HP E1328A Service Manual

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Contents

Edition 2

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Chapter 1. General Informa tio n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

DAC Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

DAC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

DAC Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

DAC Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Chapter 2. Ins tallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Preparation for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Shipping Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Chapter 3. Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

D/A Converter Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Operator’s Chec k . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Self-Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Example: D/A Converter Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Chapter 4. Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Test Conditions / Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Performance Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Verification Test Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Function al Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

DAC Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Voltage Compliance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Test Procedure (Positive Voltage Compliance) . . . . . . . . . . . . . . . . . . . 22

Test Procedure (Negative Voltage Compliance) . . . . . . . . . . . . . . . . . . . . 23

Example: Positive Voltage Compliance . . . . . . . . . . . . . . . . . . . . . . . . 23

Current Compliance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Test Procedure (Positive Current Compliance) . . . . . . . . . . . . . . . . . . . . 26

Test Procedure (Negative Current Compliance) . . . . . . . . . . . . . . . . . . . . 26

Example: Positive Current Compliance . . . . . . . . . . . . . . . . . . . . . . . . 27

Operatio n Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Performance Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Voltage Accuracy Measurements Test . . . . . . . . . . . . . . . . . . . . . . . . . 29

HP E1328A Service Manual Contents 1

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Counter Accuracy Measurements Test . . . . . . . . . . . . . . . . . . . . . . . . . 31

Performance Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Chapter 5. Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Voltage Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Equipment Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Adjustment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Example: Voltage Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Current Ad justments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Equipment Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Adjustment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Example: Current Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Chapter 6. Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Exchange Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Replaceabl e

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Chapter 7. Manual Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Chapter 8. Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Service Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Troubleshooting Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Identifyi ng the Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Testing the DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Repair / Maintenance Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

ESD Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Soldering Printed Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Post-Repair Safety Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Appendix A. Calculating D/A Converter Accuracy . . . . . . . . . . . . . . . . . . . . . . 55

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

DAC Accuracy Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

DC Voltage Accuracy Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

DC Current Accuracy Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

HP 3458A Measurement Uncertainty Calculations . . . . . . . . . . . . . . . . . . . . 57

Calculate DCV Measurement Uncertainty . . . . . . . . . . . . . . . . . . . . . . . 57

Calculate DCI Measurement Uncertainty . . . . . . . . . . . . . . . . . . . . . . . 57

Test Accuracy Ratio (T A R) Calculations . . . . . . . . . . . . . . . . . . . . . . . . 58

Appendix B. Verification Tests - C Programs . . . . . . . . . . . . . . . . . . . . . . . . . 61

Function al Verification Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Example: Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Example: Positive Voltage Compliance . . . . . . . . . . . . . . . . . . . . . . . . 62

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Example: Positive Current Compliance . . . . . . . . . . . . . . . . . . . . . . . . 63

Performance Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Example: Voltage Accuracy Measurements . . . . . . . . . . . . . . . . . . . . . . 65

Example: Current Accuracy Measurements . . . . . . . . . . . . . . . . . . . . . . 66

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Example: Voltage Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Example: Current Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

HP E1328A Service Manual Contents 3

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Notes

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Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the factory. Hewlett-P a ck a r d further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology (formerly Na-

tional Bureau of Standards), to the extent allowed by that organization’s calibration facility, and to the calibration facilities of other International Standards Organization members.

WARRANTY

CERTIFICATION

This Hewlett-Packard product is warrante d against defects in materials and workmanship for a period of three years from date of shipment. Duration and conditions of warranty for this product may be superseded when the product is integrated into (becomes a part of) other HP products. During the warranty period, Hewlett-Packard Company will, at its option, either repair or replace products which prove to be defective.

For warranty service or repair, this product must be returned to a service facility designated by Hewlett-Packard (HP). Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and taxes for products returned to HP from another country.

HP warrants that its software and firmware designated by HP for use with a product will execute its programming instruct ions when properly installed on that product. HP does not warrant that the operation of the product, or software, or firmware will be uninterrupted or error free.

LIMITATION OF WARRANTY

The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer, Buyer-supplied products or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation or maintenance.

The design and implementation of any circuit on this product is the sole responsibility of the Buyer. HP does not warrant the Buyer’s circuitry or

malfunctions of HP products that result from the Buyer’s circuitry. In addition, HP does not warrant any damage that occurs as a result of th e Buyer’s circuit or any defects that result from Buyer-supplied products.

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 BUYER’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.

NOTICE

This manual and any examples contained herein are proveded “as is” and are subj ect to change without notice. HEWLETT-PACKARD (HP) COMPANY MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MANUAL, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard Company shall not be liable for any errors or for incidental or consequential damages in connection with the furnishing, performance or use of this material. This document contains proprietary information which is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard Company. HP assumes no responsibility for the use or reliability of its software on equipment that is not furnished by HP.

Restricted Rights Legend

Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subdivision (b)(3)(ii) of the Rights in Technical Data and Computer Software clause at 52.227-7013. Hewlett-Packard Company; 3000 Hanover Street; Palo Alto, California 94304

Declaration of Conformity

According to ISO/IEC Guide 22 and EN 45014

The Hewlett-Packard Company declares that the HP E1328A conforms to the following Product Specifications.

Safety: IEC 1010-1 (1990) Incl. Amend 1 (1992)/EN61010 (1993)

EMC: CISPR 11:1990/EN 55011 (1991): Group1 Class A IEC 801-2:1991/EN 50082-1 (1992): 4kVCD, 8kVAD IEC 801-3:1984/EN 50082-1 (1992): 3 V/m IEC 801-4:1988/EN 50082-1 (1992): 1kV Power Line

Supplementary Information: The product herewith complies with the requirements of the low voltage Directive 73/23/EEC and the EMC Directive 89/336/EEX. Tested in a typi ca l co n f i g u r at io n in an H P C-size VXI mainf r ame.

Hewlett-Packard Company P.O. Box 301 815 14th Street S.W. Loveland, Colorado 80539 U.S.A.

CSA C22.2 #1010.1 (1992) UL 1244

Q.A. Manager June 1996

Page 6

The Printing History shown below lists all Editions and Updates of this manual and the printing date(s). The first printing of the manual is Edition 1. The Edition number increments by 1 whenever the manual is revised. Updates, which are issued between Editions, contain replacem en t pages to correct the current Edition of the manual. Updates are numbered sequentially starting with Update 1. When a new Edition is created, it contains all the Update information for the previous Edition. Each new Edition or Update also includes a revised copy of this printing history page. Many product updates or revisions do not require manual changes and, conversely, manual corrections may be done without accompanying product changes. Therefore, do not expect a one-to-one correspondence between product updates and manual updates.

Edition 1 (Part Number E1328-90010) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . June 1991

Edition 2 (Part Number E1328-90011) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . June 1996

Safety Symbols

Printing History

Instruction manual symbol affixed to product. Indicates

Caution information to avoid personal injury or damage to the

field wiring terminal that must be connected to earth ground before operating the equip-

ment—protects against elect rical shock in case of fault.

that the user must refer to the manual for specific Warning or

product.

Indicates the

Frame or chassis ground tercally connects to

WARNING

CAUTION

Indicates

minal—typi the equipment’s metal

frame. Alternating current (AC).

Direct current (DC).

hazardous voltages.

WARNINGS

The following general safety precautions must be observed during all phases of operation, service, and repair of this product. 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 product. Hewlett-Packard Company assumes no liability for the customer’s failure to comply with these requirements.

Ground the equipment: For Safety Class 1 equipment (equipment having a protective earth terminal), an uninterruptible safety earth ground

must be provided from the mains power source to the product input wiring terminals or supplied power cable.

DO NOT operate the product in an explosive atmosphere or in the presence of flammable gases or fumes.

For continued protection against fire, replace the line fuse(s) only with fuse(s) of the same voltage and current rating and type. DO NOT use repaired fuses or short-circuited fuse holders.

Keep away from live circuits: Operating personnel must not remove equipment covers or shields. Procedures involving the removal of covers or shields are for use by service-trained personnel only. Under certain conditions, dangerous voltages may exist even with the equipment switched off. To avoid dangerous electrical shock, DO NOT perform procedures involving cover or shield removal unless you are qualified to do so.

DO NOT operate damaged equipment: Whenever it is possible that the safety protection features built into this product have been impaired, either through physical damage, excessive moisture, or any other reason, REMOVE POWER and do not use the product until safe operation can be verified by service-trained personnel. If necessary, return the product to a Hewlett-Packard Sales and Service Office for service and repair to ensure that safety features are maintained.

DO NOT service or adjust alone: Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is pr esent.

DO NOT substitute parts or modify equipment: Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the product. Return the product to a Hewlett-Packard Sales and Service Office for service and repair to ensure that safety features are maintained.

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What’s in this Manual

Manual Overview

This manual shows how to service the HP E1328A 4-Channel D/A Converter. Additional manuals which may be required for servicing the D/A Converter include the HP E1328A User’s Manual which contains D/A Converter operation, installation, and configuration information, and the appropriate mainframe user’s

manual(s) for mainframe operation, installation and configuration information.

Manual Content

Chapter Title Content

General Information

Installation Procedures to install the D/A Converter, perform initial inspection,

Operating Instructions

Verification Tests

Adjustments Procedures to adjust the D/A Converter to within its rated

Replaceable Parts

Manual Changes

Service Procedures to aid in fault isolation and repair of the D/A Converter.

Calculating D/A Converter Accuracy

Provides a basic description, and lists available options and accessories. Also lists the tools and test equipment required for service.

prepare for use, and store and ship the D/A Converter.

Procedures to operate the D/A Converter and perform operator’s check.

Functional verification, operation verification, and performance verification tests to test the D/A Converter.

specifications. Lists part numbers for user replaceable parts in the D/A Converter.

Provides information on ordering spare parts and module exchange. Information to adapt this manual to instruments whose serial

numbers are lower than those listed on the title page.

Shows how D/A Converter accuracy, measurement uncertainty, and test accuracy ratios (TARs) are calculated.

Verification Tests - C Programs

Gives example C programs to implement the the verification tests and adjustments.

What’s in this Manual 7

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HP 75000 Series B Service Documentation

Suggested Sequence to Use Manuals

Manual Descriptions

Installation and Getting Started Guide. This manual contains step-by-step instructions for all aspects of plug-in module and mainframe installation. Introductory programming information and examples are also included.

Mainframe User’s Manual. This manual contains programming information for the mainframe, front panel operation information ( for the HP E1301A mainframe) , and genera l programming information for instruments installed in the main frame.

Plug-In Module User’s Manuals. These manuals contain plug-in module programming and configuration information. Each manual contains examples for the most-used module functions, and a complete SCPI command re fe re nc e fo r th e pl ug-in module.

Mainframe Service Manual. This manual contains service information for the mainframe. It contains information for ordering replaceable parts and exchanging assemblies. Information and procedures for performance verification, adjustment, preventive maintenance, troubleshooting, and repair are also included.

Plug-In Module Service Manuals. These manual s co nt ain pl ug -i n m od ul e se rv ic e in formation. Each m an u a l contains information for exchanging the module and/or ordering replaceable parts. Depending on the module, information and procedures for functional verification, operation verification, performance verification, adjustment, preventive maintenance, troubleshooting, and repair are also provided.

8 HP 75000 Series B Ser vi ce D ocu m en ta ti o n

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Chapter 1

General Information

Introduction This HP E1328A Service Manual contains information required to test,

adjust, troubleshoot, and repair the HP E1328A B-Size VXI 4-Channel D/A Converter (DAC). See the HP E1328A User’s Manual for additional information on the HP E1328A DAC. Figure 1-1 shows the HP E1328A DAC.

Figure 1-1. HP E1328A 4-Channel D/A Converter

Chapter 1 General Information 9

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Safety Considerations

This product is a Safety Class I instrument that is provided with a protective earth terminal when installed in the mainframe. The mainframe, DAC, and all related documentation should be reviewed for familiarization with safety markings and instructions before operation or service.

Refer to the WARNINGS page (page iii) in this manual for a summary of safety information. Safety information for preventive maintenance, testing, adjusting, and service follows and is also found throughout this manual.

