................................	122
	Digital I/O Operation...................................................................................................................................	122
	Relay Link Operation ..................................................................................................................................	123
E	Current Loop Compensation
	Function of Loop Compensation .................................................................................................................	125
	Setting the Loop Compensation Switch.......................................................................................................	128

11

F	Using Agilent 668xA Series Power Supplies in Autoparallel
	Auto parallel Procedure...............................................................................................................................	129
	Index
	References ...................................................................................................................................................	131
	Agilent Sales and Support Offices
	Contacts.......................................................................................................................................................	135

12

List of Figures

2-1.	Series 664xA/665xA Power Connection..................................................................................	45
2-2.	Connecting the Series 667xA Power Cord...............................................................................	46
2-3.	667xA Connection to a 3-Phase Line.......................................................................................	47
2-4.	Series 668xA Overall Wiring Diagram ....................................................................................	47
2-5.	Connecting the Series 668xA Power Cord...............................................................................	48
3-1.	Series 667xA Line Fuse ...........................................................................................................	54
4-1.	Rear Panel Analog Connector ..................................................................................................	58
4-2.	Rear Panel Digital Connector ..................................................................................................	58
4-3a.	Series 664xA/665xA Rear Panel Output Connections .............................................................	59
4-3b.	Series 664xA/665xA Single Load Connection.........................................................................	62
4-3c.	Series 664xA/665xA Multiple Load Connection .....................................................................	63
4-3d.	Series 664xA/665xA Auto-Parallel Connection ......................................................................	63
4-3e.	Using Series Diodes with Series 664xA/665xA Auto-Parallel Operation................................	64
4-3f.	Series 664xA/665xA Series Connection ..................................................................................	65
4-3g.	Series 664xA/665xA Analog Programming Connections ......................................................	66
4-4a.	Series 667xA Rear Panel Output Connections.........................................................................	67
4-4b.	Series 667xA Sense Lead Bypass Network..............................................................................	70
4-4c.	Series 667xA Single Load Connection ....................................................................................	70
4-4d.	Series 667xA Multiple Load Connection.................................................................................	71
4-4e.	Series 667xA Auto-Parallel Connection ..................................................................................	71
4-4f.	Series 667xA Series Connection. .............................................................................................	72
4-4g.	Series 667xA Analog Programming Connections....................................................................	73
4-5a.	Series 668xA Rear Panel Output Connections.........................................................................	74
4-5b.	Series 668xA Sense Lead Bypass Network.............................................................................	76
4-5c.	Series 668xA Single Load Connection . ..................................................................................	77
4-5d.	Series 668xA Multiple Load Connection.................................................................................	77
4-5e.	Series 668xA Auto-Parallel Connection. .................................................................................	78
4-5f.	Series 668xA Series Connection ..............................................................................................	79
4-5g.	Series 668xA Analog Programming Connections....................................................................	80
4-6.	Controller Connections ............................................................................................................	81
5-1.	Front Panel Controls and Indicators.........................................................................................	84
5-2.	Typical Power Supply Operating Curve ..................................................................................	87
A-l.	Calibration Test Setup..............................................................................................................	95
A-2.	Agilent BASIC Calibration Program .....................................................................................	101
B-l.	Verification Test Setup ..........................................................................................................	104
C-l.	Series 664xA Line Select Switches........................................................................................	115
C-2.	Series 665xA Line Select Jumpers.........................................................................................	116
C-3.	Series 667xA Line Select Switch ..........................................................................................	116
C-4.	Removing the Series 668xA Inner Cover...............................................................................	118
C-5.	Series 668xA Line Conversion Jumpers ................................................................................	118
D-1.	Digital Port Connector ...........................................................................................................	119
D-2.	Example of Inhibit Input ........................................................................................................	120
D-3.	Examples of Fault Outputs.....................................................................................................	121
D-4.	Digital Port Configuration Jumper.........................................................................................	121
D-5.	Digital I/O Port Applications ................................................................................................	122
D-6.	Relay Link Connections.........................................................................................................	123
E-l.	CC Loop Compensation Curves for Series 668xA.................................................................	126
E-2.	CC Loop Compensation Switch for Series 668xA.................................................................	128
F-1.	Master/Slave Current Division...............................................................................................	130

