HP 6632B, 6633B, 66332A, 6634B, 6631B User Manual

USER’S GUIDE

Dynamic Measurement DC Source

HP Model 66332A

System DC Power Supply

HP Model 6631B, 6632B, 6633B, 6634B

For instruments with Serial Numbers:

HP 66332A: US36320401 and up
HP 6631B: US37470101 and up
HP 6632B: US36350826 and up
HP 6633B: US36390236 and up
HP 6634B: US36380206 and up

HP Part No. 5962-8196

Microfiche Part No. 5962-8197

Printed in USA: July 1999

Warranty Information

CERTIFICATION

Hewlett-Packard Company certifies that this product met its published specifications at time of shipment
from the factory. Hewlett-Packard 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 Hewlett-Packard hardware product is warranted against defects in material and workmanship for a
period of three years from date of delivery. HP software and firmware products, which are designated by
HP 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 Hewlett-Packard Company will, at its
option, either repair or replace products which prove to be defective. HP does not warrant that the
operation for 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 HP. Customer shall prepay shipping charges by (and shall pay all duty and taxes) for
products returned to HP for warranty service. Except for products returned to Customer from another
country, HP shall pay for return of products to Customer.

Warranty services outside the country of initial purchase are included in HP's product price, only if
Customer pays HP international prices (defined as destination local currency price, or U.S. or Geneva
Export price).

If HP 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 HP.

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. HP 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. HP
SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.

ASSISTANCE

The above statements apply only to the standard product warranty. Warranty options, extended support
contacts, product maintenance agreements and customer assistance agreements are also available.
Contact your nearest Hewlett-Packard Sales and Service office for further information on HP's full line of
Support Programs.

2

Safety Summary

The following general safety precautions must be observed during all phases of operation of this instrument.

Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety

standards of design, manufacture, and intended use of the instrument. Hewlett-Packard Company assumes no

liability for the customer's failure to comply with these requirements.

GENERAL

This product is a Safety Class 1 instrument (provided with a protective earth terminal). The protective features of
this product may be impaired if it is used in a manner not specified in the operation instructions.

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

ENVIRONMENTAL CONDITIONS

This instrument is intended for indoor use in an installation category II, pollution degree 2 environment. It is
designed to operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters. Refer to the
specifications tables for the ac mains voltage requirements and ambient operating temperature range.

BEFORE APPLYING POWER

Verify that the product is set to match the available line voltage, the correct fuse is installed, and all safety
precautions are taken. Note the instrument's external markings described under "Safety Symbols".

GROUND THE INSTRUMENT

To minimize shock hazard, the instrument chassis and cover must be connected to an electrical ground. The
instrument must be connected to the ac power mains through a grounded power cable, with the ground wire
firmly connected to an electrical ground (safety ground) at the power outlet. Any interruption of the protective
(grounding) conductor or disconnection of the protective earth terminal will cause a potential shock hazard that
could result in personal injury.

ATTENTION: Un circuit de terre continu est essentiel en vue du fonctionnement sécuritaire de l'appareil.
Ne jamais mettre l'appareil en marche lorsque le conducteur de mise … la terre est d‚branch‚.

FUSES

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

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

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

DO NOT REMOVE THE INSTRUMENT COVER

Operating personnel must not remove instrument covers. Component replacement and internal adjustments must
be made only by qualified service personnel.

Instruments that appear damaged or defective should be made inoperative and secured against unintended
operation until they can be repaired by qualified service personnel.

3

SAFETY SYMBOLS

Direct current

Alternating current

Both direct and alternating current

Three-phase alternating current

Earth (ground) terminal

Protective earth (ground) terminal

Frame or chassis terminal

Terminal is at earth potential. Used for measurement and control circuits designed to be
operated with one terminal at earth potential.