Warnings and

Cautions

WARNING

This section contains WARNINGS which must be followed for your protection and CAUTIONS which must be followed to avoid damage to the equipment when performing instrument maintenance or repair.

SERVICE-TRAINED PERSONNEL ONLY. The information in this manual is for service-trained personnel who are familiar with electronic circuitry and are aware of the hazards involved. To avoid personal injury or damage to the instrument, do not perform procedures in this manual or do any servicing unless you are qualified to do so.

CHECK MAINFRAME POWER SETTINGS. Before applying power, verify that the mainframe setting matches the line voltage and the correct fuse is installed. An uninterruptible safety earth ground must be provided from the main power source to the mainframe input wiring terminals, power cord, or supplied power cord set.

GROUNDING REQUIREMENTS. Interruption of the protective (grounding) conductor (inside or outside the mainframe) or disconnecting the protective earth terminal will cause a potential shock hazard that could result in personal injury. (Grounding one conductor of a two-conductor outlet is not sufficient protection.)

IMPAIRED PROTECTION. Whenever it is likely that instrument protection has been impaired, the mainframe must be made inoperative and be secured against any unintended operation.

REMOVE POWER IF POSSIBLE. Some procedures in this manual may be performed with power supplied to the mainframe while protective covers are removed. Energy available at many points may, if contacted, result in personal injury. (If maintenance can be performed without power applied, the power should be removed.)

10 General Information Chapter 1

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USING AUTOTRANSFORMERS. If the mainframe is to be energized via an autotransformer (for voltage reduction) make sure the common terminal is connected to neutral (that is, the

grounded side of the main’s supply).

WARNING

CAUTION

CAPACITOR VOLTAGES. Capacitors inside the mainframe may remain charged even when the mainframe has been disconnected from its source of supply.

USE PROPER FUSES. For continued protection against fire hazard, replace the line fuse(s) only with fuses of the same current rating and type (such as normal blow, time delay, etc.). Do not use repaired fuses or short-circuited fuseholders.

MAXIMUM VOLTAGE. Maximum voltage that may be applied between any two terminals within the same channel is ± 15 Vdc. Do not

apply voltage between any pair of terminals if the D/A Converter is turned off.

STATIC ELECTRICITY. Static electricity is a major cause of component failure. To prevent damage to the electrical components in the DAC, observe anti-static techniques when removing a DAC from the mainframe or when working on the DAC. Also, when installing a DAC in a mainframe slot, be sure to tighten the front panel screws.

POWER-UP/DOWN OUTPUTS. At power-up or down, potentials up to 12V may appear across the channel outputs for up to 10 msec.

Chapter 1 General Information 11

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DAC Description

The HP E1328A DAC is an "instrument" in the slots of a VXIbus mainframe. As su ch, it is assigned an er ro r qu eue, input and ou tput buffers, status registers, and is allocated a portion of mainframe memory for reading storage.

NOTE

Instruments are based on the logical addresses of the plug-in modules. See the HP 75000 Series B Installation and Getting Started Guide to set the addresses to create an instrument.

There are two E1328A DAC functions (see Table 1-1):

• Isolated Voltage DACs

• Isolated Current DACs

Table 1-1. HP E1328A 4-Channel D/A Converter Functions

Function/ Feature

Voltage DAC

Chs Description

1,2,3,4

Output DC voltage up to ± 10.92 V independently on each channel. Can use remote voltage sensing w ith "no-fault" operation. Connect multiple channels in series to increase th e ou tp ut to ± 48 Vdc for a si ng le module. All four channels are independently isolated and may be floated up to 350 Vdc from ground. Each channel can be calibrated electronically to 24-hour specifications.

Current DAC

1,2,3,4

Output DC current up to ± 21.8 mA independentl y on each channel. Connect multiple channels in parallel to increase the outp ut to ± 96 mA for a single module. All four channels are independently isolated and may be floated up to 350 Vdc from ground. Each channel can be calibrat ed electronically to 24-hour specifications.

DAC Specifications DAC specifications are listed in Appendix A of the HP E1328A Users

Manual. These sp ec ific ai ti on s ar e th e pe rf or mance standards or lim its

against which the instrument may be tested.

12 General Information Chapter 1

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DAC Serial

Numbers

DACs covered by this manual are identified by a serial number prefix listed on the title page. Hewlett-Packard uses a two-part serial number in the form XXXXAYYYYY, where XXXX is the serial prefix, A is the country of origin (A = USA), and YYYYY is the serial suffix. The serial number suffix is assigned sequentially to each instrument.

If the serial num b er pre fi x of yo u r in st ru me n t is gre at er th a n th e on e li st ed on the title page , a M an ua l U pd at e (a s re qu ir ed ) w ill ex pl ain how to adapt this manual to your instrument. If the serial number prefix is lower than the one listed on the title page, information contained in Chapte r 7 - M an ua l Changes explains how to adapt this manual to your instrument.

DAC Options There are no electrical or mechanical options available for the HP E1328A

DAC. However, you can order Option 1BN which provides a MIL-STD-45662A Calibration Certificate, or Option 1BP which provides the Calibration Certificate and measurement data. Contact your nearest Hewlett-Packard Sales and Service Office for information on Options 1BN and 1BP.

Chapter 1 General Information 13

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Recommended Test Equipment

Table 1-2 lists the te st equipment recom m en ded for testing, adj us ti ng , and servicing the HP E1328A DAC. Essential requirements for each piece of test equipment are described in the Requirements column.

Table 1-2. Recommended Test Equipme nt

Instrument Requirements Recommended

Model

Controller, HP-IB HP-IB compatibility as def ined by IEEE

Standard 488-1978 and the identical ANSI Standard MC1.1: SH1, AH1, T2, TE0, L2, LE0, SR0, RL0, PP0, DC0, DT0, and C1, 2, 3, 4, 5

Mainframe Compatible with DAC HP E1300A, E1301A,

DC Standard Voltage Range: -20.0 V to +20.0 V Datron 4708 with

Digital Mult im et er

*F = Functional Verification Tests, O = Operation Verification Tests, P = Performance Verification Tests, A = Adjustments, T = Trou bl es hoooting

Voltage Range: ± 10 VDC Current Range: ± 20 mA DC Accuracy: ± (.015% reading + 1 mV)

± (.02% read ing + 1 µA)

HP 9000 Series 300 or IBM compatib le PC with HP BASIC

E1302A, or E1401B/T, E1421A (requires HP E1306A)

Option 10

HP 3458A multimeter

HP E1326B multimeter

Use*

A,F,O, P,T

F,O,P

A,F,O, P,T

14 General Information Chapter 1

Page 15

Chapter 2

Installation

Introduction This chapter provides information to install the HP E1328A D/A Converter,

including initial inspection, preparation for use, environment, storage and shipment.

Initial Inspection

WARNING

Preparation for Use

Inspect the shipping container for damage. If the shipping container or cushioning material is damaged, keep the container until the shipment contents have been checked and the instrument has been checked mechanically and electrically. See Chapter 1 (Figure 1-1) for shipment contents. See Chapter 4 for procedures to check electrical performance.

To avoid possible hazardous electrical shock, do not perform electrical tests if there are signs of shipping damage to any portion of the outer enclosure (covers, panels, etc.).

If the contents are incomplete, if there is mechanical damage or defect, or if the instrument does not pass the electrical performance tests, notify your nearest Hewlett-Packard Sales and Service Office. If the shipping container is damaged or the cushioning material shows signs of stress, notify the carrier as well as Hewlett-Packard, and keep the shipping materials for the

carrier’s inspection.

See Chapter 2 of the HP E1328A User’s Manual to prepare the HP E1328A D/A Converter for use. See the appropriate mainframe user’s manual(s) to prepare your mainframe. If your mainframe is not manufactured by Hewlett-Pack a rd , co ns ul t th e m an uf ac tu re r fo r a list of available manual(s).

Recommended operating environment for the HP E1328A D/A Converter is

C to +55oC with humidity <65% re la ti ve (0 oC to +40oC). The instrument

0 should be stored in a clean, dry environment. For storage and shipment, the temperature range is -40

C to +40oC).

Chapter 2 Installation 15

C to +75oC with humidity <65% relative humidity

Page 16

Shipping Guidelines

Follow the steps in Figure 2-1 to return the HP E1328A D/A Converter to a Hewlett-Packard Sales and Support Office or Service Center.

1 Prepare the D/A Converter

•

Remove user wiring from the module

•

Attach tag to module/pod that identifies

- Owner

- Model Number/Serial Number

- Service Required

•

Place tagged device in approved anti-static bag

2 Package the D/A Converter

•

Place packaged D/A Converter in shipping carton*

•

Place 75 to 100 mm (3 to 4 inches) of shockabsorbing material around the D/A Converter

•

Seal the shipping carton securely

•

Mark the shipping carton FRAGILE

3 Ship the D/A Converter to Hewlett-Packard

•

Place address label on shipping carton

•

Send carton to Hewlett-Packard

Figure 2-1. Packaging/Shipping Guidelines

* We recommend that you use the same shipping materials as those used in factory packaging (available from Hewlett-Packard). For

other (commercially-available) shipping materials, use a double wall-carton with minimum 2.4 MPa (350 psi) test.

16 Installation Chapter 2

Page 17

Chapter 3

Operating Instructions

Introduction This chapter lists operating information for the HP E1328A D/A Converter,

including:

• D/A Converter operation

• Operator’s check (s elf- te st )

D/A Converter Operation

Operator’s Check

CAUTION

See the HP E1328A 4-Channel D/A Converter User’s Manual for D/A Converter operation, including:

• Getting started

• Configuring the D/A Converter

• Using the D/A Converter

• Understanding the D/A Converter

• D/A Converter command reference

• D/A Converter specifications

• D/A Converter error messages

The Operator’s Check for the HP E1328A D/A Converter consists of sending the self-test (*TST?) command and checking the return. The operator’s check can be used at any time to verify the D/A Converter is connected properly and is responding to the self-test command. See Chapter 8 - Servic e for a list of D/A Converter self-test errors.

The *TST? command temporarily resets the D/A Converter (to 0 V or 0 A output) on each channel. Make sure any devices connected to the DAC will not be adversely affected before using *TST?.

As required, see the mainframe user’s manual for information on address selection. See the HP E1328A User’s Manual for info rmation on D/A

Converter SCPI commands.

Chapter 3 Operating Instructions 17

Page 18

Self-Test Procedure 1. Verify the D/A Converter is properly installed in the mainframe and

the mainframe has passed its power-on sequence test. See the HP 75000 Series B System Installation and Getting Started Guide for information on mainframe power-on sequence tests.

2. Execute the D/A Converter self-test using the *TST? command (see

example following).

3. A "0" returned means no self-test failure, while "-330" returned

means a failure was detected. See Chapter 8 - Service for trouble shooting information (see NOTE following).

NOTE

Example: D/A

Converter Self-Test

Test failures can be caused by improper cabling, improper selection of the interface select code, primary, and/or secondary address setting. Verify proper connection and address selection before trouble shooting.

An example follows which uses an HP 9000 Series 300 computer with HP BASIC and a D/A Converter address of 70909.

10 OUTPUT 70909;"*TST?" Send the self-test command 20 ENTER 70909;A Enter self-test result 30 PRINT A 40 END

18 Operating Instructions Chapter 3

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Chapter 4

Verification Tests

Introduction The three levels o f te st p ro ce du re s de sc ri be d in this chapter are us ed to

verify that the HP E1328A D/A Converter (DAC):

• is fully functional (Functional Verification)

• meets selected testable specifications (Operation Verification)

• meets all testable specifications (Performance Verification)

WARNING

Test Conditions /

Procedures

Do not perform any of the following verification tests unless you are a qualified, service-trained person and have read the WARNINGS and CAUTIONS in Chapter 1.

For valid tests, all test equipment and the HP 3458A multimeter must have a one-hour warmup, the line voltage must be 115/230 Vac ± 10%, and HP

3458A ACAL must be performed no more than 24 hours before the tests. See Table 1-2, Recommended Test Equipment for test equipment requirements.