13

List of Tables

l-la.	Performance Specifications - Series 664xA .............................................................................	20
l-lb.	Supplemental Characteristics - Series 664xA ..........................................................................	21
1-2a.	Performance Specifications - Series 665xA ............................................................................	25
1-2b.	Supplemental Characteristics - Series 665xA ..........................................................................	26
1-3a.	Performance Specifications - Series 667xA ............................................................................	30
1-3b.	Supplemental Characteristics - Series 667xA .........................................................................	31
1-4a.	Performance Specifications - Series 668xA .............................................................................	35
1-4b.	Supplemental CharacteristicsSeries 668xA ...........................................................................	36
1-5.	Supplemental GPIB Characteristics for All Models ................................................................	40
1-6.	Operator Replaceable Parts List...............................................................................................	41
2-1.	Items Supplied .........................................................................................................................	43
3-1.	Checking the Voltage Functions ..............................................................................................	50
3-2.	Checking the Current Functions...............................................................................................	52
3-3.	Power-on Selftest Errors ..........................................................................................................	55
3-4.	Runtime Error Messages ..........................................................................................................	56
4-1.	Copper Wire Ampere Capacity and Resistance .......................................................................	57
5-1.	Front Panel Controls and Indicators.........................................................................................	84
A-l.	Equipment Required for Calibration ........................................................................................	93
A-2.	Typical Front Panel Calibration Procedure ..............................................................................	96
A-3.	GPIB Calibration Error Messages...........................................................................................	97
B-l.	Equipment Required for Verification Tests ...........................................................................	103
B-2.	Voltage Programming and Readback Accuracy Tests ...........................................................	105
B-3.	Current Programming and Readback Accuracy Test .............................................................	106
B-4.	Test Parameters for Series 664xA..........................................................................................	107
B-5.	Test Parameters for Series 665xA..........................................................................................	109
B-6.	Test Parameters for Series 667xA..........................................................................................	111
B-7.	Test Parameters for Series 668xA..........................................................................................	113
E-l.	Settings for CC Loop Compensation Switch..........................................................................	125

14

1

General Information

Introduction

Two guides are shipped with your power supply - an Operating Guide (this document) and a Programming Guide. You will find information on the following tasks in these guides:

Quick Document Orientation1
Topic	Location
Calibrating the power supply	Appendix A - this guide
Compatibility programming language	Appendix B - Programming Guide
Configuring the digital port	Appendix D - this guide
Line voltage:
Connecting ac power source	Chapter 2 - this guide
Converting the ac source voltage	Appendix B - this guide
Source current, frequency, and power ratings	Chapter 1- this guide
Operator replaceable parts	Chapter 1- this guide
Operator troubleshooting	Chapter 3 - this guide
Output impedance characteristics	Chapter 1- this guide
Power supply accessories	Chapter 1- this guide
Power supply operating characteristics	Chapter 1- this guide
Power supply options	Chapter 1- this guide
Power supply performance specifications	Chapter 1- this guide
Programming
discrete fault inhibit (DFI) operation	Chapter 4 - Programming Guide
from the analog port	Chapter 4 - this guide
from the front panel	Chapter 5 - this guide
over the GPIB	Chapter 2 - Programming Guide
remote inhibit (RI) operation	Chapter 4 - Programming Guide
status registers	Chapter 4 - Programming Guide
Quick operating checkout (without load)	Chapter 3 - this guide
Rack mounting	Chapter 2 - this guide
SCPI programming language	Chapter 3 - Programming Guide
Wiring
analog programming port	Chapter 4 - this guide
discrete fault indicator (DFI) operation	Appendix D - this guide
digital port	Appendix D - this guide
GPIB controller	Chapter 4 - this guide
load or loads	Chapter 4 - this guide
local sensing	Chapter 4 - this guide
remote inhibit (RI) operation	Chapter 4 - this guide
remote sensing	Chapter 4 - this guide

1 See the Table of Contents for complete list of topics.

General Information 15

Safety Considerations

This power supply is a Safety Class 1 instrument, which means it has a protective earth terminal. That terminal must be connected to earth ground through a power source equipped with a 3-wire ground receptacle. Refer to the Safety Summary page at the beginning of this guide for general safety information. Before installation or operation, check the power supply and review this guide for safety warnings and instructions. Safety warnings for specific procedures are located at appropriate places in the guide.

Instrument Identification

The power supply is identified by a unique two-part serial number, such as, 3343A-00177. The first part, or prefix, is a number-letter combination that provides the following information:

3343 = The year and week of manufacture or last significant design change. Add 1960 to the first two digits to determine the year. For example, 32=1992, 33=1993, etc. The last two digits specify the week of the year (43 = the 43rd week).

A = The letter indicates the country of manufacture, where A = USA.