Terminal for Neutral conductor on permanently installed equipment

WARNING

Caution

Terminal for Line conductor on permanently installed equipment

On (supply)

Off (supply)

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

In position of a bi-stable push control

Out position of a bi-stable push control

Caution, risk of electric shock

Caution, hot surface

Caution (refer to accompanying documents)

The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like,
which, if not correctly performed or adhered to, could result in personal injury. Do not proceed
beyond a WARNING sign until the indicated conditions are fully understood and met.

The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like,
which, if not correctly performed or adhered to, could result in damage to or destruction of part
or all of the product. Do not proceed beyond a CAUTION sign until the indicated conditions are
fully understood and met.

4

Declaration Page

DECLARATION OF CONFORMITY

according to ISO/IEC Guide 22 and EN 45014

Manufacturer's Name: Hewlett-Packard Company

Manufacturer's Address: 150 Green Pond Road

Rockaway, New Jersey 07866
U.S.A.

declares that the Product

Product Name: a) Dynamic Measurement DC Source

b) System DC Power Supply

Model Number: a) HP 66332A

b) HP 6631B, 6632B, 6633B, 6634B

conforms to the following Product Specifications:

Safety: IEC 1010-1:1990+A1(1992) / EN 61010-1:1993

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.

New Jersey November 1997 ______
Location Date Bruce Krueger / Quality Manager

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

5

Acoustic Noise Information

Herstellerbescheinigung

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

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

Manufacturer's Declaration

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

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

Printing History

The edition and current revision of this manual are indicated below. Reprints of this manual
containing minor corrections and updates may have the same printing date. Revised editions are
identified by a new printing date. A revised edition incorporates all new or corrected material since
the previous printing date.

Changes to the manual occurring between revisions are covered by change sheets shipped with the
manual. In some cases, the manual change applies only to specific instruments. Instructions
provided on the change sheet will indicate if a particular change applies only to certain instruments.

This document contains proprietary information protected by copyright. All rights are reserved.
No part of this document may be photocopied, reproduced, or translated into another language
without the prior consent of Hewlett-Packard Company. The information contained in this
document is subject to change without notice.

 Copyright 1997 Hewlett-Packard Company Edition 1 __________November, 1997

6

Table of Contents

Warranty Information 2
Safety Summary 3
Acoustic Noise Information 6
Printing History 6
Table of Contents 7

QUICK REFERENCE 9

HP 66332A Dynamic Measurement DC Source and
HP 6611C-6614C System DC Power Supply 9
The Front Panel - At a Glance 10
Front Panel Number Entry 11
Front Panel Annunciators 12
Immediate Action Keys 12
Front Panel Menus - At a Glance 13
SCPI Programming Commands - At a Glance 14
The Rear Panel - At a Glance 15

GENERAL INFORMATION 17

Document Orientation 17
Safety Considerations 18
Options and Accessories 18
Description 19

Capabilities 19
Front Panel Controls 19
Remote Programming 19
Output Characteristic 20

INSTALLATION 21

Inspection 21

Damage 21
Packaging Material 21
Items Supplied 21
Cleaning 21

Location 22

Bench Operation 22
Rack Mounting 22

Input Connections 23

Connect the Power Cord 23

Output Connections 23

Wire Considerations 23
Current Ratings 23
Voltage Drops 24
Multiple Load Connections 24

Remote Sense Connections 24

Sense Leads 25
Stability 26

OVP Considerations 26
Fast/Normal Operation 27

Inductive Loading 27
Capacitive Loading 27

INH/FLT Connections 27
Controller Connections 30

HP-IB Interface 30
RS-232 Interface 30

7

TURN-ON CHECKOUT 31

Introduction 31
Using the Keypad 31
Checkout Procedure 32
In Case of Trouble 34

Error Messages 34
Line Fuse 34

FRONT PANEL OPERATION 35

Introduction 35
Front Panel Description 35
System Keys 37
Function Keys 38

Immediate Action Keys 38
Scrolling Keys 38
Metering Keys 39
Output Control Keys 40