For best test accuracy, the ambient temperature of the test area should be

between 18°C and 28°C and stable to within ± 1°C. You should perform the Performance Verification tests at least once a year. For heavy use or severe operating environments, perform the tests more often.

The verification tests assume the person performing the tests understands how to operate the mainframe, the DAC and specified test equipment. The test procedures do not specify equipment settings for test equipment except in general terms. It is assumed a qualified, service-trained person will select and connect the cables, adapters, and probes required for the test.

Chapter 4 Verification Tests 19

Page 20

Performance Test

Record

Table 4-2, Performance Test Record for the HP E1328A DAC, at the end of this chapter, pro v ide s space to enter the res ul ts of ea ch Perf or mance Verification test and to compare the results with the upper and lower limits for the test. You can make a copy of this form, if desired.

NOTE

Verification Test

Examples

The upper and lo wer limi ts in th e Per fo rm a nc e Tes t Rec or d as su m e th e te st equipment used is calibrated and operating at peak performance. If this is not the case/ problems can occur.

For example, an un ca lib ra ted HP 34 5 8A mul tim eter ma y ca us e wh a t seem s to be an inaccurate measurement. This condition must be considered when observed measurements do not agree with the performance test limits.

The value in the "Measurement Uncertainty" column of Table 4-2 is derived from the specifications for the HP 3458A multimeter used for the test, and represents the expected accuracy of the HP 3458A. The value in the "Test Accuracy Ra tio (TA R) " col um n of Tab le 4-2 is th e ra ti o of DAC ac curacy

to HP 3458A measuremen t un cert aint y. If the TAR is ≤ 10:1, the ratio is rounded to the nearest inte ge r. If the TAR is ≥ 10:1, the TAR is shown as

>10:1.

Each Performance Verification Test includes an example program to perform the te st. Eac h ex am p le u se s ad dr es s 70 90 9 fo r th e D A C, an d an HP 9000 Series 200/300 computer running HP BASIC commands. You may need to change the DAC address and/or command syntax to perform the examples for your setup.

As required, see the mainframe user’s manual for information on address selection and cabling guidelines. See the HP E1328A User’s Manual for

information on Standard Commands for Programmable Instruments (SCPI commands) for the DAC.

20 Verification Tests Chapt er 4

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Functional Verification Tests

DAC Self-Test This test verifies the DAC is communicating with the mainframe, external

The functional verification tests for the HP E1328A DAC can be performed at any time to verify the DAC is functional and is communicating with the mainframe , external comp ut er and /or external ter m in al . The fun ct io nal tests for the HP E1328A DAC are:

• DAC Self-Test

• Voltage Compliance Tests (Optional)

• Current Compliance Tests (Optional)

controller, and/or external terminal by performing a self-test (*TST?

command). See "Operator’s Checks" in Chapter 3 for a description of the DAC self-test.

Voltage

Compliance Tests

These OPTIONAL tests measure the voltage compliance on each channel of the DAC.

Positive Voltage Compliance Tests

For positive voltage compliance tests, each channel to be tested is set for UNCALIBRATED MAX voltage output (+ 12V). A DC source is connected to V+ and S+ of the channel to be tested. The source is set to +5V and increased in +0.5V steps until the channel output (as measured with an HP 3458A multimeter) stops increasing. If the channel maximum

output is ≥ + 15V , th e te st pas se s.

Negative Voltage Compliance Tests

For negative voltage compliance tests, each channel to be tested is set for UNCALIBRATED MIN voltage output (-12V). A DC source is connected to V- and S- of the channel to be tested. The source is set to -5V and increased in -0.5V steps until the channel output (as measured with an HP

3458A multimeter) stops increasing. If the channel minimum output is ≤

-15V, the te st p as se s.

Equipment Setup Connect the DC source (Datron 4708 with Option 10) and HP 3458A

multimeter to Channel 1 as shown in Figure 4-1. (Be sure to set all three jumpers on the channel to the V position.) Set the DC source output to +5.0 V dc. Set the HP 3458A to DCV function and set NPLC 100.

Chapter 4 Verification Tests 21

Page 22

NOTE

For best measurement accuracy, perform an HP 3458A multimeter ACAL not more than 24 hours prior to these tests.

Figure4-1. Voltage Compliance Test Connections

Test Procedure

(Positive Voltage

Compliance)

1. Set three jumpers on each channel to the V position

2. Connect DC Source and HP 3458A to Channel 1 (see Figure 4-1 )

3. Set non-cal mode on Channel 1 with CAL1:STAT OFF

4. Set Channel 1 to max voltage output ( + 12V) with VOLT1 MAX

5. Set DC source to + 5V and measure channel output (in V)

6. Increase DC so ur ce out pu t by +0. 5 V an d m ea su re new ch an ne l ou tput (in V)

7. Repeat step 6 until channel output stops increasing. If the output voltage is ≥ + 15.0V when the output stops increasing, the test passes.

8. Repeat steps 2 through 7 for Channels 2, 3, and 4 (use CALchan: STAT OFF and VOLTchan MAX)

9. Remove power and disconnect test equipment

22 Verification Tests Chapt er 4

Page 23

Test Procedure

(Negative Voltage

Compliance)

1. Set three jumpers on each channel to the V position

2. Connect DC Source and HP 3458A to Channel 1 (see Figure 4-1 )

3. Set non-cal mode on Channel 1 with CAL1:STAT OFF

4. Set Channel 1 to min voltage output (-12V) with VOLT1 MIN

5. Set DC source to -5V and measure channel output (in V)

6. Increase DC source output by -0.5V and measure new channel output (in V)

7. Repeat step 6 until channel output stops increasing. If the output voltage is ≤ -15.0V when the output stops increasing, the test passes.

8. Repeat steps 2 through 7 for Channels 2, 3, and 4 (use CALchan: STAT OFF and VOLTchan MIN)

9. Remove power and disconnect test equipment

Example: Positive

Voltage Compliance

NOTE

This program checks the MEASURED voltage output from the DAC channel being tested. If the measured channel output is ≥ 15.0V when the

output stops increasing, the program generates a "test PASSED" indication. If the measured channel output is < 15.0V when the output stops increasing, the program generates a "test FAILED" indication.

To use this program for negative voltage compliance tests, change the indicated lines as shown:

50 OUTPUT 70909;"VOLT"&VAL$(Chan)&" MIN" 60 Source = -4.5 90 Source = Source-.5 180 IF Value <= -15 THEN Pass$ = "PASSED" 190 IF Value > -15 THEN Pass$ = "FAILED"

Chapter 4 Verification Tests 23

Page 24

10 ! Positive Voltage Compliance Tests 20 ! 30 FOR Chan = 1 TO 4 40 OUTPUT 70909;"CAL"&VAL$(Chan)&":STAT OFF" 50 OUTPUT 70909;"VOLT"&VAL$(Chan)&" MAX" 60 Source = 4.5 70 REPEAT 80 PRINT TABXY(1,1),"Voltage Compliance Tests on Channel";Chan 90 Source = Source + .5 100 Old_value = Value 110 PRINT TABXY(4,9),"Set source to ";Source;"Volts DC " 120 PRINT TABXY(4,10),"Measure channel output (in V) " 130 INPUT " Enter channel output (in V) ",Value 140 PRINT TABXY(4,5),"DC Source value = ";Source;"VDC " 150 PRINT TABXY(4,6),"Channel";Chan;"output = ";Value;"VDC " 160 Result = Value-Old _value 170 UNTIL Result = 0 180 IF Value >= 15 THEN Pass$ = "PASSED" 190 IF Value < 15 THEN Pass$ = "FAlLED" 200 CLEAR SCREEN 210 PRINT TABXY(1,8),"Maximum Channel";Chan;"output = ";Value;"Volts" 220 PRINT TABXY(1,9),"Test ";Pass$;" for Channel";Chan 230 DISP " Press Continue for next channel" 240 PAUSE 250 CLEAR SCREEN 260 NEXT Chan 270 END

Current

Compliance

Tests

These tests mea su re the cur ren t com p li an ce on ea ch cha nn el of th e D A C.

Positive Current Compliance Tests

For positive current compliance tests, each channel to be tested is set for UNCALIBRATED MAX current output (+24 mA). A DC source and HP 3458A are connected to the channel to be tested. The source is set to + 12V and increa se d in + 0.5 V step s unt il the cha nnel output decrea se s to 90% of the maximum current value (decreases to +21.6 mA). If the DC

SOURCE voltag e is ≥ + 13 V wh en the chan n el out pu t de crea se s to 90 % of maximum cu rr en t th e te st p as se s.

24 Verification Tests Chapt er 4

Page 25

Negative Current Compliance Tests

For negative current compliance tests each channel to be tested is set for UNCALIBRATED MIN current output (-24 mA). A DC source and HP 3458A are connected to the channel to be tested. The source is set to

-12V and increased in -0.5V steps until the channel output decreases to 90% of the maximum current value (decreases to -21.6 mA). If the DC SOURCE

voltage is ≤ -13V when the channel output decreases to 90% of maximum current, the test passes.

Equipment Setup Connect the DC source (Datron 4708 with Option 10) and HP 3458A

multimeter to Channel 1 as shown in Figure 4-2. (Be sure to set all three channel jumpers to the I position.) Then, set the DC source output to +12.0 Vdc. Set the HP 3458A to DCI function and set NPLC 100.

NOTE

For best measurement accuracy, perform an HP 3458A multimeter ACAL not more than 24 hours prior to these tests.

Figure 4-2. Current Compliance Test Connections

Chapter 4 Verification Tests 25

Page 26

Test Procedure

(Positive Current

Compliance)

1. Set three jum pe rs o n ea ch ch a nn el to the I position

2. Connect source and HP 3458A to Channel 1 (see Figure 4-2)

3. Set non-cal mode on Channel 1 with CAL1:STAT OFF

4. Set Channel 1 max output (+24 mA) with CURR1 MAX

5. Set DC source to + 12.0V and measure channel output (in mA)

6. Increase DC source output by +0.5V and measure channel output (in mA)

7. Repeat step 6 until channel output is 90% of max (21.6 mA). If the

SOURCE voltag e is ≥ 13.0V when the output decreases to 90% of max, the test passes.

8. Repeat steps 2 through 7 for Channels 2, 3, and 4. (Use CALchan:STAT OFF and CURRchan MAX.)

Test Procedure

(Negative Current

Compliance)

9. Remove power and disconnect test equipment

1. Set three jum pe rs o n ea ch ch a nn el to the I position

2. Connect source and HP 3458A to Channel 1 (see Figure 4-2)

3. Set non-cal mode on Channel 1 with CAL1:STAT OFF

4. Set Channel 1 min current output (-24 mA) with CURR1 MIN

5. Set DC source to -12.0V and measure channel output (in mA)

6. Increase DC source output by -0.5V and measure channel output (in mA)

7. Repeat step 6 until channel output is 90% of min (-21.6 mA). If the SOURCE voltag e is ≤ -13.0V when the output decreases to 90% of min, the

test passes.

8. Repeat steps 2 through 7 for Channels 2, 3, and 4 (use CAL chan:STAT OFF and CURR chan MIN)

26 Verification Tests Chapt er 4

Page 27

9. Remove power and disconnect test equipment

Example: Positive

Current Compliance

NOTE

This program checks the MEASURED current output from the DAC channel being tested. If the DC SOURCE voltage is ≥ 13.0V when the

output current drops to 90% of maximum current, the program generates a "test PASSED" indication. If the DC SOURCE voltage is < 13.0V when the output current drops to 90% of maximum current, the program generates a "test FAILED" indication.