Options

Option

100

200

220

240

400

601

602

831

832

834

841

842

843

844

861

862

908

List of Options
Description	Used with Agilent Series
	664xA	665xA	667xA	668xA
Input power 100 Vac, nominal	x	x
Input power 200 Vac, nominal			x
Input power 220 Vac, nominal	x	x
Input power 240 Vac, nominal	x	x
Input power 360-440 Vac, 3 -phase				x
Output connector kit required for bench applications				x
Bus bar spacers for paralleling power supplies				x
Power cord, 12 AWG, UL listed, CSA certified, without plug			x
Power cord, 4 mm2, harmonized, without plug			x
Power cord, 10 AWG, UL listed, CSA certified, without plug			x
Power cord, 12 AWG, UL listed, CSA certified, with NEMA			x
6-20P 20A/250V plug
Power cord, 4 mm2, harmonized, with IEC 309 32A/220V			x
plug
Power cord, 12 AWG, UL listed, CSA certified, with JIS			x
C8303 25A/250V plug
Power cord, 10 AWG, UL listed, CSA certified, with NEMA			x
L6-30P-30A/250V locking plug
Power cord, 10 AWG, UL listed, 300 V, CSA certified,				x
without plug
Power cord, 2.5 mm2, 4-wire, harmonized, without plug				x
Rack mount kit (Agilent 5062-3974)	x
Rack mount kit (Agilent 5062-3977) Support rails (E3663A)		x	x
are required.
Rack mount kit (Agilent 5062-3977 & 5062-3974) Support				x
rails (E3663A) are required.

16 General Information

	List of Options (continued)
Option	Description		Used with Agilent Series
			664xA	665xA	667xA	668xA
909	Rack mount kit with handles (Agilent 5062-3975)		x
909	Rack mount kit with handles (Agilent 5062-3983) Support			x	x
	rails (E3663A) are required.
	Rack mount kit with handles (Agilent 5062-3983 &					x
	5062-3974) Support rails (E3663A) are required.
910	Service manual with extra Operating and Programming		x	x	x	x
	Guides
ABD	Quick-Start Guide German		x	x	x	x
ABE	Quick-Start Guide, Spanish		x	x	x	x
ABF	Quick-Start Guide, French		x	x	x	x
ABJ	Operating Manual, Japanese		x	x	x	x
ABZ	Quick-Start Guide, Italian		x	x	x	x
AB0	Quick-Start Guide, Taiwanese		x	x	x	x

Accessories

List of Accessories
Description Agilent No.	Agilent No.
Fuse replacement kit for Series 668xA
16 AM for 360-440 Vac, 3-phase line	5060-3512
30 AM for 180-235 Vac, 3-phase line	5060-3513
GPIB cable (all models)
0.5 meters (1.6 ft)	10833D
1.0 meter (3.3 ft)	10833A
2.0 meters (6.6 ft)	10833B
4.0 meters ( 13 .2 ft)	10833C
Serial link cable (all models)
2.0 meters (6.6 ft)	5080-2148
Slide mount kit
heavy duty, for Series 667xA/668xA	1494-0058
standard, for Series 664xA/665xA	1494-0059

Description

These units form a family of unipolar, GPIB programmable power supplies organized as follows:

Family	Power	Models
Series 664xA	200 W	AGILENT 6641A, 6642A, 6643A, 6644A, 6645A
Series 665xA	500 W	AGILENT 6651A, 6652A, 6653A, 6654A, 6655A
Series 667xA	2000 W	AGILENT 6671A, 6672A, 6673A, 6674A, 6675A
Series 668xA	5000 W	AGILENT 6680A, 6681A, 6682A, 6683A, 6684A

Each power supply is programmable locally from the front panel or remotely via a rear-panel analog control port.

General Information 17

Operational features include:

■Constant voltage (CV) or constant current (CC) output over the rated output range.

■Built-in overvoltage (OV), overcurrent (OC), and overtemperature (OT) protection.

■Automatic turn-on selftest.

■Pushbutton nonvolatile storage and recall of up to 5 operating states (4 in Series 668xA supplies).

■Local or remote sensing of output voltage.

■Auto-parallel operation for increased total current.

■Series operation for increased total voltage.

■Analog input for remote programming of voltage and current.

■Voltage output for external monitoring of output current.

■User calibration from the front panel.

Front Panel Programming

The front panel has both rotary (RPG) and keypad controls for setting the output voltage and current. The panel display provides digital readouts of the output voltage and current. Other front panel controls permit:

■Enabling or disabling the output.

■Setting the overvoltage protection (OVP) trip voltage.

■Enabling or disabling the overcurrent protection (OCP) feature.

■Saving and recalling operating states.

■Setting the GPIB address.

■Reading GPIB error message codes.

■Calibrating the power supply, including changing the calibration protection password.