Entry Keys 41
Examples of Front Panel Programming 42

1 - Setting the Output Voltage and Current 42
2 - Querying and Clearing Output Protection 43
3 - Making Front Panel Measurements 43
4 - Programming the Digital Output Port 45
5 - Programming the Output Relay (option 760 only) 46
6 - Setting the HP-IB Address and RS-232 Parameters 46
7 - Saving and Recalling Operating States 47

SPECIFICATIONS 49

Specifications 49
Supplemental Characteristics 50

VERIFICATION AND CALIBRATION 53

Introduction 53

Equipment Required 53
Test Setup 53

Performing the Verification Tests 54

Turn-On Checkout 55
Voltage Programming and Measurement Accuracy 55
Current Programming and Measurement Accuracy 55

Performing the Calibration Procedure 59

Front Panel Calibration Menu 59
Front Panel Calibration 60

Calibration Error Messages 62
Changing the Calibration Password 63
Calibration Over the HP-IB 63

ERROR MESSAGES 65
LINE VOLTAGE CONVERSION 69

Open the Unit 69
Configure the Power Transformer 69
Install the Correct Line Fuse 70
Close the Unit 70

INDEX 71

8

1

Quick Reference

HP 66332A Dynamic Measurement DC Source and
HP 6631B/6632B/6633B/6634B System DC Power
Supplies

The HP 66332A is a 100 Watt, high performance dc power supply that provides dynamic
measurement and analysis of voltage and current waveforms. It is designed to simplify the testing
of digital cellular and mobile phones. For example, data acquired using its dynamic measurement
capability can be used in determining the battery operating time of digital wireless communications
products.

The HP 6631B/6632B/6633B/6634B are 100 Watt, high performance dc power supplies with
output current measurement capability in the microampere range. They are well suited for testing
portable battery-powered products.

Additionally, the combination of bench-top and system features in these dc sources provide
versatile solutions for your design and test requirements.

Convenient bench-top features

♦ Up to 100 Watts output power
♦ Easy to use knob for voltage and current settings
♦ Highly visible vacuum-fluorescent front panel display
♦ Excellent load and line regulation; low ripple and noise
♦ Measurement capability down to microampere levels
♦ Current sinking up to the maximum rated output current
♦ Instrument state storage
♦ Portable case

Flexible system features

♦ HP-IB (IEEE-488) and RS-232 interfaces are standard
♦ SCPI (Standard Commands for Programmable Instruments) compatibility
♦ Triggered acquisition of digitized output current and voltage waveforms (HP 66332A only)
♦ I/O setup easily done from the front panel

9

1 – Quick Reference

The Front Panel - At a Glance

j14-character

display shows output
measurements and
programmed values.

1

kAnnunciators

indicate operating
modes and status
conditions.

2 3

lRotary control

sets voltage, current,
and menu parameters.

Use and
to set the resolution;
then adjust the value
with the knob.

âá

mOptional front panel

output connectors.

4

5

nTurns the dc source

on and off.

o System keys:

♦ return to Local

mode

♦ set the HP-IB

address

♦ set the RS-232

interface

♦ display SCPI

error codes

♦ save and recall

instrument states.

6

7

p Function keys:

♦ enable/disable

output

♦ select metering

functions

♦ program voltage

and current

♦ set and clear

protection
functions

♦ and

scroll through the
front panel menu
commands.

•‚

8

qEntry keys:

♦ enter values
♦ increment or

decrement values

♦ and

select front panel
menu parameters.

á

♦ and

select a digit in
the numeric entry
field.

ãä

â

10

1 – Quick Reference

Front Panel Number Entry

Enter numbers from the front panel using one of the following methods:

Use the arrow keys and knob to change voltage or current settings

NOTE The output must be ON to see the displayed values change in Meter mode.

Use the Function keys and knob to change the displayed settings

Use the Arrow keys to edit individual digits in the displayed setting

Increments the flashing digit

Decrements the flashing digit

Moves the flashing digit to the right

Moves the flashing digit to the left

Enters the value when editing is complete

Use the Function keys and Entry keys to enter a new value

NOTE If you make a mistake, use the Backspace key to delete the number, or press the

Meter key to return to meter mode.