To use this program for negative current compliance tests, change the indicated lines as shown:

50 OUTPUT 70909;"CURR"&VAL$(Chan)&" MIN" 60 Source = -11.5 90 Source = Source-.5 180 IF Source <= -13.0 THEN Tst$="PASSED" 190 IF Source > -13.0 THEN Tst$ ="FAILED"

10 ! Current Compliance Tests 20 ! 30 FOR Chan = 1 TO 4 40 OUTPUT 70909;"CAL"&VAL$(Chan)&":STAT OFF" 50 OUTPUT 70909;"CURR"&VAL$(Chan)&" MAX" 60 Source = 11.5 70 REPEAT 80 PRINT TABXY(1,1),"Current Compliance Tests on Channel";Chan 90 Source = Source + .5 100 PRINT TABXY(4,10),"Set DC source to ";Source;"Volts DC " 110 PRINT TABXY(4,11),"Measure channel output (in mA)" 120 INPUT " Enter channel output (in mA) ",Value 130 Result = ABS(100*Value/24.0) 140 PRINT TABXY(4,5),"DC Source value = ";Source;"VDC " 150 PRINT TABXY(4,6),"Channel";Chan;"output = ";Value;"mA" 160 PRINT TABXY(4,7),"Output = ";Result;"% of max value " 170 UNTIL Result <= 90.0 180 IF Source >= 13.0 THEN Tst$ = "PASSED" 190 IF Source < 13.0 THEN Tst$ = "FAILED" 200 CLEAR SCREEN 210 PRINT TABXY(4,14),"DC Source value for output 90% of max = ";Source;"VDC" 220 PRINT TABXY(4,15),"Test ";Tst$;" for Channel";Chan 230 NEXT Chan 240 END

Chapter 4 Verification Tests 27

Page 28

Operation Verification Tests

Operation verification tests objectives are to instill a high degree of confidence that the HP E1328A 4-Channel D/A Converter is meeting selected specifications from those listed in Appendix A - Specifications in the HP E1328A User’s Manual.

Operation verification tests can be used in applications such as incoming inspection and af te r HP E132 8A re pa ir. To pe rf or m o pe ratio n verif icat io n tests, do the parts of the performance verification tests shown in Table 4-1. See Performance Verification Tests for details on the test procedures.

NOTE

For best results, pe rfor m an ACAL on th e HP 3 45 8A mul tim et er n ot mo re than 24 hours prior to performing the operation verification tests.

If the operation verification test FAILS on any channel, you may want to perform the Voltage Adjustment and/or Current Adjustment procedures in Chapter 5 - Adjustments and then rerun the operation verification tests.

Table 4-1. HP E1328A DAC Operation Verification Tests

For this test: Make these measurements:

Voltage Accuracy -10V, 0V, +10V

Current Accuracy -20 mA, 0 mA, +20 mA

28 Verification Tests Chapt er 4

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Performance Verification Tests

Performance verification tests objectives are to instill a high degree of confidence that the HP E1328A 4-Channel D/A Converter (DAC) is meeting the specifications listed in Appendix A - Specifications of the HP E1328A User’s Manual. Performan ce ver if icat io n te st s ar e re qu ir ed whenever a calibration is required. The HP E1328A DAC performance verificatio n te st s ar e:

• Voltage Accuracy Measurements

• Current Accuracy Measurements

NOTE

Voltage Accuracy

Measurements Test

Equipment setup Connect the equipment as shown in Figure 4-3. Be sure the three jumpers in

For best results you should ACAL the HP 3458A multimeter not more than 24 hours prior to the tests. If a DAC channel does not pass the performance tests, you may want to do the Voltage Adjustment and/or Current Adjustment (see Chapter 5 - Adjustments) and then rerun the performance verification tests.

This test checks voltage output accuracy on Channels 1, 2, 3, and 4 of the DAC. The voltage output levels checked are: -10V, -8V, -5V, -2V, 0V, +2V, +5V, +8V, and +10V.

each DAC channel are set to the V (voltage) position. Then, set the HP 3458A to DCV function and set NPLC 100.

Figure 4-3. Voltage Accuracy Measurements Connections

Chapter 4 Verification Tests 29

Page 30

NOTE

The value of 1 kΩ in Figure 4-3 is the factory value used for original measurements. If you previously calibrated your DAC with a different

resistance value, use that resistance value rather than 1 kΩ .

Test Procedure 1. Set three jumpers on each channel to the V position

2. Connect HP 3458A and 1 kΩ resistor to Channel 1 (see Figure 4-3)

3. Set HP E1328A DAC to default with *RST

4. Set Channel 1 to calibrated mode with CAL1:STAT ON

5. Output -10V on Channel 1 with VOLT1 -10.0000

6. Measure Channel 1 output voltage with HP 3458A and compare

with limits in Table 4-2

7. Repeat steps 5 and 6 for -8V, -5V, -2V, 0V, +2V, +5V, +8V, and

+10V

Example: Voltage

Accuracy

Measurements

8. Repeat steps 2 through 7 for Cha nn el s 2, 3, an d 4 (u se

CALchan:STAT ON and VOLTchan value)

9. Remove power and disconnect test equipment

This program checks the MEASURED output voltage on each DAC channel and compares the result with the 1-year accuracy specifications for the DAC (see Appendix A - Calculating D/A Converter Accuracy for a discussion of DAC accuracy).

10 ! Voltage Accuracy Measurements Test 20 ! 30 OPTION BASE 1 40 DIM Volts(4,9) 50 DATA -10,-8,-5,-2,0,2,5,8,10 60 DATA -10,-8,-5,-2,0,2,5,8,10 70 DATA -10,-8,-5,-2,0,2,5,8,10 80 DATA -10,-8,-5,-2,0,2,5,8,10 90 READ Volts(*) 100 OUTPUT 70909;"*RST" 110 FOR Chan = 1 TO 4 120 FOR I = 1 TO 9 130 OUTPUT 70909;"VOLT"&VAL$(Chan)&" ";Volts(Chan,I) 140 PRINT TABXY(1,2),"Voltage Accuracy Measurements on Channel ";Chan

30 Verification Tests Chapt er 4

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150 PRINT TABXY(1,10),"New voltage output on Channel";Chan;" = ":Volts(Chan,I);"V " 160 PRINT 170 INPUT " Enter MEASURED voltage value (in V) ",Meas(Chan,I) 180 GOSUB Accuracy 190 Accuracy: ! 200 Acc(Chan,I) = .0035*ABS(Volts(Chan,I)) + .11334 210 Llim(Chan,I) = Volts(Chan,I) - Acc(Chan,I) 220 Ulim(Chan,I) = Volts(Chan,I) + Acc(Chan,I) 230 IF Meas(Chan,I) < Llim(Chan,I) OR Meas(Chan,I) > Ulim(Chan,I) THEN 240 PRINT TABXY(1,9),"Test FAILED on Channel";Chan;"for ";Volts(Chan,I);"V" 250 ELSE 260 PRINT TABXY(1,9),"Test PASSED on Channel";Chan;"for ";Volts(Chan,I);"V " 270 END IF 280 NEXT I 290 NEXT Chan 300 PRINT TABXY(1,18) ,"Voltage Accuracy Tests Complete" 310 END

Counter Accuracy

Measurements Test

Equipment Setup Connect the equipment as shown in Figure 4-4. Be sure the three jumpers

This test checks current output accuracy on Channels 1, 2, 3, and 4 of the DAC. The current output levels checked are: -20 mA, -16 mA, -10 mA, -4 mA, 0 mA, 4 mA, 10 mA, 16 mA, and 20 mA.

in each DAC chan ne l ar e se t to the I (cu rr en t) p os itio n. Th en , se t th e HP 3458A to DCI function and set NPLC 100.

Figure 4-4. Current Measurement Accuracy Connections

Chapter 4 Verification Tests 31

Page 32

NOTE

The value of 500 Ω in Figure 4-4 is the factory value used for original measurements. If you previously calibrated your DAC with a different

resistance value, use that resistance value rather than 500 Ω .

Test Procedure 1. Set three jumpe rs on ea ch ch a nn el to th e I po si tion

2. Connect HP 3458A and 500 Ω resistor to Channel 1 (see Figure 4-4)

3. Set HP E1328A DAC to default with *RST

4. Set Channel 1 to calibrated mode with CAL1:STAT ON

5. Output -20 mA on Channel 1 with CURR1 -.02000

6. Measure Channel 1 output current with HP 3458A and compare with

limits in Table 4-2

7. Repeat steps 5 and 6 for -16 mA, -10 mA, -4 mA, 0 mA, 4 mA, 10

mA., 16 mA, and 20 mA

Example: Current

Accuracy

Measurements

8. Repeat steps 2 through 7 for Channels 2, 3, and 4 (use CALchan:

STAT ON and CURRchan value)

9. Remove power and disconnect test equipment

This program checks the MEASURED output current on each DAC channel and compares the result with the 1-year accuracy specifications for the DAC (See Appendix A - Calculating D/A Converter Accuracy for a discussion of DAC accura cy ).

10 ! Current Accuracy Measurements Test 20 ! 30 OPTION BASE 1 40 DIM Amps(4,9) 50 DATA -.02,-.016,-.01,-.004,0,.004,.01,.016,.02 60 DATA -.02,-.016,-.01,-.004,0,.004,.01,.016,.02 70 DATA -.02,-.016,-.01,-.004,0,.004,.01,.016,.02 80 DATA -.02,-.016,-.01,-.004,0,.004,.01,.016,.02 90 READ Amps(*) 100 OUTPUT 70909;"*RST" 110 FOR Chan = 1 TO 4 120 FOR l=1 TO 9 130 OUTPUT 70909;"CURR"&VAL$(Chan)&" ";Amps(Chan,I) 140 PRINT TABXY(1,2)," Current Accuracy Measurements on Channel ";Chan

32 Verification Tests Chapt er 4

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150 PRINT TABXY(1,10),"New current output on Channel";Chan;" = ";Amps(Chan,I)*1.E + 3;"mA " 160 INPUT " Enter MEASURED current value (in mA) ",Meas(Chan,I) 170 GOSUB Accuracy 180 Accuracy: ! 190 Acc(Chan,I) = .0035*ABS(Amps(Chan,I)) + 2.2665E-4 200 Llim(Chan,I) = Amps(Chan,I) - Acc(Chan,I) 210 Ulim(Chan,I) = Amps(Chan,I) + Acc(Chan,I) 220 IF Meas(Chan,I)*1.E-3 < (Chan,I) OR Meas(Chan,I)*1.E-3 > Ulim(Chan,I) THEN 230 PRINT TABXY(1,9),"Test FAILED on Channel";Chan;"for ";Amps(Chan,I)*1.E + 3;"mA " 240 ELSE 250 PRINT TABXY(1,9),"Test PASSED on Channel";Chan;"for ";Amps(Chan,I)*1.E + 3;"mA " 260 END IF 270 NEXT I 280 NEXT Chan 290 PRINT TABXY(1,18),"Current Accuracy Tests Complete" 300 END

Performance Test Record

NOTE

Table 4-2, Performance Test Record for the HP E1328A DAC, can be used to record the res ul ts of ea ch Op erat io n V er ific at io n an d Per fo rma nc e Verification test for the HP E1328A DAC (this record can be copied if desired). The record includes the DAC upper and lower limits, HP 3458A measurement uncertainty, and the Test Accuracy Ratio (TAR) for the test.

The values for DAC accuracy, HP 3458A measurement uncertainty and TAR in Table 4-2 assume the following conditions. If your test conditions differ from thes e co nd it io ns , you will need to compu te the app ro pr ia te values.