Remote Programming

The power supply may be remotely programmed via the GPIB bus and/or from an analog input port. GPIB programming is with SCPI (Standard Commands for Programmable Instruments) commands that make the power supply programs compatible with those of other GPIB instruments. (A software-controlled Compatibility Mode also permits programming in the command set of the Agilent 6030xA Autoranging Series.) In addition to control functions, SCPI programming permits writing to the front panel LCD and complete calibration functions. Power supply status registers permit remote monitoring of the following conditions:

■Overvoltage, overcurrent, overtemperature, and unregulated states.

■Operating mode (constant voltage or constant current).

■State of the RI (remote inhibit) input signal.

■Power-on status (PON).

■Status of the output queue (QYE).

■Pending triggers (WTG).

■GPIB interface programming errors (CME, DDE, and EXE).

■Calibration state (enabled or disabled).

The status registers can be programmed to generate an output fault signal (FLT) upon the occurrence of one or more selected status events.

Analog Programming

The power supply has an analog port for remote programming. The output voltage and/or current of the power supply may be controlled by individual d-c programming voltages applied to this port. The port also provides a monitor output that supplies a d-c voltage proportional to the output current.

18 General Information

Output Characteristic

General

The power supply can operate in either CV (constant voltage) or CC (constant current) over its voltage and current ratings (see Table 1-l). The operating locus is shown by the Output Characteristic Curve in Table 1-2. The operating point is determined by the voltage setting (Vs), the current setting (Is), and the load impedance. Two operating points are shown. Point 1 is defined by the load line cutting the operating locus in the constant-voltage region. This region defines the CV mode. Point 2 is defined by the load line cutting the operating locus in the constant-current region. This region defines the CC mode.

Downprogramming

The power supply can sink current for more rapid down programming in the CV mode. For Series 664xA and 665xA supplies, this capability is defined by the second quadrant area (-Is) of the Output Characteristic Curve. These supplies can sink about 20% of their maximum rated positive output current. For Series 667xA and 668xA power supplies, this is an uncharacterized current-sinking area that provides a limited downprogramming capability.

Specifications and Supplemental Characteristics

Tables 1-1 through 1-4 list the specifications and supplemental characteristics for the Series 664xA, 665xA, 667xA, and 668xA power supplies. The organization is as follows:

Series	Specifications	Characteristics
6641A-6645A	Table l-la	Table l-lb
6651A-6655A	Table 1-2a	Table 1-2b
6671A-6675A	Table 1-3a	Table 1-3b
6680A-6684A	Table 1-4a	Table 1-4b

Specifications are performance parameters warranted over the specified temperature range.

Supplemental Characteristics are not warranted but are descriptions of performance determined either by design or type testing.

General Information 19

	Table 1-1a. Performance Specifications for Series 664xA1
Parameter			Agilent Model Number
		6641A	6642A	6643A		6644A	6645A
Output Ratings
Voltage:		0 - 8 V	0 - 20 V	0 - 35 V		0 - 60 V	0 - 120 V
Current:@ 40°C
		0 - 20 A	0 - 10 A	0 - 6 A		0 - 3.5 A	0 - 1.5 A
Current:@ 50°C
		0 - 18 A	0 - 9 A	0 - 5.4 A		0 - 3.2 A	0 - 1.4 A
Current:@ 55°C
		0 - 17 A	0 - 8.5 A	0 - 5.1 A		0 - 3.0 A	0 -1.4 A
Programming Accuracy (@ 25 ± 5 °C)
Voltage:	0.06% +	5 mV	10 mV	15 mV		26 mV	51 mV
Current:
	0 . l5 % +	26 mA	13 mA	6.7 mA		4.1 mA	1.7 mA

Ripple & Noise (from 20 Hz to 20 MHz with outputs ungrounded, or with either output terminal grounded)

Constant Voltage:	rms	300 μV	300 μV	400 μV		500 μV
Constant Voltage:	p-p	3 mV	3 mV	4 mV		5 mV
Constant Current:	rms	10 mA	5 mA	3 mA		1.5 mA
Readback Accuracy (from front panel or over GPIB with respect to actual output @ 25 ±:5 °C)
Voltage:	0.07% +	6 mV	15 mV	25 mV		40 mV
+Current	0.15% +	18 mA	9.1 mA	5 mA		3 mA
-Current	0.35% +	40 mA	20 mA	12 mA		6.8 mA
Load Regulation (change in output voltage or current for any load change within ratings)
Voltage		1 mV	2 mV	3 mV		4 mV
Current:		1 mA	0.5 mA	0.25 mA		0.25 mA
Line Regulation (change in output voltage or current for any line change within ratings
Voltage:		0.5 mV	0.5 mV	1 mV		1 mV
Current:		1 mA	0.5 mA	0.25 mA		0.25 mA

700 μV

7 mV

1 mA

80 mV

1.3 mA

2.9 mA

5 mV

0.25 mA

2 mV

0.25 mA

Transient Response Time (for the output voltage to recover to its previous level (within 0.1% of the rated voltage or 20 mV, whichever is greater) following any step change in load current up to 50% of the rated current.