11

1 – Quick Reference

On/Off

Front Panel Annunciators

CV
CC
Unr
Dis

OCP

Prot

Cal

Shift
Rmt

Addr
Err

The output is operating in constant voltage mode.
The output is operating in constant current mode.
The output is unregulated.
The output is OFF. Press the Output On/Off key to turn the

output on.
The over-current protection state is ON. Press the OCP key to

turn over-current protection off.
Indicates that the output has been disabled by one of the

protection features. Press the Prot Clear key to clear the
protection condition.

Calibration mode is ON. Scroll to the Cal Off command and
press the Enter key to exit the calibration mode.

The Shift key has been pressed.
The selected Remote programming interface (either HP-IB or

RS-232) is active. Press the Local key to return the unit to
front panel control.

The interface is addressed to talk or listen.
There is an error in the SCPI error queue. Press the Error key

to view the error code.

SRQ

The interface is requesting service.

Immediate Action Keys

Output

Local

Shift

12

Prot ClrShift

OCP

A toggle switch that turns the output of the dc source on
or off.

Activates front panel control when the unit is in remote
mode (unless a Lockout command is in effect).

Resets the protection circuit and allows the unit to return
to its last programmed state.

A toggle switch that enables or disables overcurrent
protection.

Front Panel Menus - At a Glance

Address

Recall

Voltage

Meter

ADDRESS 7 Sets the HP-IB Address

‚
‚
‚
‚
‚

INTF HPIB Selects an interface (HPIB or RS232)
BAUDRATE 300 Selects baud rate (300, 600, 1200, 2400, 4800, 9600)
PARITY NONE Selects message parity (NONE, EVEN, ODD, MARK, SPACE)
FLOW NONE Selects flow control (XON-XOFF, RTS-CTS, DTR-DSR, NONE)
LANG SCPI Selects language (SCPI or COMP)

*RCL 0 Recalls instrument state

1 – Quick Reference

Meter

Current
Protect

Output

SaveShift
ErrorShift

*SAV 0 Saves present instrument state
ERROR 0 Displays errors in SCPI error queue

12.000V 0.204A Measures output voltage and current

‚
‚
‚
‚
‚
‚
‚
‚
‚
‚

12.500V MAX Measures peak output voltage

1.000V MIN Measures minimum output voltage

12.330V HIGH Measures the high level of a voltage pulse waveform

0.080V LOW Measures the low level of a voltage pulse waveform

12.000V RMS Measures rms voltage

0.350A MAX Measures peak output current

0.050A MIN Measures minimum output current

0.400A HIGH Measures the high level of a current pulse waveform

0.012A LOW Measures the low level of a current pulse waveform

0.210A RMS Measures rms current

1

1

1

1

1

1

1

1

1

1

VOLT 20.000 Sets the output voltage
CURR 2.000 Sets the output current
OC -- -- -- -- Protection status (example shows overcurrent tripped)
*RST Places the dc source in the factory-default state

‚
‚
‚
‚
‚
‚
‚
‚
‚

PON:STATE RST Select the power-on state command (RST or RCL0)
PROT:DLY 0.08 Sets the output protection delay in seconds
RI LATCHING Sets the remote inhibit mode (LATCHING, LIVE, or OFF)
DFI OFF Sets the discrete fault indicator state (ON or OFF)
DFI:SOUR OFF Selects the DFI source (QUES, OPER, ESB, RQS, or OFF)
PORT RIDFI Sets the output port functions (RIDFI or DIGIO)
DIGIO 7 Sets and reads the I/O port value (0 through 7)
RELAY ON Sets the output relay state (ON or OFF)
RELAY NORM Sets the output relay polarity (NORM or REV)

2

2

Shift
Shift Input

Use and to select menu parameters. Use to exit any menu and return to metering mode.