• Calibration ON state (CAL x :STAT O N) fo r ea ch channel

• 1 kΩ load for voltage accuracy measurements

• 500 Ω load for current accuracy measurements

• Test temp ASSUMED to be ± 5° C different than cal temp

• 1-year specifications for DAC accuracy

• 1-year specifications for HP 3458A meas uncertainty

For the conditions listed, all Test Accuracy Ratios (TARs) exceed 4:1

Chapter 4 Verification Tests 33

Page 34

Table 4-2. Performance Test Record for the HP E1328A DAC (Page 1 of 3)

Test Facility: Name ____________ __ __ ______________ _______ Address ________ __ __ ______________ __ _________ City/State ___________________________________ Phone __________ __ __ __ ______________ __ _____

Special Notes: ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________

Report No. __________________________________ Date ______________________ __ ______________ _ Customer ___________________________________ Tested by __________________________________

Test Equipment Record

Model __________ __ __ __ ___________ Report No. ______________ __ ____ Date _________ __ __ __ __ _____

Test Equipment Used:

Description Model No. Trace No. Cal Due Date

1. ____________ ___________________

2. ____________ ___________________

3. ____________ ___________________

4. ____________ ___________________

5. ____________ ___________________

6. ____________ ___________________

7. ____________ ___________________

______________ ______________ ______________ ______________ ______________ ______________ ______________

34 Verification Tests Chapt er 4

Page 35

Table 4-2. Performance Test Record for the HP E1328A DAC (Page 2 of 3)

Voltage Accuracy Measurements*

Ch Output

Value (V)

-10.00000 1 1 1 1 1 1 1 1

2 2 2 2 2 2 2 2 2

3 3 3 3 3 3 3 3 3

-8.00000

-5.00000

-2.00000

0.00000 +2.00000 +5.00000 +8.00000

+10.00000

-10.00000

-8.00000

-5.00000

-2.00000

0.00000 +2.00000 +5.00000 +8.00000

+10.00000

-10.00000

-8.00000

-5.00000

-2.00000

0.00000 +2.00000 +5.00000 +8.00000

+10.00000

Low

Limit (V)

-10.14833

-8.14134

-5.13084

-2.12033

-.11334 +1.87967 +4.86916 +7.85867 +9.85167

-10.14833

-8.14134

-5.13084

-2.12033

-.11334 +1.87967 +4.86916 +7.85867 +9.85167

-10.14833

-8.14134

-5.13084

-2.12033

-.11334 +1.87967 +4.86916 +7.85867 +9.85167

Measured Value

(V)

__________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________

High

Limit (V)

-9.85167

-7.85867

-4.86916

-1.87967 +.11334

+2.12033 +5.13084 +8.14134

+10.14833

-9.85167

-7.85867

-4.86916

-1.87967 +.11334

+2.12033 +5.13084 +8.14134

+10.14833

-9.85167

-7.85867

-4.86916

-1.87967 +.11334

+2.12033 +5.13084 +8.14134

+10.14833

Measurement

Uncertainty (

103.60

µV)

83.30

52.85

22.40

2.10

22.40

52.85

83.30

52.85

22.40

2.10

22.40

52.85

83.30

52.85

22.40

2.10

22.40

52.85

83.30

Test Acc

Ratio (TAR)

>10:1 >10:1 >10:1 >10:1 >10:1 >10:1 >10:1 >10:1 >10:1

4 4 4 4 4 4 4 4 4

-10.00000

-8.00000

-5.00000

-2.00000

0.00000 +2.00000 +5.00000 +8.00000

+10.00000

-10.14833

-8.14134

-5.13084

-2.12033

-.11334 +1.87967 +4.86916 +7.85867 +9.85167

__________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________

-9.85167

-7.85867

-4.86916

-1.87967 +.11334

+2.12033 +5.13084 +8.14134

+10.14833

103.60

83.30

52.85

22.40

2.10

22.40

52.85

83.30

103.60

>10:1 >10:1 >10:1 >10:1 >10:1 >10:1 >10:1 >10:1 >10:1

* 1-year DAC and HP 3458A specifications

±5°C temp difference from cal temperature

HP 3458A ACAL within previous 24-hours

Chapter 4 Verification Tests 35

Page 36

Table 4-2. Performance Test Record for the HP E1328A DAC (Page 3 of 3)

Current Accuracy M ea sur eme n ts*

Ch Output

Value (mA)

-20.00000

-16.00000

-10.00000 1 1 1 1 1 1

2 2 2 2 2 2 2 2 2

3 3 3 3 3 3 3 3 3

-4.00000

0.00000

+4.00000 +10.00000 +16.00000 +20.00000

-20.00000

-16.00000

-10.00000

-4.00000

0.00000

+4.00000 +10.00000 +16.00000 +20.00000

-20.00000

-16.00000

-10.00000

-4.00000

0.00000

+4.00000 +10.00000 +16.00000 +20.00000

Low Limit

(mA)

-20.29665

-16.28265

-10.26165

-4.24065

-.22665 +3.75935 +9.73835

+15.71735 +19.70335

-20.29665

-16.28265

-10.26165

-4.24065

-.22665 +3.75935 +9.73835

+15.71735 +19.70335

-20.29665

-16.28265

-10.26165

-4.24065

-.22665 +3.75935 +9.73835

+15.71735 +19.70335

Measured Val u e

(mA)

____________ ____ ____________ ____ ____________ ____ ____________ ____ ____________ ____ ____________ ____ ____________ ____ ____________ ____ ____________ ____

High Limit

(mA)

-19.70335

-15.71735

-9.73835

-3.75935 +.22665

+4.24065 +10.26165 +16.28265 +20.29665

-19.70335

-15.71735

-9.73835

-3.75935 +.22665

+4.24065 +10.26165 +16.28265 +20.29665

-19.70335

-15.71735

-9.73835

-3.75935 +.22665

+4.24065 +10.26165 +16.28265 +20.29665

Meas Uncert

(µA)

1.440

1.272 .330 .168 .060 .168 .330

1.272

1.440

1.272 .330 .168 .060 .168 .330

1.272

1.440

1.272 .330 .168 .060 .168 .330

1.272

1.440

Test Acc

Ratio (TAR)

>10:1 >10:1 >10:1 >10:1 >10:1 >10:1 >10:1 >10:1 >10:1

4 4 4 4 4 4 4 4 4

-20.00000

-16.00000

-10.00000

-4.00000

0.00000

+4.00000 +10.00000 +16.00000 +20.00000

-20.29665

-16.28265

-10.26165

-4.24065

-.22665 +3.75935 +9.73835

+15.71735 +19.70335

____________ ____ ____________ ____ ____________ ____ ____________ ____ ____________ ____ ____________ ____ ____________ ____ ____________ ____ ____________ ____

-19.70335

-15.71735

-9.73835

-3.75935 +.22665

+4.24065 +10.26165 +16.28265 +20.29665

1.440

1.272 .330 .168 .060 .168 .330

1.272

1.440

>10:1 >10:1 >10:1 >10:1 >10:1 >10:1 >10:1 >10:1 >10:1

* 1-year DAC and HP 3458A specifications

±5°C temp difference from cal temperature

HP 3458A ACAL within previous 24-hours

36 Verification Tests Chapt er 4

Page 37

Chapter 5

Adjustments

Introduction This chapter contains procedures to adjust the HP E1328A D/A Converter

(DAC), including voltage adjustments and current adjustments.

The DAC should be adjusted after repair to ensure peak performance. Equipment required for the adjustment procedures is listed in Table 1-2, Recommended Test Equipment.

Before performing adjustments, the DAC must have a minimum 60-minute warm up and the line voltage must be 115/230 Vac ± 10%. For best

accuracy, the test area temperature should be between 18°C and 28°C, and stable to ± 1°C.

WARNING

Voltage Adjustments

Do not perform any of the following adjustments unless you are a qualified, service trained person and have read the WARNINGS and CAUTIONS in Chapter 1.

This adjustment is used to update the stored voltage constants for each DAC channel, and should be perfomed:

• On initial setup

• Periodically (24 hours or 90 days) to maintain specified output accuracy

(see Appendix A - Specifications of the HP E1328A User’s Manual)

• When temperature has changed more than ± 5°C from last adjustment

temperature

• When the type of load is changed

• Any time accuracy is in d ou bt

Chapter 5 Adjustments 37

Page 38

NOTE

For best measurement accuracy, perform an HP 3458A multimeter ACAL not more than 24 hours prior to these adjustments. Each DAC channel to be adjusted MUST be in the non-calibrated mode (CALx:STAT OFF), or errors in the adjustment constants will occur.

Equipment Setup

NOTE

Connect a 1 kΩ resistor and HP 3458A multimeter to the channel to be adjusted, as shown in figure 5-1. Be sure to set all three channel jumpers to the V (voltage) position. Set the HP 3458A to DCV function and set NPLC

100.

The value of 1 kΩ in Figure 5-1 is the factory value used for original adjustments. If you previously adjusted your DAC with a different

resistance value, use that resistance value rather than 1 kΩ .

Figure 5-5. Voltage Adjustment Connections

38 Adjustments Chapter 5

Page 39

Adjustment Procedures

1. Set three jumpers on Channel 1 to the V position.

Connect a 1 kΩ resistor and HP 3458A to Channel 1 (see Figure 5-1).

3. Set Channel 1 to non-calibrated mode with CAL1:STAT OFF.

4. Set Channel 1 to minimum output (-12V) with VOLT1 MIN.

Measure and record to 5 1/2 digits the actual output voltage.

5. Set Channel 1 to default output (0V) with VOLT1 DEF. Measure

and record to 5 1/2 digits the actual output voltage.

6. Set Channel 1 to maximum output (+12V) with VOLT1 MAX.

Measure and record to 5 1/2 digits the actual output voltage.

7. Enter recorded minimum, default, and maximum values with

CAL1:VOLT min,def,max. The adjustment constants are automatica lly up da te d and stored.

8. Repeat steps 1 through 7 for channels 2, 3, and 4 as desired (use

CALchan:STAT OFF, VOLTchan value, and CALchan:VOLT values).

9. Remove power and disconnect power equipment.

Example: Voltage

Adjustments

This program uses the measured minimum, default, and maximum values you enter to update the voltage adjustment constants for Channels 1, 2, 3, and 4.

10 ! Voltage Adjustments 20 ! 30 DISP CHR$(129) 40 FOR Chan= 1 TO 4 50 PRINT TABXY(1,1),"Voltage Adjustments on Channel";Chan 60 OUTPUT 70909;"CAL"&VAL$(Chan)&":STAT OFF" 70 OUTPUT 70909;"VOLT"&VAL$(Chan)&" MIN" 80 PRINT TABXY(1,18),"Channel";Chan;"is set to minimum (-12V)" 90 INPUT "Enter measured value (in V to 5.5 digits) ",Min 100 OUTPUT 70909;"VOLT"&VAL$(Chan)&" DEF" 110 PRINT TABXY(1,18),"Channel";Chan;"is set to default (0V) " 120 INPUT "Enter measured value (in V to 5.5 digits) ",Def 130 OUTPUT 70909;"VOLT"&VAL$(Chan)&" MAX" 140 PRINT TABXY(1,18),"Channel";Chan;"is set to maximum (+12V)" 150 INPUT "Enter measured value (in V to 5.5 digits) ",Max 160 OUTPUT 70909;"CAL"&VAL$(Chan)&":VOLT ";Min,Def,Max 170 NEXT Chan 180 CLEAR SCREEN 190 PRINT "Voltage Adjustments Complete" 200 END

Chapter 5 Adjustments 39

Page 40

Current Adjustments

This adjustment is used to update the stored current constants for each DAC channel, an d sh ou ld be pe rf or m ed :

• On initial setup

• Periodically (24 hours or 90 days) to maintain specified output accuracy

(see Appendix A - Specifications of the HP E1328A User’s Manual)

• When temperature has changed more than ± 5°C from last adjustment

temperature

• When the type of load is changed

• Any time accuracy is in d ou bt

NOTE

Equipment Setup

Connect the HP 3458A multimeter and a 500 Ω resistor to the channel to be adjusted, as sh ow n in Fig ur e 5- 2. Be su re to se t al l th re e ch an ne l ju m pe rs to the I (current) position. Set the HP 3458A to DCI function and set NPLC

100.

Figure 5-6. Current Adjustment Connection s

40 Adjustments Chapter 5

Page 41

NOTE

Adjustment Procedures

The value of 500 Ω in Figure 5-2 is the factory value used for original adjustments. If you previously adjusted your DAC with a different

resistance value, use that resistance value rather than 500 Ω .

1. Set three jumpers on C ha n n el 1 to the I position.

Connect a 500 Ω resistor and HP 3458A to Channel 1 (see Figure 5-2).

3. Set Channel 1 to non-calibrated mode with CAL1:STAT OFF.

4. Set Channel 1 to minimum output (-.024 A) with CURR1 MIN.

Measure and record to 5 1/2 digits the actual output current (in Amps).