	< 100 μs
AC Input Ratings (selectable via internal switching - see Appendix B)
Nominal line voltage
100,120,220,240 Vac:	-13%, +6 %
230 Vac:	-10%, +10%
Frequency range:	47-63 Hz
Output Terminal Isolation	±240 Vdc (maximum, from chassis ground)

Notes: 1For Supplemental Characteristics, see Table 1-1b.

20 General Information

Table 1-1b. Supplemental Characteristics for Series 664xA1
Parameter				Agilent Model Number
		6641A		6642A		6643A		6644A		6645A
Output Programming Range (maximum programmable values)
Voltage:		8.190 V		20.475 V		35.831 V		61.425 V		122.85 V
Current:		20.475 A		10.237 A		6.142 A		3.583 A		1.535 A
Overvoltage Protection (OVP):		8.8 V		22.0 V		38.5 V		66.0 V		132.0 V
Average Resolution
Voltage:		2 mV		5 mV		10 mV		15 mV		30 mV
Current:		6 mA		3 mA		2 mA		1.2 mA		0.5 mA
Overvoltage Protection (OVP):		13 mV		30 mV		54 mV		93 mV		190 mV
Accuracy
Overvoltage Protection (OVP):		160 mV		400 mV		700 mV		1.2 V		2.4 V
Analog Programming (VP):*
0.36% +		6 mV		15 mV		27 mV		45 mV		90 mV
Analog Programming (IP):*
7.6% +		18 mA		9.2 mA
1.5% +						5.5 mA		3.2 mA		1.4 mA
Current Monitor (+IM):*
7.7% +		65 mA		32 mA
1.6 % +						8.1 mA		7.1 mA		1.8 mA
*Referenced to supply output

Drift Temperature Stability (following a 30-minute warmup, change in output over 8 hours under constant line, load, and ambient temperature)

Voltage:	0.02% +		0.4 mV	1 mV	2 mV	3 mV	6 mV
Current:	0.02% +		16 mA	6 mA	3 mA	2 mA	1 mA
Temperature Coefficients (change per °C)
Voltage:
	60 ppm +		0.1 mV	0.2 mV	0.3 mV	0.5 mV	1.1 mV
+Current:	95 ppm +		0.82 mA	0.41 mA	0.18 mA	0.12 mA	0.04 mA
Voltage Readback:	60 ppm +		0.2 mV	0.5 mV	0.75 mV	1.3 mV	2.6 mV
+Current Readback:	95 ppm +		1.2 mA	0.62 mA	0.33 mA	0.20 mA	0.08 mA
--Current Readback:	110 ppm +		1.2 mA	0.62 mA	0.33 mA	0.20 mA	0.08 mA
Overvoltage Protection (OVP):
	200 ppm +		1.6 mV	3.3 mV	5 mV	13 mV	24 mV
Analog Programming (VP):
	60 ppm +		0.1 mV	0.25 mV	0.4 mV	0.7 mV	1.25 mV
Analog Programming (IP):
	90 ppm +		0.56 mA	0.28 mA	0.17 mA	0.1 mA	0.04 mA
Current Monitor (+IM):
	75 ppm +		0.61 mA	0.3 mA	0.06 mA	0.06 mA	0.02 mA
Maximum Input Power:				480 VA; 400 W, 60 W with no load

Notes:	1For Performance Specifications, see Table 1-la.
:

General Information 21

Load Voltage:

Table 1-lb. Supplemental Characteristics for Series 664xA (continued)1
Parameter		Agilent Model Number
	6641A	6642A	6643A	6644A	6645A
Maximum AC Line Current Ratings
100 Vac nominal:			4.4 A rms
120 Vac nominal:			3.8 A rms
220 Vac nominal:			2.2 A rms
230 Vac nominal:			2.1 A rms
240 Vac nominal:			2.0 A rms
Maximum Reverse Bias Current:	With AC input power applied and the dc output reverse
	biased by an external dc source, the supply will continuously
	withstand without damage a current equal to its output
	current rating (see Table 1- 1a).
Remote Sensing Capability
Voltage Drop Per Lead:	Up to 1/2 of rated output voltage.
Load Regulation:	Add 3 mV to spec (see Table l-la) for each l-volt change in
	the + output lead due to load current changes.