1

Not available on HP 6631B - 6634B or in Compatibility mode. 2Not available on HP 6631B.

OV

‚

CalShift

VOLT:PROT 22 Sets overvoltage protection level
CURR:RANG HIGH Sets current range (HIGH, LOW, or AUTO)

CURR:DET ACDC Sets current measurement detector (ACDC or DC)
CAL ON Accesses calibration menu (See User’s Guide).

ãä

1

13

1 – Quick Reference

SCPI Programming Commands - At a Glance

NOTE Most [optional] commands have been omitted for clarity. Refer to the

Programming Guide for a complete description of all programming commands.

ABORt SENSe
CALibrate

:CURRent [:POSitive] :DETector ACDC | DC

:NEGative :FUNCtion “VOLT” | “CURR”
:MEASure :LOWRange :SWEep :OFFSet :POINts <n>

1

:AC
:DATA <n> :TINTerval <n>
:LEVel P1 | P2 | P3 | P4 [SOURce:] CURRent <n>
:PASSword <n> :TRIGgered <n>
:SAVE :PROTection :STATe <bool>
:STATe <bool> [, <n>] DIGital :DATA <n>
:VOLTage :PROTection :FUNCtion RIDF | DIG

DISPlay

<bool> :TRIGgered <n>
:MODE NORMal | TEXT :PROTection <n>
:TEXT <display_string> :ALC :BANDwidth? | :BWIDth?

INITiate STATus

:SEQuence[1|21] :PRESet
:NAME TRANsient | ACQuire

1

:CONTinuous :SEQuence[1], <bool> :CONDition?

:NAME TRANsient, <bool> :ENABle <n>

MEASure | FETCh

:ARRay :CURRent?

:VOLTage?

[:CURRent][:DC]?

1

:ACDC?

1

:HIGH?

1

:LOW?

1

:MAX?

1

:MIN?

:VOLTage [:DC]?

1

:ACDC?

1

:HIGH?

1

:LOW?

1

:MAX?

1

:MIN?

1
1
2

2

OUTPut

<bool> [,NORelay] :COUNt :CURRent <n>
:DFI <bool> :VOLTage <n>
:SOURce QUES | OPER | ESB | RQS | OFF :HYSTeresis:CURRent <n>
:PON :STATe RST | RCL0 :VOLTage <n>
:PROTection :CLEar :LEVel :CURRent <n>

:DELay <n> :VOLTage <n>

:RELay [:STATe] <bool>

:POLarity NORM | REV

3

3

:RI :MODE LATCHing | LIVE | OFF :SOURce BUS | INTernal

1

Not available on HP 6631B - 6634B :SOURce BUS

2

Fetch commands not available on HP 6631B – 6634B :SEQuence1 :DEFine TRANsient

3

Not available on HP 6631B :SEQuence2 :DEFine ACQuire

:CURRent :RANGe <n>

:POINts <n>

VOLTage <n>

:OPERation [:EVENt]?

:NTRansition <n>
:PTRansition <n>

:QUEStionable [:EVENt]?

:CONDition?
:ENABle <n>
:NTRansition <n>
:PTRansition <n>

SYSTem

:ERRor?
:LANGuage SCPI | COMPatibility
:VERSion?
:LOCal
:REMote
:RWLock

TRIGger

:SEQuence 2 | :ACQuire [:IMMediate]

:SLOPe :CURRent POS | NEG | EITH

:VOLTage POS | NEG | EITH

[:SEQuence1 | :TRANsient][:IMMediate]

1

1

1

1

1

1

1

1

1

1

1

1

1

1

14

The Rear Panel - At a Glance

1 – Quick Reference

jHP-IB (IEEE-488)

interface connector

kRS-232 interface

connector

4

5

lINH/FLT (remote

INHibit / internal
FauLT) connector.
Connector plug is
removable.

3

2

mOutput and Remote

sense terminal block.