5. Set Channel 1 to default output (0 A) with CURR1 DEF. Measure

and record to 5 1/2 digits the actual output current (in Amps).

6. Set Channel 1 to maximum output (+.024 A) with CURR1 MAX.

Measure and record to 5 1/2 digits the actual output current (in Amps).

7. Enter recorded minimum, default, and maximum values with

CAL1:CURR min,def,max. The adjustment constants are automatica lly up da te d and stored.

8. Repeat steps 1 through 7 for channels 2, 3, and 4 as desired (use

CALchan:STAT OFF, CURRchan value, and CALchan:CURR values).

9. Remove power and disconnect power equipment.

Example: Current

Adjustments

This program uses the measured minimum, default, and maximum values you enter to update the current adjustment constants for Channels 1, 2, 3, and 4.

10 ! Current Adjustments 20 ! 30 DISP CHR$(129) 40 FOR Chan= 1 TO 4 50 PRINT TABXY(1,1),"Current Adjustments on Channel";Chan 60 OUTPUT 70909;"CAL"&VAL$(Chan)&":STAT OFF" 70 OUTPUT 70909;"CURR"&VAL$(Chan)&" MIN" 80 PRINT TABXY(1,18),"Channel";Chan;"is set to minimum (-.024 A)" 90 INPUT "Enter measured value (in A to 5.5 digits) ",Min 100 OUTPUT 70909;"CURR"&VAL$(Chan)&" DEF" 110 PRINT TABXY(1,18),"Channel";Chan;"is set to default (0 A) " 120 INPUT "Enter measured value (in A to 5.5 digits) ",Def 130 OUTPUT 70909;"CURR"&VAL$(Chan)&" MAX" 140 PRINT TABXY(1,18),"Channel";Chan;"is set to maximum (+.024 A)" 150 INPUT "Enter measured value (in A to 5.5 digits) ",Max

Chapter 5 Adjustments 41

Page 42

160 OUTPUT 70909;"CAL"&VAL$(Chan)&":CURR ";Min,Def,Max 170 NEXT Chan 180 CLEAR SCREEN 190 PRINT "Current Adjustments Complete" 200 END

42 Adjustments Chapter 5

Page 43

Chapter 6

Replaceable Parts

Introduction This chapter co n ta in s in formation to or de r re pl ac ea bl e pa rt s fo r th e H P

E1328A D/A Converter.

Exchange

Assemblies

Ordering

Information

Table 6-1 lists assemblies that may be replaced on an exchange basis (EXCHANGE ASSEMBLIES). Exchange, factory-repaired, and tested assemblies are available only on a trade-in basis. Defective assemblies must be return ed for cre di t. Assem b li es req ui re d fo r sp ar e pa rt s st oc k must be ordered by the new assembly part number. Contact your nearest Hewlett-Packard Sales and Service Office for details.

To order a part listed in Table 6-1, specify the Hewlett-Packard part number and the quantity required. Send the order to your nearest Hewlett-Packard Sales and Service Office.

Chapter 6 Replaceable Parts 43

Page 44

Replaceable Parts List

Table 6-1, HP E1328A Replaceable Parts, lists the replac ea bl e pa rt s fo r th e HP E1328A D/A Converter. See Figure 6-1 (page 6-4) for locations of parts listed in Table 6-1.

Table 6-1. HP E1328A Replaceable Parts

Reference* Designator

A1 E1328-66501 1 PRINTED CIRCUIT ASSY [a] 28480 E1328-66501 A1BRK1

A1BRK2

A1F1-2 2110-0712 2 FUSE-SUBMINIATURE 4A 125V NTD AX 75915 R251004T1 A1J101

A1J102 A1J103 A1J201 A1J202 A1J203 A1J301 A1J302 A1J303 A1J401 A1J402 A1J403

HP Part

Number

E1328-66201 E1328-69201

0500-2183 0361-1295 0500-2183 0361-1295

1251-4682 1251-4682 1251-4682 1251-4682 1251-4682 1251-4682 1251-4682 1251-4682 1251-4682 1251-4682 1251-4682 1251-4682

Qty Description Mfr**

Code

EXCHANGE ASSEMBLIES

4-CHAN D/A CONVERTER (NEW)

4-CHAN D/A CONVERTER (EXCH)

BRACKET-RIGHT ANGLE,MTG;PNL-PCB

RIVET-SEMITUBULAR .095 DIA .406 LNG BRACKET-RIGHT ANGLE,MTG;PNL-PCB RIVET-SEMITUBULAR .095 DIA .406 LNG

12 CONN-POST TYPE-.100-PIN-SPCG 3-CONT

CONN-POST TYPE-.100-PIN-SPCG 3-CONT CONN-POST TYPE-.100-PIN-SPCG 3-CONT CONN-POST TYPE-.100-PIN-SPCG 3-CONT CONN-POST TYPE-.100-PIN-SPCG 3-CONT CONN-POST TYPE-.100-PIN-SPCG 3-CONT CONN-POST TYPE-.100-PIN-SPCG 3-CONT CONN-POST TYPE-.100-PIN-SPCG 3-CONT CONN-POST TYPE-.100-PIN-SPCG 3-CONT CONN-POST TYPE-.100-PIN-SPCG 3-CONT CONN-POST TYPE-.100-PIN-SPCG 3-CONT CONN-POST TYPE-.100-PIN-SPCG 3-CONT

28480 28480

28480 00000 28480 00000

26742 26742 26742 26742 26742 26742 26742 26742 26742 26742 26742 26742

Mfr Part Number

E1328-66201 E1328-69201

0050-2183 ORDER BY DESCRIP 0050-2183 ORDER BY DESCRIP

1102-1-103-02 1102-1-103-02 1102-1-103-02 1102-1-103-02 1102-1-103-02 1102-1-103-02 1102-1-103-02 1102-1-103-02 1102-1-103-02 1102-1-103-02 1102-1-103-02 1102-1-103-02

A1P1

A1SW1 A1TB1 A1TB2 A1TB3 A1TB4

MP1 MP2 PNL1 SCR1-SCR2 SCR3-SCR4 SCR5-SCR6 SHD1 MNL1

1252-1596 0361-1294 3101-3066 0360-2390 0360-2390 0360-2390 0360-2390

E1300-45101† E1300-45102† E1328-00202† 0515-1968 0515-2140 0515-2743 E1300-80601 E1328-90004

CONN-POST-TYPE;2.54-PIN-SPCG96-CONT

RIVET-SEMITUBULAR .095 DIA .328 LNG

SWITCH-DIP RKR SPST 0.1A 5VDC

TERMINAL BLOCK 4POS. SCREW TYPE TERMINAL BLOCK 4POS. SCREW TYPE TERMINAL BLOCK 4POS. SCREW TYPE TERMINAL BLOCK 4POS. SCREW TYPE

MECHANICAL PARTS

HNDL-KIT TOP, HP

HNDL-KIT BTM, VXI

PNL-RR 4 CH DAC

SCR-THD-RLG M2.5 X0.45 14mm

SCR

SCR-FH M2.5 X 8 THREAD ROLLING

SHIELD SAFETY

MNL-USERS E1328A

06776 00000 81073 28480 28480 28480 28480

28480 28480 28480 28480 28480 28480 28480 28480

DIN-96CPC-SRI-TR ORDER BY DESCRIP 76YY22968S 0360-2390 0360-2390 0360-2390 0360-2390

E1300-45101 E1300-45102 E1328-00202 0515-1968 0515-2140 0515-2743 E1300-80601 E1328-90004

* See Table 6-2 for Reference Designator definitions. ** See Table 6-3 for Code List of Manufacturers [a] Repair limited to replacement of parts listed - see Introduction for ordering information

† These parts are not compatible with older version fixed handles or their corresponding front panels. To replace one or more of these old parts, you must order all three new parts (Top and Bottom Handle Kits AND External Panel).

44 Replaceable Parts Chapter 6

Page 45

Table 6-2. HP E1328A Reference Designators

HP E1328A Reference Designators

A .......................................... assembly

BRK ............ .. .. .. .............. .. ....... bracket

F ................................................... fuse

J ................ electrical connector (jack)

MNL ........................................ manual

MP .................. misc. mechanical part

P .............. electrical connector (plug)

PNL ............................................ panel

SCR ............ .. .. .. .............. .. ......... screw

SHD ............ .. .. .. .............. .. ......... shield

SW ............................................ switch

TB .......... ....................... terminal block

Table 6-3. HP E1328A Code List of Manufacturers

Mfr

Manufacturer Name Address

Code

00000 06776 26742 28480 75915 81073

Any satisfac tory supplier Robinson Nugent Inc Methode Electronics, inc Hewlett-Packard Company Littelfuse Inc Grayhill Inc

New Albany, IN US 47150 Chicago, IL 60656 Palo Alto, CA US 94304 Des Plaines, IL US 60016 La Grange, IL US 60525

Chapter 6 Replaceable Parts 45

Page 46

Figure 6-7. HP E1328A DAC - Replaceable Parts

46 Replaceable Parts Chapter 6

Page 47

Chapter 7

Manual Changes

Introduction This chapter co n ta in s in formation to ad ap t this manual to in st ru m en ts for

which the content does not directly apply. Since this manual applies directly to instr um e nt s w ith se ri al num bers listed on the ti tl e pa ge , ch ange information is not required. See D/A Converter Serial Numbers in Chapter 1 for HP E1328A D/A Converter serial number information.

Chapter 7 Manual Changes 47

Page 48

48 Manual Changes Chapter 7

Page 49

Chapter 8

Service

Introduction This chapter contains information to service the HP E1328A D/A Converter

(DAC), including trouble shooting guidelines and repair/maintenance guidelines.

WARNING

Equipment

Required

Do not perform any of the service procedures shown unless you are a qualified, service-trained person, and have read the WARNINGS and CAUTIONS in Chapter 1.

Equipment required for DAC trouble shooting and repair is listed in Table 1-2, Recommended Test Equipment. To avoid damage to the screw head slots, use Pozidrive or Torx drivers as required.

Service Aids Service aids on printed circuit boards include pin numbers, some reference

designations, and assembly part numbers. See Chapter 6 - Replaceable Parts for descriptions and location of HP E1328A replaceable parts.

Service notes, manual updates , an d se rv ic e li te ra tu re for the HP E13 28 A DAC may be available through Hewlett-Packard. For information, contact your nearest H ewl et t- Pac ka rd Sale s an d Ser vi ce Offi ce .

Troubleshooting Techniques

Identifying the

There are two main steps to trouble shoot an HP E1328A DAC problem: (1) identify the problem, and (2) test the DAC to isolate the cause to a user-replaceable component.

DAC problems can be divided into four general categories:

Problem

• Self-test errors

• Operator errors

• Catastrophic failures

• Performance out of specification

Chapter 8 Service 49

Page 50

Self-Test Errors

An error number (-330) is returned when the DAC self-test fails. If a self-test error occurs, recycle power and repeat the self-test. If the error repeats, see "Testing the DAC" to trouble shoot the DAC.

Operator Errors

Apparent failures may result from operator errors in sending SCPI messages to the DAC. See Chapter 5 - 4-Channel D/A Converter Command Reference in the HP E1328A User’s Manual for informati o n on po ss ible SCPI command errors.

Catastrophic Failure

If a catastroph ic fai lu re o cc ur s, se e "Te st in g the DAC" to trou ble shoot the DAC.

Performance Out of Specification

If the DAC performance is out of specification limits, use the adjustment procedures in Chapter 5 - Adj us tments to correct the problem. If the condition repeats, see "Testing the DAC" to trouble shoot the DAC.

Testing the DAC Table 8-1 lists the erro r mes sa g e s as so ciat ed wi th the DAC . Based on the

error returned from the DAC, you can use the tests and checks in Table 8-2 to isolate the problem to a user replaceable part on the DAC rear panel or to the A1 PCA. See Figure 6-1 in Chapter 6 - Replaceable Parts for locations of user-repla ceable parts.

NOTE

If the problem cannot be traced to a user-replaceable part listed in Table 6-1, return the counter to Hewlett-Packard for exchange. See Chapter 6 Replaceable Parts for procedures.