Subtract voltage drop in load leads from specified output voltage rating.

Command Processing Time (Average time for output voltage to change after receipt of digital data when the supply is connected directly to the GPIB Bus):

20 ms

Downprogrammer Current Capability (± 15%):

5.8 A

2.5 A

1.5 A

0.9 A

0.75 A

Output Voltage Programming Response Time

Rise/Fall Time (time for output to change from 90 % to 10% or from 10% to 90% of its total excursion):

<15 ms

Settling Time (time for output change to settle within 1 LSB (0.025% x rated voltage) of its final value):

Monotonicity:

Auto-Parallel Configuration:

Analog Programming (IP & VP)

Input Signal:*

Input Impedance:

*Signal source must be isolated.

Current Monitor Output (+IM):

Savable States

Nonvolatile Memory Locations: Nonvolatile Memory Write Cycles: Prestored State (factory default):

<60 ms

Output is monotonic over entire rated voltage, current, and temperature range.

Up to 3 identical models

0 to -5 V

10 kΩ, nominal

0 to -5 V represents zero to full-scale current output

5 ( 0 through 4) 40,000, typical Location 0

Notes: lFor Performance Specifications, see Table l-la.

22 General Information

Table 1-1b. Supplemental Characteristics for Series 664xA (continued)1

Parameter

Digital Port Characteristics

GPIB Interface Capabilities

Serial Link Capabilities

Recommended Calibration Interval:

Safety Compliance

Complies with:

Designed to comply with:

RFI Suppression (complies with):

Dimensions

Width:

Height (including removable feet):

Depth (including safety cover):

All Models

(see Table 1-5)

(see Table 1-5)

(see Table 1-5)

1 year

CSA 22.2 No.231,IEC 348

UL 1244

CISPR-ll, Group 1, Class B

425.5 mm (16.75 in)

88.1 mm (3.5 in)

439 mm (17.3 in)

	Note 1: For Performance Specifications, see Table l-la.:
Weight
Net:		14.2 kg (31.4 lb)
Shipping:		16.3 kg (36 lb)
Output Characteristic Curve:

Notes: lFor Performance Specifications, see Table l-la.

General Information 23

Table 1-1b. Supplemental Characteristics for Series 664xA (continued)1

Parameter

All Models

Output Impedance Curves (Typical):

Notes: lFor Performance Specifications, see Table l-la.

24 General Information

	Table 1-2a. Performance Specifications for Series 665xA1
Parameter			Agilent Model Number
		6651A	6652A	6653A		6654A	6655A
Output Ratings
Voltage:		0 - 8 V	0 - 20 V	0- 35 V		0 - 60 V	0 - 120 V
Current:@ 40°C
		0 - 50 A	0 - 25 A	0 - 15 A		0 - 9 A	0 - 4 A
Current:@ 50°C
		0 - 45 A	0 - 22.5 A	0 - 13.5 A		0 - 8.1 A	0 - 3.6 A
Current:@ 55°C
		0 - 42.5 A	0 - 21.3 A	0 - 12.8 A		0 - 7.7 A	0 -3.4 A
Programming Accuracy (@ 25 ± 5 °C)
Voltage:	0.06% +	5 mV	10 mV	15 mV		26 mV	51 mV
Current:
	0 . l5 % +	60 mA	25 mA	13 mA		8 mA	4 mA

Ripple & Noise (from 20 Hz to 20 MHz with outputs ungrounded, or with either output terminal grounded)

Constant Voltage:	rms	300 μV	300 μV	400 μV		500 μV
Constant Voltage:	p-p	3 mV	3 mV	4 mV		5 mV
Constant Current:	rms	25 mA	10 mA	5 mA		3 mA
Readback Accuracy (from front panel or over GPIB with respect to actual output @ 25 ± 5 °C)
Voltage:	0.07% +	6 mV	15 mV	25 mV		40 mV
+Current	0.15% +	67 mA	26 mA	15 mA		7 mA
-Current	0.35% +	100 mA	44 mA	24 mA		15 mA
Load Regulation (change in output voltage or current for any load change within ratings)
Voltage:		1 mV	2 mV	3 mV		4 mV
Current:		2 mA	1 mA	0.5 mA		0.5 mA
Line Regulation (change in output voltage or current for any line change within ratings
Voltage:		0.5 mV	0.5 mV	1 mV		1 mV
Current:		2 mA	1 mA	0.75 mA		0.5 mA

700 μV

7 mV

2 mA

80 mV

3 mA

7 mA

5 mV

0.5 mA

2 mV

0.5 mA

Transient Response Time (for the output voltage to recover to its previous level (within 0.1% of the rated voltage or 20 mV, whichever is greater) following any step change in load current up to 50% of the rated current.

	< 100 μs
AC Input Ratings (selectable via internal switching - see Appendix B)
Nominal line voltage
100,120,220,240 Vac:	-13%, +6 %
230 Vac:	-10%, +10%
Frequency range:	47-63 Hz
Output Terminal Isolation	±240 Vdc (maximum, from chassis ground)

Notes: 1For Supplemental Characteristics, see Table 1-2b.

General Information 25

Table 1-2b. Supplemental Characteristics for Series 665xA1
Parameter				Agilent Model Number
		6651A		6652A		6653A		6654A		6655A
Output Programming Range (maximum programmable values)
Voltage:		8.190 V		20.475 V		35.831 V		61.425 V		122.85 V
Current:		51.188 A		25.594 A		15.356 A		9.214 A		4.095 A
Overvoltage Protection (OVP):		8.8 V		22.0 V		38.5 V		66.0 V		132.0 V
Average Resolution
Voltage:		2 mV		5 mV		10 mV		15 mV		30 mV
Current:		15 mA		7 mA		4 mA		2.5 mA		1 mA
Overvoltage Protection (OVP):		13 mV		30 mV		54 mV		93 mV		190 mV
Accuracy
Overvoltage Protection (OVP):*		160 mV		400 mV		700 mV		1.2 V		2.4 V
Analog Programming (VP):*
0.36% +		6 mV		15 mV		27 mV		45 mV		90 mV
Analog Programming (IP):*
7% +		75 mA		31 mA		16 mA		8 mA		5 mA
Current Monitor (+IM):*
7% +		730 mA		400 mA		120 mA		80 mA		75 mA
*Referenced to supply output

Drift Temperature Stability (following a 30-minute warmup, change in output over eight hours under constant line, load, and ambient temperature)

Voltage:	0.02% +		0.4 mV	1 mV	2 mV	3 mV	6 mV
Current:	0.02% +		40 mA	15 mA	8 mA	5 mA	2.5 mA
Temperature Coefficients (change per °C)
Voltage:
	60 ppm +		0.1 mV	0.2 mV	0.3 mV	0.5 mV	1.1 mV
+Current:	90 ppm +		1.4 mA	0.7 mA	0.3 mA	0.2 mA	0.2 mA
Voltage Readback:	60 ppm +		0.2 mV	0.5 mV	0.75 mV	1.3 mV	2.6 mV
+Current Readback:	90 ppm +		1.7 mA	0.9 mA	0.5 mA	0.3 mA	0.2 mA
-Current Readback:	105 ppm +		1.7 mA	0.9 mA	0.5 mA	0.3 mA	0.2 mA
Overvoltage Protection (OVP):
	200 ppm +		1.6 mV	3.3 mV	5 mV	13 mV	24 mV
Analog Programming (VP):
	60 ppm +		0.1 mV	0.25 mV	0.4 mV	0.7 mV	1.25 mV
Analog Programming (IP):
	90 ppm +		1.4 mA	0.7 mA	0.3 mA	0.2 mA	0.15 mA
Current Monitor (+IM):
	80 ppm +		1.4 mA	0.7 mA	0.3 mA	0.2 mA	0.15 mA
Maximum Input Power				1380 VA; 1100 W, 120 W with no load

Notes: 1For Performance Specifications, see Table 1-2a.

26 General Information

Load Voltage:

Table 1-2b. Supplemental Characteristics for Series 665xA (continued)1
Parameter		Agilent Model Number
	6651A	6652A	6653A	6654A	6655A
Maximum AC Line Current Ratings
100 Vac nominal:		12 A rms (15 AM fuse)
120 Vac nominal:		10 A rms (12 AM fuse)
220 Vac nominal:		5.7 A rms (7 AM fuse)
230 Vac nominal:		5.5 A rms (7 AM fuse)
240 Vac nominal:		5.3 A rms (7 AM fuse)
Maximum Reverse Bias Current:	With AC input power applied and the dc output reverse
	biased by an external dc source, the supply will continuously
	withstand without damage a current equal to its output
	current rating (see Table 1- 2a) .
Remote Sensing Capability
Voltage Drop Per Lead:	Up to 1/2 of rated output voltage.
Load Regulation:	Add 3 mV to spec (see Table l-2a) for each l-volt change in
	the + output lead due to load current changes.

Subtract voltage drop in load leads from specified output voltage rating.

Command Processing Time (Average time for output voltage to change after receipt of digital data when the supply is connected directly to the GPIB Bus):

20 ms

Downprogrammer Current Capability (± 15%):

11.6 A

5 A

3 A

1.8 A

1.5 A

Output Voltage Programming Response Time

Rise/Fall Time (time for output to change from 90 % to 10% or from 10% to 90% of its total excursion):

<15 ms

Settling Time (time for output change to settle within 1 LSB (0.025% x rated voltage) of its final value):

Monotonicity:

Auto-Parallel Configuration:

Analog Programming (IP & VP)

Input Signal:*

Input Impedance:

*Signal source must be isolated.

Current Monitor Output (+IM):

Savable States

Nonvolatile Memory Locations: Nonvolatile Memory Write Cycles: Prestored State (factory default):

<60 ms

Output is monotonic over entire rated voltage, current, and temperature range.

Up to 3 identical models

0 to -5 V

10 kΩ, nominal

0 to -5 V represents zero to full-scale current output.

5 ( 0 through 4) 40,000, typical Location 0

Notes: lFor Performance Specifications, see Table l-2a.

General Information 27

Table 1-2b. Supplemental Characteristics for Series 665xA (continued)1

Parameter

Digital Port Characteristics

GPIB Interface Capabilities

Serial Link Capabilities

Recommended Calibration Interval:

Safety Compliance

Complies with:

Designed to comply with:

RFI Suppression (complies with):

Dimensions

Width:

Height (including removable feet):

Depth (including safety cover):

Weight

Net:

Shipping:

All Models

(see Table 1-5)

(see Table 1-5)

(see Table 1-5)

1 year

CSA 22.2 No.231,IEC 348

UL 1244

CISPR-ll, Group 1, Class B

425.5 mm (16.75 in)

132.6 mm (5.22 in)

497.8 mm (19.6 in)

25 kg (54 lb)

28 kg (61 lb)

Output Characteristic Curve:

Notes: lFor Performance Specifications, see Table l-2a.

28 General Information

Table 1-2b. Supplemental Characteristics for Series 665xA (continued)1

Parameter

All Models

Output Impedance Curves (Typical):

Notes: lFor Performance Specifications, see Table l-2a.

General Information 29

	Table 1-3a. Performance Specifications for Series 667xA1
Parameter			Agilent Model Number
		6671A	6672A	6673A		6674A		6675A
Output Ratings
Voltage:		0 - 8 V	0 - 20 V	0- 35 V		0 - 60 V		0 - 120 V
Current:@ 0 to 55°C
		0 - 220 A	0 - 100 A	0 - 60 A		0 - 35 A		0 - 18 A
Programming Accuracy (@ calibration		temperature* ± 5 °C)
Voltage:		8 mV
	0.04% +		20 mV	35 mV		60 mV		120 mV
Current:
	0 . l % +	125 mA	60 mA	40 mA		25 mA		12 mA
Ripple & Noise (from 20 Hz to 20 MHz with outputs ungrounded, or with either output terminal grounded)
Constant Voltage:	rms	650 μV	750 μV	800 μV		1.25 mV		1.9 mV
Constant Voltage:	p-p	7 mV	9 mV	9 mV		11 mV		16 mV
Constant Current:	rms	200 mA	100 mA	40 mA		25 mA		12 mA
Readback Accuracy (from front panel or		over GPIB with respect to actual output @ calibration temp1 ± 5 °C)
Voltage:	0.05% +	12 mV	30 mV	50 mV		90 mV		180 mV
Current:	0.1% +	150 mA	100 mA	60 mA		35 mA		18 mA
Load Regulation (change in output voltage or current for any load change within ratings)
Voltage:	0.002% +	300 μV	650 μV	1.2 mV		2 mV		4 mV
Current:	0.005% +	10 mA	7 mA	4 mA		2 mA		1 mA
Line Regulation (change in output voltage or current for any line change within ratings
Voltage:	0.002% +	300 μV	650 μV	1.2 mV		2 mV		4 mV
Current:	0.005% +	10 mA	7 mA	4 mA		2 mA		1 mA
								bisep>

Transient Response Time (for the output voltage to recover to its previous level (within 0.1% of the rated voltage or 20 mV, whichever is greater) following any step change in load current up to 50% of the rated current.

					< 900 μs
AC Input Ratings (selectable via internal switching - see Appendix B)
Nominal line voltage
200 Vac:*				174-220 Vac
*below 185 Vac, derate output voltage	7.8 V		18.0 V		31.5 V	56.5 V	108 V
linearly to :
230 Vac:				191-250 Vac
Frequency range:				47-63 Hz
Output Terminal Isolation		±240 Vdc (maximum, from chassis ground)

Notes: 1For Supplemental Characteristics, see Table 1-3b.

30 General Information