1

6

7

nFast/Normal switch oFuse holder pPower cord

connector (IEC 320)

Use the front panel Address menu to

♦ Select the HP-IB or RS-232 interface (see chapter 4 in User’s Guide)
♦ Select the HP-IB bus address (see chapter 4 in User’s Guide)
♦ Configure the RS-232 interface (see chapter 4 in User’s Guide)

15

2

General Information

Document Orientation

This manual describes the operation of the HP Model 66332A Dynamic Measurement DC Source
and the HP Model 6631B/6632B/6633B/6634B System DC Power Supply. Unless otherwise
noted, both units will be referred to by the description "dc source" throughout this manual. The
following documents are shipped with your dc source:

♦ a User's Guide (this document), contains installation, checkout, and front panel information
♦ a Programming Guide, contains detailed HP-IB programming information
♦ an HP VXIplug&play instrument driver, for Windows 95 and Windows NT 4.0

The following Getting Started Map will help you find the information you need to complete the
specific task that you want to accomplish. Refer to the table of contents or index of each guide for
a complete list of the information contained within.

Getting Started Map

Task Where to find information

Installing the unit

Line voltage connections
Computer connections
Load connections

Checking out the unit

Verifying proper operation
Using the front panel
Calibrating the unit

Using the front panel

Front panel keys
Front panel examples

Using the programming interface

HP-IB interface
RS-232 interface

Programming the unit using SCPI (and Compatibility)
commands

SCPI commands
SCPI programming examples
Compatibility language

Programming the unit using the HP VXIplug&play
instrument driver

Installing the instrument driver
Instrument driver functions
C/C++ example programs
Visual BASIC example programs
LabVIEW example programs
HP VEE example programs

User’s Guide

User’s Guide

User’s Guide

User’s Guide
Programming Guide

Programming Guide

HP VXIplug&play installation sheet
and on-line help

NOTE:
The driver must be installed on your computer to
access the on-line information.

Drivers for HP-UX are available on the web at
www.hp.com/go/power

17

2 – General Information

Safety Considerations

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

Options and Accessories

Table 2-1. Options

Option Description

100
220
230
020 Front panel output binding posts
760 Isolation and polarity reversal relays (not available on HP 6631B)

1CM Rack mount kit (HP p/n 5062-3974)

1CP Rack mount kit with handles (HP p/n 5062-3975)

1

Support rails are required when rack mounting units. Use E3663A support rails for HP rack cabinets, and

E3664A for non-HP rack cabinets.

910 Service manual with extra operating manuals

87−106 Vac, 47−63 Hz
191−233 Vac, 47−63 Hz
207−253 Vac, 47−63 Hz

Accessory Rack slide kit )HP p/n 1494-0060)

Table 2-2. Accessories

Item HP Part Number

HP-IB cables

1.0 meter (3.3 ft) 10833A

2.0 meters (6.6 ft) 10833B

4.0 meters (13.2 ft) 10833C

0.5 meters (1.6 ft) 10833D

RS-232 cable 34398A

(9-pin F to 9-pin F, 2.5 meter, null modem/printer cable

with one 9-pin M to 25-pin F adapter
RS-232 adapter kit (contains 4 adapters) 34399A

9-pin M to 25-pin M for pc or printer
9-pin M to 25-pin M for pc or printer
9-pin M to 25-pin M for modem
9-pin M to 9-pin M for modem

18

2 – General Information

Description

Both the HP 66332A Dynamic Measurement DC Source and the HP 6631B/6632B/6633B/6634B
System DC Power Supply combine two instruments in one unit. It includes a dc source, which
produces dc output with programmable voltage and current amplitude, and a highly accurate
voltage and current meter, with the capability to measure very low-level currents. Additionally,
the HP 66332A Dynamic Measurement DC Source has the ability to measure and characterize
output voltage and current of pulse or ac waveforms.

Capabilities

♦ Output Voltage and Current control with 12-bit programming resolution
♦ Extensive measurement capability:

dc voltage and current.
rms and peak voltage and current (HP 66332A only).
16-bit measurement resolution (low range accurate down to 2 microamperes).
Triggered acquisition of digitized current and voltage waveforms (HP 66332A

only).