50 Service Chapter 8

Page 51

Table 8-1. HP E1328A DAC Error Messages

No. Title Potential Cause(s)

-330

-240

-221

2801 Channel 1 current

2802 Channel 2 current

2803 Channel 3 current

2804 Channel 4 current

2805 Channel 1 voltage

2806 Channel 2 voltage

2807 Channel 3 voltage

2808 Channel 4 voltage

Self-Test Failure Hardware Failure Jumper Setti ngs

checksum error

Module malfunction Module malfunction

Channel’s V/I jumper in incorrect position

Channel 1 stored adjustment constant (current) is corrupted

Channel 2 stored adjustment constant (current) is corrupted

Channel 3 stored adjustment constant (current) is corrupted

Channel 4 stored adjustment constant (current) is corrupted

Channel 1 stored adjustment constant (voltage) is corrupted

Channel 2 stored adjustment constant (voltage) is corrupted

Channel 3 stored adjustment constant (voltage) is corrupted

Channel 4 stored adjustment constant (voltage) is corrupted

Table 8-2. HP E1328A Tests/Checks

Test/Check Reference

Check:

Designator

Heat Damage - - - - - - - - - - Discolored PC boards

Damaged insulation Evidence of arcing

Switch Setting SW1 LADDR setting

A1 PCA F1, F2

J101 - J402 P1 TB1 - TB4

Fuse continuity Mating connector contacts jumper in wrong position Connector contacts

Checking Heat Damage

Chapter 8 Service 51

Page 52

Inspect the DAC for signs of abnormal internally generated heat such as discolored printed circuit boards or components, damaged insulation, or evidence of arcing. If there is damage, do not operate the DAC until you correct the problem.

Checking Switches/Jumpers

Verify the logical address setting is set correctly (factory set at 72). See the HP E1328A User’s Manual for information.

Testing the A1 Assembly

To test the A1 Assembly, remove mainframe power and remove the DAC from the mainframe. Then, see table 8-2 for guidelines to isolate the problem to a user-replaceable part.

Repair / Maintenance

This section gives guidelines to repair and maintain the HP E1328A DAC, including:

Guidelines

• ESD precautions

• Soldering printed circuit boards

• Post-repair safety checks

ESD Precautions Electrostatic discha rg e (ESD) may da m ag e M OS, CM OS and oth er static

sensitive devices in the HP E1328A DAC. This damage can range from slight parameter degradation to catastrophic failure. When handling DAC assemblies, follow these guidelines to avoid damaging DAC components:

• Always use a static-free work station with a pad of conductive

rubber or similar material when handling DAC components.

• After you remove the DAC from the mainframe, place the DAC on

a conductive surface to guard against ESD damage.

• Do not use pliers to remove a MOS or CMOS device from a

high-grip socket. Instead, use a small screwdriver to pry the device up from one end. Slowly lift the device up, one pair of pins at a time.

52 Service Chapter 8

Page 53

• After you remove a MOS or CMOS device from an assembly, place

the device onto a pad of conductive foam or other suitable holding material.

• If a device requires soldering, be sure the assembly is placed on a

pad of conductive material. Also, be sure you, the pad, and the soldering iron tip are grounded to the assembly. Apply as little heat as possible when soldering.

• When you replace a MOS or CMOS device, ground the foam to the

DAC before removing the device from the foam.

Soldering Printed

Circuit Boards

CAUTION

The etched circuit boards in the DAC have plated-through holes that allow a solder path to both sides of the insulating material. Soldering can be done from either side of the board with equally good results. When soldering to any circuit board, keep in mind the following guidelines.

Do not use a sharp metal object such as an awl or twist drill, since sharp objects may damage the plated-through conductor.

• Avoid unnecessary com p on en t unsoldering an d so ld er in g.

Excessive replacement can result in damage to the circuit board and/or adjacent components.

• Do not use a high power soldering iron on etched cir cu it boa rd s

(a 38-watt soldering iron is recommended), as excessive heat may lift a conductor or damage the board.

• Use a suction device or wooden toothpick to remove solder from

component mounting holes. When using a suction device, be sure the equipment is properly grounded to prevent electrostatic discharge from damaging CMOS devices.

Post-Repair Safety

Checks

After making repairs to the HP E1328A DAC, inspect the DAC for any signs of abnormal internally generated heat, such as discolored printed circuit boards or components, damaged insulation, or evidence of arcing. Determine and correct the cause of the condition. Then run the self-test (*TST? command) to verify that the DAC is functional.

Chapter 8 Service 53

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54 Service Chapter 8

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Appendix A

Calculating D/A Converter Accuracy

Introduction This appendix shows how D/A Converter (DAC) accuracy, HP 3458A

multimeter measurement uncertainty, and test accuracy ratio (TAR) values are defined and calculated for the performance verification tests for the HP E1328A DAC.

See Table 4-2, "Performance Test Record for the HP E1328A DAC" for 1-year specification values for DAC accuracy, 1-year measurement uncertainty val ue s fo r th e H P 34 5 8A mul ti met er , an d as so ci at ed DAC te st accuracy ratios (TARs).

NOTE

DAC Accuracy

Definition

Measurement

Uncertainty Definition

Test Accuracy Ratio

(TAR) Definition

DAC accuracy, multimeter measurement uncertainty, and test accuracy ratios in Table 4-2 are valid ONLY for the specified test conditions and assumptions described in this manual. For the test conditions described, in TARs exceed 4:1

DAC accuracy is the expected accuracy of the measurement due ONLY to the D/A Converter. The "Low Limit" entry in Table 4-2 is the lower (-) value of DAC accuracy, while the "High Limit" entry is the upper (+) value of DAC accuracy.

Measurement Uncertainty is the expected accuracy of the HP 3458A multimeter for specified conditions. This value is shown in the "Measurement Uncertainty" column of Table 4-2. See the HP 3458A Multimeter Operating, Programming, and Configuration Manual for additional information on calculating HP 3458A multimeter measurement uncertainty.

Test Accuracy Ratio (TAR) is the ratio of DAC accuracy to HP 3458A multimeter measurement uncertainty. For the HP E1328A DAC performance tests, Test Accuracy Ratio = (High Limit value - Test Output value)/Measurement Uncertainty value. This value is shown in the "Test Accuracy Ratio (TAR)" column of Table 4-2.

Appendix A Calculating D/A Converter Accuracy 55

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DAC Accuracy Calculations

For the HP E1328A DAC performance verification tests, accuracy is defined for DC Voltage and DC Current outputs using the 1-year specifications in Appendix A - Specifications of the HP E1328A User’s Manual. The assumed test conditions are:

• 1 year since calibration

• At least 1-hour warmup

• Temperature ± 5°C different than calibration temp

• Calibration ON state (CAL x :STAT O N ) fo r ea ch cha nn el

• Same load as at calibration

DC Voltage

Accuracy Equations

DC Current

Accuracy Equations

From Appendix A of the HP E1328A User’s Manual, DC Voltage Accuracy (1-year) = Accuracy + Temperature Coefficient = ± [(.3% of

output + 110 mV) + (0.01% output +.667 mV)/°C]. For 1-year specifications and ± 5°C difference from calibration temperature:

DC Voltage Accuracy (in Volts) = ± (.0035 x output + .11334),

where output is in Volts.

Example: Calculate DC Voltage Output Accuracy

For a 5.0 V dc output:

DCV Accuracy (1-year) = ± [.0035 x 5.0 + .11334] = ± 0.13084V. Thus, for a 5.0 V output, the Upper Limit value in Table 4-2 = 5.13084 V and the Lower Limit value = 4.86916 V.

From Appendix A of the HP E1328A User’s Manual, DC Current

Accuracy 1-year) = Accuracy + Temperature Coefficient = ± [(.3% of output + 220 µA) + (.01% of output + 1.33 µA)/°C]. For 1-year

specifications and ± 5°C difference from calibration temperature:

DC Current Accuracy (in A) = ± (.0035 x output + 226.65 X 10-6),

where output is in Amps.

Example: Calculate DC Current Output Accuracy

For a 10.0 mA dc outpu t, Ac cur ac y (1 -year) = ± [.0035 x 10.0 x 10

226.65 x 10

-6

) = ± 0.26165 mA. Thus, for a 10.0 mA output, the Upper

-3

56 Calcul ating D/A Converter Accuracy Appendix A

Page 57

Limit value in Table 4-2 = 10.26165 mA and the Lower Limit value =

9.73835 mA.

HP 3458A Measurement Uncertainty Calculations

Calculate DCV

Measurement

Uncertainty

Measurement uncertainties for the HP 3458A multimeter are calculated using the 1-year accuracy specifications in Appendix A - Specifications of the HP 3458A Multimeter Operating, Programming, and Configuration

Manual

The assumed test conditions are:

• Test within 24 hours of last HP 3458A ACAL

• 1 year since last HP 3458A calibration

• At least a 1-hour warmup fo r HP 345 8A

• (For DCV) 10V fixed range, PRESET, and NPLC 100

• (For DCI ) 10 mA or 100 mA fixed range, PRESET, and NPLC

100

For HP 3458A 1 Year specif ic atio ns , M ea sur eme n t Unce rt ai nty (DC

Voltage) = Accuracy (1 year) + Temperature Coefficient + Additional reading error for Absolute Accuracy.

Accuracy = ± [8.0 ppm of Reading + 0.2 ppm of Range] Temp Coeff = ± [0.15 ppm of Reading + 0.01 ppm of Range] Absolute Accuracy Factor = ± [2.0 ppm of Reading]

Meas Uncert (V) = ± [10.15 ppm of Reading + 0.21 ppm of Range]

Reading and Range in Volts DC

Example: Calculate DCV Measurement Uncertainty

For a 5.0 V dc reading on the 10V range for the conditions specified in this manual:

Calculate DCI Measurement

Uncertainty

-6

Measurement Uncertainty (V) = ± (10.15 x 10 x Range) = ± [1 0-6 x (10.15 x 5.0 + 0.21 x 10.0)] = ± 52.85 x 10-6 V = ± 52.85 µV.

For HP 3458A 1 Year specif ic atio ns , M ea sur eme n t Unce rt ai nty (DC

Current) = Accuracy (1 year) + Temperature Coefficient + Additional reading error for Absolute Accuracy.

For the 10 mA range:

x Reading + 0.21 x 10

-6

Appendix A Calculating D/A Converter Accuracy 57

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Accuracy (10 mA range) = ± [20.0 ppm of Reading + 5.0 ppm of Range] Temp Coeff = ± [2.0 ppm of Reading + 1.0 ppm of Range] Absolute Accuracy Factor = ± [5.0 ppm of Reading]

Meas Uncertainty (A) = ± [27.0 ppm of Reading + 6.0 pp of Range]

Reading and Range in Amps DC

For the 100 mA range:

Accuracy (100 mA range) = ± [35.0 ppm of Reading + 5.0 ppm Range] Temp Coeff = ± [2.0 ppm of Reading + 1.0 ppm of Range] Absolute Accuracy Factor = ± [5.0 ppm of Reading]

Meas Uncertainty (A) = ± [42.0 ppm of Reading + 6.0 ppm of Range]

Reading and Range in Amps DC

Example: Calculate DCI Measurement Uncertainty

Test Accuracy Ratio (T A R) Calculations

For a 4.0 mA dc reading on the 10 mA range for the conditions specified in this manual:

Measurement Uncertainty (Amps) = ± [10 Range)] = ± [10

-6

x (27.0 x .004 + 6.0 x .010)] = ± 0.168 x 10-6 A =

-6

x (27.0 x Reading + 6.0 x

± 0.168 µA.

For a 16.0 mA dc reading on the 100 mA range for the conditions specified in this manual:

-6

Measurement Uncertainty (Amps) = ± [10 Range)] = ± [10

-6

x (42.0 x .016 + 6.0 x .100)] = ± 1.272 x 10-6 A=

x (42.0 x Reading + 6.0 x

± 1.272 µA.