♦ Front panel control with 14-character vacuum fluorescent display, keypad, and rotary

control for voltage and current settings.

♦ Built-in HP-IB and RS-232 interface programming with SCPI command language.
♦ Non-volatile state storage and recall.
♦ Over-voltage, over-current, over-temperature, and RI/DFI protection features.
♦ Extensive selftest, status reporting, and software calibration.

Front Panel Controls

The front panel has both rotary (RPG) and keypad controls for setting the output voltage and
current. The panel display provides digital readouts of a number of output measurements.
Annunciators display the operating status of the dc source. System keys let you perform system
functions such as setting the HP-IB address and recalling operating states. Front panel Function
keys access the dc source function menus. Front panel Entry keys let you select and enter
parameter values. Refer to chapter 5 for a complete description of the front panel controls.

Remote Programming

NOTE: When shipped, HP 6631B/6632B/6633B/6634B units are set to the

Compatibility programming language; HP 66332A units are set to the SCPI
programming language.
To change the programming language from Compatibility to SCPI, press the
front panel
select SCPI, then press
your dc source for further information about remote programming.

The dc source may be remotely programmed via the HP-IB bus and/or from an RS-232 serial
port. HP-IB programming is with SCPI commands (Standard Commands for Programmable
Instruments), which make the dc source programs compatible with those of other HP-IB
instruments. Compatibility commands are also included to make the dc source compatible with

Address key, use ô to scroll to the LANG command, press

Enter. Refer to the Programming Guide supplied with

Ì

to

19

2 – General Information

the HP 6632A, 6633A, and 6634A Series dc power supplies (refer to appendix D in the the
Programming Guide). Dc source status registers allow remote monitoring of a wide variety of dc
source operating conditions.

Output Characteristic

The dc source’s output characteristic is shown in the following figure. The output of the dc
source may be adjusted to any value within the boundaries shown.

Output

Voltage

Vmax

VSET

1

-

-Imax

0

CV operating line

2

Imax

ISET-ISET

CC operating line

+

Output

Current

Figure 2-1. Dc Source Output Characteristic

The dc source can operate in either constant voltage (CV) or constant current (CC) over the rated
output voltage and current. Although the dc source can operate in either mode, it is designed as a
constant voltage source. This means that the unit turns on in constant voltage mode with the
output voltage rising to its Vset value. There is no command for constant current operation. The
only way to turn the unit on in constant current mode is by placing a short across the output and
then enabling or turning the output on.

Note that the dc source cannot be programmed to operate in a specific mode. After initial turn­on, the operating mode of the unit will be determined by the voltage setting, the current setting,
and the load resistance. In figure 2-1, operating point 1 is defined by the load line traversing the
positive operating quadrant in the constant voltage region. Operating point 2 is defined by the
load line traversing the positive operating quadrant in the constant current region.

Figure 2-1 also shows a single range − two quadrant capability. This means that the dc source is
capable of sourcing as well as sinking current over the output voltage range from zero volts to the
rated maximum. The negative quadrant is identical to the positive quadrant. However, the
negative current cannot be set independently; it tracks the value programmed for the positive
current. Thus, if the positive current is set to 1 A, the negative current is also set to 1 A.

NOTE: If you attempt to operate the dc source beyond its output ratings, the output of

the unit will become unregulated. This is indicated by the UNR annunciator on
the front panel. The output may also become unregulated if the ac input voltage
drops below the minimum rating specified in Appendix A.

Appendix A documents the dc source’s specifications and supplemental characteristics.

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3

Installation

Inspection

Damage

When you receive your dc source, inspect it for any obvious damage that may have occurred
during shipment. If there is damage, notify the shipping carrier and the nearest HP Sales and
Support Office immediately. The list of HP Sales and Support Offices is at the back of this guide.
Warranty information is printed in the front of this guide.

Packaging Material

Until you have checked out the dc source, save the shipping carton and packing materials in case
the unit has to be returned. If you return the dc source for service, attach a tag identifying the
model number and the owner. Also include a brief description of the problem.

Items Supplied

The following user-replaceable items are included with your dc source. Some of these items are
installed in the unit.

Table 3-1. Items Supplied

Item Part Number Description

Power Cord contact nearest

HP Sales and

Support Office
Digital connector 1252-1488A 4-terminal digital plug that connects to the back of the unit.
Output cover 06624-20007 Safety cover that installs over the output screw terminals.
Terminal block screws N/A 6-32 X 3/8 inch screws.
Line Fuse 2110-0055

2110-0002
Feet 5041-8801 feet for bench mounting
User's Guide 5962-8196 Contains installation, checkout, and front panel information.
Programming Guide 5962-8198 Contains detailed HP-IB programming information.

A power cord appropriate for your location.

4 A for 100/120 Vac operation
2 A for 220/230 Vac operation

Cleaning

Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not
attempt to clean internally.

WARNING: To prevent electric shock, unplug the unit before cleaning.

21

3 - Installation

Location

The outline diagram in figure 3-1 gives the dimensions of your dc source. The dc source must be
installed in a location that allows sufficient space at the sides and back of the unit for adequate air
circulation (see Bench Operation).

Bench Operation

A fan cools the dc source by drawing air in through the sides and exhausting it out the back.
Minimum clearances for bench operation are 1 inch (25 mm) along the sides. Do not block the fan

exhaust at the rear of the unit.

Rack Mounting

The dc source can be mounted in a standard 19-inch rack panel or cabinet. Table 2-1 documents
the HP part numbers for the various rack mounting options that are available for the dc source.
Installation instructions are included with each rack mount option.

NOTE: Support rails or an instrument shelf is required when rack mounting units.

22

Figure 3-1. Outline Diagram

Installation - 3

Input Connections

Connect the Power Cord

1. Unscrew the line fuse cap from the rear panel and verify that the fuse rating matches what is

specified on the FUSES label on the rear panel. Reinstall the fuse. (See table 3-1 for fuse part
numbers.)

2. Connect the power cord to the IEC 320 connector on the rear of the unit. If the wrong power

cord was shipped with your unit, contact your nearest HP Sales and Support Office (refer to
the list at the back of this guide) to obtain the correct cord.

Output Connections

The output terminal block has connections for the + and − output, the + and − sense inputs, and an
earth ground terminal. The terminal block screws are 6-32 X 3/8 inch. Remove the safety cover by
inserting a flat bladed screwdriver in the opening on the left side of the cover and pushing the
locking tab to the left. This will release the cover.

Optional front panel binding posts are available to connect load wires for bench operation. The
front panel binding posts are paralleled with the rear panel + and − connections. Before using the

front panel binding posts, make sure that the output terminals are jumpered for local sensing.

NOTE: Front panel binding posts are provided for convenience. Only the rear panel

terminals are optimized for noise, regulation, and transient response as
documented in Appendix A.

Wire Considerations

To minimize the possibility of instability on the output,

♦ keep load leads as short as possible
♦ bundle or twist the leads tightly together to minimize inductance

Current Ratings

Fire Hazard To satisfy safety requirements, load wires must be large enough not to overheat

when carrying the maximum short-circuit current of the dc source. If there is more
than one load, then any pair of load wires must be capable of safely carrying the
full-rated current of the dc source.

The following table lists the characteristics of AWG (American Wire Gage) copper wire.

Table 3-2. Ampacity and Resistance of Stranded Copper Conductors

AWG No. Ampacity (in free air) Resistance (at 20 deg. C)

Ω/m Ω/ft

20 8.33 0.0345 0.01054
18 15.4 0.0217 0.00663
16 19.4 0.0137 0.00417
14 31.2 0.0086 0.00262
12 40 0.0054 0.00165

23