For the HP E1328A D/A Converter:



Test Accuracy Ratio (TAR) =

High Limit − Output



Measurement Uncertainty



  

Example: Calculate Voltage Output Test Accuracy Ratio

58 Calcul ating D/A Converter Accuracy Appendix A

Page 59

For an 8.0 V dc output, if the High Limit value = 8.14134 V and Measurement Uncertainty = ± 83.3 µV, Test Accuracy Ratio (TAR) =

(8.14134 V - 8.00000 V)/83.3 x 10

-6

V = 1696.76. Since this value is

> 10:1, the entry in Table 4-2 is "> 10:1".

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60 Calcul ating D/A Converter Accuracy Appendix A

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Appendix B

Verification Tests - C Programs

Functional

These programs are designed to do the Functional Verification Tests found in Chapter 4 - Verification Tests.

Verification Test

Example: Self Test This example performs a DAC self test (*TST? command) to ensure that the

DAC is communicating with the mainframe, external controller, and/or external terminal.

#include <stdio.h> #include <sicl.h>

#define ADDR "hpib7,9,9" /* Address of Device */ void main ()

{ INST id; /* Define id as an instrument */ char a[256] = {0}; /* Result variable */

id = iopen (ADDR); /* Open instrument session */ itimeout (id, 10000); /* Set 10 sec timeout */ ipromptf (id, "*TST?\n", "%t", a); /* Self test command */ printf ("\n %s", a); /* Print result */ getchar (); /* Pause */ iclose (id); /* Close instrument session */

}

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Example: Positive

Voltage Compliance

This program checks the MEASURED voltage output from the DAC channel being tested. If the measured channel output is ≥ 15.0V when the

output stops increasing, the program generates a "Test PASSED" indication. If the measured channel output is < 15.0V when the output stops increasing, the program generates a "Test FAILED" indication.

/* Positive Voltage Compliance Test E1328A */ #include <stdio.h>

#include <sicl.h> #define ADDR "hpib7,9,9" /* Address of device */ void main ()

{ INST id; /* Define id as an instrument */ float source = 0, value = 0, old_value = 0, result = 0; int chan; char *pass;

#if defined(__BORLANDC__) && !defined(__WIN32__) _InitEasyWin(); #endif

ionerror(I_ERROR_EXIT); /* Exit on error */ id = iopen (ADDR); /* Open instrument session */

itimeout (id, 10000); /* Set 10 sec timeout */ for(chan = 1; chan <= 4; chan++)

{ iprintf (id, "CAL%u:STAT OFF\n", chan); iprintf (id, "VOLT%u MAX\n", chan); source = 4.5; value = 0; printf ("\nVoltage Compliance Tests on Channel %u", chan);

do { source = source + 0.5; old_value = value; printf("\n Set source to %.1f Volts DC", source); printf("\n Measure channel output (in V)"); printf("\n Enter channel output (in V): "); scanf ("%f", &value); printf("\n DC Source value = %.1f VDC", source); printf("\n Channel %u output = %.1f VDC", chan, value); result = value - old_value; } while (result != 0);

62 Verification Tests - C Programs Appendix B

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if (value >= 15) pass = "PASSED"; else pass = "FAILED"; printf("\n\nMaximum channel %u output = %.1f volts", chan, value); printf("\nTest %s for channel %u\n", pass, chan); }

iclose (id); /* Close instrument session */ }

Example: Positive

Current Compliance

This program checks the MEASURED current output from the DAC channel being tested. If the DC SOURCE voltage is ≥ 13.0V when the

output current drops to 90% of maximum current, the program generates a "Test PASSED" indication. If the DC SOURCE voltage is < 13.0V when the output current drops to 90% of maximum current, the program generates a "Test FAILED" indication.

/* Positive Current Compliance Test E1328A */ #include <stdio.h>

#include <math.h> #include <sicl.h>

#define ADDR "hpib7,9,9" /* Address of device */ void main ()

{ INST id; /* Define id as an instrument */ float source = 0, value = 0, result = 0; int chan; char *pass;

#if defined(__BORLANDC__) && !defined(__WIN32__) _InitEasyWin(); #endif

ionerror(I_ERROR_EXIT); /* Exit on error */ id = iopen (ADDR); /* Open instrument session */ for(chan = 1; chan <= 4; chan++)

{ iprintf (id, "CAL%u:STAT OFF\n", chan); iprintf (id, "CURR%u MAX\n", chan);

Appendix B Verification Tests - C Programs 63

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source = 11.5; value = 0; printf ("\nCurrent Compliance Tests on Channel %u", chan);

do { source = source + 0.5; printf("\n Set source to %.1f Volts DC", source); printf("\n Measure channel output (in mA)"); printf("\n Enter channel output (in mA): "); scanf ("%f", &value); result = abs(100 * value / 24.0); printf("\n DC Source value = %.1f VDC", source); printf("\n Channel %u output = %.1f mA", chan, value); printf("\n Output = %.2f %% of max value", result); } while (result > 90.0);

if (source >= 13.0) pass = "PASSED"; else pass = "FAILED";

printf("\n\nDC Source value for 90\% of max = %.1f VDC", source); printf("\nTest %s for channel %u\n", pass, chan); }

iclose (id); /* Close instrument session */ }

64 Verification Tests - C Programs Appendix B

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Performance Verification Tests

These programs are designed to do the Performance Verification Tests found in Chapter 4 - Verification Tests.

Example: Voltage

Accuracy

Measurements

This program checks the MEASURED output voltage on each DAC channel and compares the result with the 1-year accuracy specifications for the DAC.

/* Voltage Accuracy Measurements Test E1328A */ #include <stdio.h>

#include <math.h> #include <sicl.h>

#define ADDR "hpib7,9,9" /* Address of device */ void main ()

{ INST id; /* Define id as an instrument */ float volts[9] = {-10, -8, -5, -2, 0, 2, 5, 8, 10}; float acc, ulim, llim, meas; int chan,i;

#if defined(__BORLANDC__) && !defined(__WIN32__) _InitEasyWin(); #endif

ionerror(I_ERROR_EXIT); /* Exit on error */ id = iopen (ADDR); /* Open instrument session */ iprintf (id, "*RST\n"); for(chan = 1; chan <= 4; chan++)

{ printf ("\nVoltage Accuracy Measurements on Channel %u\n", chan);

for (i = 0; i < 9; i++) { iprintf (id, "VOLT%u %f\n", chan, volts[i]); printf ("\n New voltage output on channel %u = %f V", chan, volts[i]); printf ("\n Enter MEASURED voltage value (in V) : "); scanf ("%f", &meas);

acc = 0.0035 * abs(volts[i]) + .11334; llim = volts[i] - acc; ulim = volts[i] + acc;

Appendix B Verification Tests - C Programs 65

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if ((meas < llim) || (meas > ulim)) printf ("Test FAILED on channel %u for %.1f V", chan, volts[i]); else printf ("Test PASSED on channel %u for %.1f V", chan, volts[i]); } }

printf ("Voltage Accuarcy Tests Complete"); iclose (id); /* Close instrument session */

}

Example: Current

Accuracy

Measurements

This program checks the MEASURED output current on each DAC channel and compares the result with the 1-year accuracy specifications for the DAC.

/* Current Accuracy Measurements Test E1328A */ #include <stdio.h>

#include <math.h> #include <sicl.h>

#define ADDR "hpib7,9,9" /* Address of device */ void main ()

{ INST id; /* Define id as an instrument */ float amps[9] = {-.02, -.016, -.01, -.004, 0, .004, .01, .016, .02}; float acc, ulim, llim, meas; int chan,i;

#if defined(__BORLANDC__) && !defined(__WIN32__) _InitEasyWin(); #endif

ionerror(I_ERROR_EXIT); /* Exit on error */ id = iopen (ADDR); /* Open instrument session */ iprintf (id, "*RST\n"); for(chan = 1; chan <= 4; chan++)

66 Verification Tests - C Programs Appendix B

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{ printf ("\nCurrent Accuracy Measurements on Channel %u\n", chan);

for (i = 0; i < 9; i++) { iprintf (id, "CURR%u %f\n", chan, amps[i]); printf ("\n New current output on channel %u = %f A", chan, amps[i]); printf ("\n Enter MEASURED current value (in mA) : "); scanf ("%f", &meas);

acc = 0.0035 * abs(amps[i]) + .00022665; llim = amps[i] - acc; ulim = amps[i] + acc; if ((meas*.001 < llim) || (meas*.001 > ulim)) printf ("Test FAILED on channel %u for %f A", chan, amps[i]); else printf ("Test PASSED on channel %u for %f A", chan, amps[i]); } }

printf ("Current Accuarcy Tests Complete"); iclose (id); /* Close instrument session */

}

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Adjustments These programs are designed to assist with the adjustment procedures found

in Chapter 5 - Adjustments.

Example: Voltage

Adjustments

This program uses the measured minimum, default, and maximum values you enter to update the voltage adjustment constants for Channels 1, 2, 3, and 4.

/* Voltage Adjustments E1328A */ #include <stdio.h>

#include <sicl.h> #define ADDR "hpib7,9,9" /* Address of device */ void main ()

{ INST id; /* Define id as an instrument */ float min, def, max; int chan;

#if defined(__BORLANDC__) && !defined(__WIN32__) _InitEasyWin(); #endif

ionerror(I_ERROR_EXIT); /* Exit on error */ id = iopen (ADDR); /* Open instrument session */ for(chan = 1; chan <= 4; chan++)

{ printf ("\nVoltage Adjustments on Channel %u", chan); iprintf (id, "CAL%u:STAT OFF\n", chan);

iprintf (id, "VOLT%u MIN\n", chan); printf ("\n\nChannel %u is set to minimum (-12V)", chan); printf ("\nEnter measured value (in V to 5.5 digits) : "); scanf ("%f", &min);

iprintf (id, "VOLT%u DEF\n", chan); printf ("\nChannel %u is set to default (0V)", chan); printf ("\nEnter measured value (in V to 5.5 digits) : "); scanf ("%f", &def);

iprintf (id, "VOLT%u MAX\n", chan); printf ("\nChannel %u is set to maximum (+12V)", chan); printf ("\nEnter measured value (in V to 5.5 digits) : "); scanf ("%f", &max);

iprintf (id, "CAL%u:VOLT %f,%f,%f\n",chan,min,def,max);

68 Verification Tests - C Programs Appendix B

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} printf ("\n\nVoltage Adjustments Complete"); iclose (id); /* Close instrument session */

}

Example: Current

Adjustments

This program uses the measured minimum, default, and maximum values you enter to update the current adjustment constants for Channels 1, 2, 3, and 4.

/* Current Adjustments E1328A */ #include <stdio.h>

#include <sicl.h> #define ADDR "hpib7,9,9" /* Address of device */ void main ()

{ INST id; /* Define id as an instrument */ float min, def, max; int chan;

#if defined(__BORLANDC__) && !defined(__WIN32__) _InitEasyWin(); #endif

ionerror(I_ERROR_EXIT); /* Exit on error */ id = iopen (ADDR); /* Open instrument session */ for(chan = 1; chan <= 4; chan++)

{ printf ("\nCurrent Adjustments on Channel %u", chan); iprintf (id, "CAL%u:STAT OFF\n", chan);

iprintf (id, "CURR%u MIN\n", chan); printf ("\n\nChannel %u is set to minimum (-.024 A)", chan); printf ("\nEnter measured value (in A to 5.5 digits) : "); scanf ("%f", &min);

iprintf (id, "CURR%u DEF\n", chan); printf ("\nChannel %u is set to default (0 A)", chan); printf ("\nEnter measured value (in A to 5.5 digits) : "); scanf ("%f", &def);

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iprintf (id, "CURR%u MAX\n", chan); printf ("\nChannel %u is set to maximum (+.024 A)", chan); printf ("\nEnter measured value (in A to 5.5 digits) : "); scanf ("%f", &max);

iprintf (id, "CAL%u:CURR %f,%f,%f\n",chan,min,def,max); }

printf ("\n\nCurrent Adjustments Complete"); iclose (id); /* Close instrument session */

}

70 Verification Tests - C Programs Appendix B

HP E1328A Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual