HP E1328A Service Manual

4-channel d/a converter.
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Chapter 1. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Chapter 3. Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Chapter 4. Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
HP E1328A Service Manual
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
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Preparation for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Shipping Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
D/A Converter Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Operator's Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Self-Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Example: D/A Converter Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Test Conditions / Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Performance Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Verification Test Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Functional 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
Test Procedure (Positive Current Compliance) . . . . . . . . . . . . . . . . . . . . 26
Test Procedure (Negative Current Compliance) . . . . . . . . . . . . . . . . . . . . 26
Example: Positive Current Compliance . . . . . . . . . . . . . . . . . . . . . . . . 27
Operation Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Performance Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Voltage Accuracy Measurements Test . . . . . . . . . . . . . . . . . . . . . . . . . 29
HP E1328A Service Manual
Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Contents
Contents 1

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  • Page 1

    Edition 2 Click here to return to HP TS-5400 Systems On-Line Manuals Main Contents Chapter 1. General Information ....... . . 9 Introduction .

  • Page 2: Table Of Contents

    DC Current Accuracy Equations ......56 HP 3458A Measurement Uncertainty Calculations ....57 Calculate DCV Measurement Uncertainty .

  • Page 3: Table Of Contents

    Example: Voltage Adjustments ......68 Example: Current Adjustments ......69 HP E1328A Service Manual Contents 3...

  • Page 4

    Notes 4 Contents HP E1328A Service Manual...

  • Page 5: Declaration Of Conformity

    For warranty service or repair, this product must be returned to a service facility designated by Hewlett-Packard (HP). Buyer shall prepay ship- ping 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.

  • Page 6: Edition

    Printing History 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 Edi- tion 1. The Edition number increments by 1 whenever the manual is revised. Updates, which are issued between Editions, contain replacement pages to correct the current Edition of the manual.

  • Page 7

    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.

  • Page 8

    Mainframe User’s Manual. This manual contains programming information for the mainframe, front panel operation information (for the HP E1301A mainframe), and general programming information for instruments installed in the mainframe. Plug-In Module User’s Manuals. These manuals contain plug-in module programming and configuration information.

  • Page 9: Introduction, Chapter 1. General Information

    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...

  • Page 10: Safety Considerations, Warnings And Cautions

    Safety This product is a Safety Class I instrument that is provided with a protective Considerations 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.

  • Page 11

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

  • Page 12: Dac Description, Dac Specifications

    The HP E1328A DAC is an "instrument" in the slots of a VXIbus Description mainframe. As such, it is assigned an error queue, input and output buffers, status registers, and is allocated a portion of mainframe memory for reading storage.

  • Page 13: Dac Options

    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.

  • Page 14: Recommended Test Equipment

    Recommended Table 1-2 lists the test equipment recommended for testing, adjusting, and Test Equipment servicing the HP E1328A DAC. Essential requirements for each piece of test equipment are described in the Requirements column. Table 1-2. Recommended Test Equipment Instrument Requirements...

  • Page 15: Initial Inspection, Introduction, Preparation For Use, Chapter 2. Installation

    Hewlett-Packard, and keep the shipping materials for the carrier’s inspection. Preparation for 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-Packard, consult the manufacturer for a list of available manual(s).

  • Page 16: Shipping Guidelines

    Shipping Follow the steps in Figure 2-1 to return the HP E1328A D/A Converter to a Guidelines 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...

  • Page 17: D/a Converter Operation, Introduction, Operator's Check, Chapter 3. Operating Instructions

    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 (self-test) D/A Converter See the HP E1328A 4-Channel D/A Converter User’s Manual for D/A Operation Converter operation, including:...

  • Page 18: Self-test Procedure, Example: D/a Converter Self-test

    Verify proper connection and address selection before trouble shooting. Example: D/A An example follows which uses an HP 9000 Series 300 computer with HP BASIC and a D/A Converter address of 70909. Converter Self-Test 10 OUTPUT 70909;"*TST?"...

  • Page 19: Test Conditions / Procedures, Introduction, Chapter 4. Verification Tests

    WARNINGS and CAUTIONS in Chapter 1. Test Conditions / For valid tests, all test equipment and the HP 3458A multimeter must have a Procedures 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.

  • Page 20: Performance Test Record

    Performance Test Table 4-2, Performance Test Record for the HP E1328A DAC, at the end of this chapter, provides space to enter the results of each Performance Record Verification test and to compare the results with the upper and lower limits for the test.

  • Page 21: Functional Verification Tests, Dac Self-test, Voltage Compliance Tests

    Functional The functional verification tests for the HP E1328A DAC can be performed Verification at any time to verify the DAC is functional and is communicating with the mainframe, external computer and/or external terminal. The functional tests Tests for the HP E1328A DAC are:...

  • Page 22: Test Procedure (positive Voltage Compliance)

    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.

  • Page 23: Test Procedure (negative Voltage Compliance), Example: Positive Voltage Compliance

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

  • Page 24: 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 increased in + 0.5V steps until the channel output decreases to 90% of the maximum current value (decreases to +21.6 mA).

  • Page 25

    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).

  • Page 26: Test Procedure (positive Current Compliance), Test Procedure (negative Current Compliance)

    Compliance) 1. Set three jumpers on each channel 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.

  • Page 27: Example: Positive Current Compliance

    9. Remove power and disconnect test equipment Example: Positive This program checks the MEASURED current output from the DAC Current Compliance 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"...

  • Page 28: Operation Verification Tests

    See Performance Verification Tests for details on the test procedures. NOTE For best results, perform an ACAL on the HP 3458A multimeter not more 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.

  • Page 29: Performance Verification Tests, Voltage Accuracy Measurements Test

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

  • Page 30

    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 8.

  • Page 31: Counter Accuracy Measurements Test

    Connect the equipment as shown in Figure 4-4. Be sure the three jumpers in each DAC channel are set to the I (current) position. Then, set the HP 3458A to DCI function and set NPLC 100. Figure 4-4. Current Measurement Accuracy Connections...

  • Page 32

    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...

  • Page 33

    290 PRINT TABXY(1,18),"Current Accuracy Tests Complete" 300 END Performance Table 4-2, Performance Test Record for the HP E1328A DAC, can be used Test Record to record the results of each Operation Verification and Performance Verification test for the HP E1328A DAC (this record can be copied if desired).

  • Page 34

    Table 4-2. Performance Test Record for the HP E1328A DAC (Page 1 of 3) Test Facility: Name _____________________________________ Report No. __________________________________ Address _____________________________________ Date _______________________________________ City/State ___________________________________ Customer ___________________________________ Phone _____________________________________ Tested by __________________________________ Special Notes: ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________...

  • Page 35

    Table 4-2. Performance Test Record for the HP E1328A DAC (Page 2 of 3) Voltage Accuracy Measurements* Output Measured Value High Measurement Test Acc Value (V) Limit (V) Limit (V) Ratio (TAR) Uncertainty ( V) -10.00000 -10.14833 __________________ -9.85167 103.60 >10:1...

  • Page 36

    Table 4-2. Performance Test Record for the HP E1328A DAC (Page 3 of 3) Current Accuracy Measurements* Output Low Limit Measured Value High Limit Meas Uncert Test Acc Value (mA) (mA) (mA) (mA) Ratio (TAR) ( A) -20.00000 -20.29665 ________________ -19.70335...

  • Page 37: Voltage Adjustments, Introduction, Chapter 5. Adjustments

    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.

  • Page 38: Equipment Setup

    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.

  • Page 39: Adjustment Procedures, Example: Voltage Adjustments

    Procedures Set three jumpers on Channel 1 to the V position. Connect a 1 k resistor and HP 3458A to Channel 1 (see Figure 5-1). Set Channel 1 to non-calibrated mode with CAL1:STAT OFF. Set Channel 1 to minimum output (-12V) with VOLT1 MIN.

  • Page 40: Current Adjustments, Equipment Setup

    Figure 5-2. Be sure to set all three channel jumpers to the I (current) position. Set the HP 3458A to DCI function and set NPLC 100. Figure 5-6. Current Adjustment Connections...

  • Page 41: Example: Current Adjustments, Adjustment Procedures

    Procedures Set three jumpers on Channel 1 to the I position. Connect a 500 resistor and HP 3458A to Channel 1 (see Figure 5-2). Set Channel 1 to non-calibrated mode with CAL1:STAT OFF. Set Channel 1 to minimum output (-.024 A) with CURR1 MIN.

  • 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: Exchange Assemblies, Introduction, Ordering Information, Chapter 6. Replaceable Parts

    Chapter 6 Replaceable Parts Introduction This chapter contains information to order replaceable parts for the HP E1328A D/A Converter. Exchange Table 6-1 lists assemblies that may be replaced on an exchange basis (EXCHANGE ASSEMBLIES). Exchange, factory-repaired, and tested Assemblies assemblies are available only on a trade-in basis. Defective assemblies must be returned for credit.

  • Page 44: Replaceable Parts List

    Replaceable Table 6-1, HP E1328A Replaceable Parts, lists the replaceable parts for the Parts List 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* HP Part...

  • Page 45

    J ....electrical connector (jack) SHD ........... shield MNL ........manual SW ..........switch MP ....misc. mechanical part TB ......... terminal block Table 6-3. HP E1328A Code List of Manufacturers Manufacturer Name Address Code 00000 Any satisfactory supplier 06776...

  • Page 46

    Figure 6-7. HP E1328A DAC - Replaceable Parts 46 Replaceable Parts Chapter 6...

  • Page 47: Chapter 7. Manual Changes, Introduction

    Since this manual applies directly to instruments with serial numbers listed on the title page, change 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: Equipment Required, Introduction, Service Aids, Troubleshooting Techniques, Identifying The Problem, Chapter 8. Service

    DAC may be available through Hewlett-Packard. For information, contact your nearest Hewlett-Packard Sales and Service Office. Troubleshooting There are two main steps to trouble shoot an HP E1328A DAC problem: Techniques (1) identify the problem, and (2) test the DAC to isolate the cause to a user-replaceable component.

  • Page 50: Testing 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 information on possible SCPI command errors. Catastrophic Failure If a catastrophic failure occurs, see "Testing the DAC"...

  • Page 51

    Table 8-1. HP E1328A DAC Error Messages Title Potential Cause(s) -330 Self-Test Failure Module malfunction -240 Hardware Failure Module malfunction -221 Jumper Settings Channel’s V/I jumper in incorrect position 2801 Channel 1 current Channel 1 stored adjustment constant checksum error...

  • Page 52: Repair / Maintenance Guidelines, Esd Precautions

    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 / This section gives guidelines to repair and maintain the HP E1328A DAC, Maintenance including: Guidelines...

  • Page 53: Soldering Printed Circuit Boards, Post-repair Safety Checks

    CMOS devices. Post-Repair Safety After making repairs to the HP E1328A DAC, inspect the DAC for any signs of abnormal internally generated heat, such as discolored printed Checks circuit boards or components, damaged insulation, or evidence of arcing.

  • Page 54

    54 Service Chapter 8...

  • Page 55: Appendix A. Calculating D/a Converter Accuracy, Introduction

    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 values for the HP 3458A multimeter, and associated DAC test accuracy ratios (TARs).

  • Page 56: Dac Accuracy Calculations, Dc Voltage Accuracy Equations, Dc Current Accuracy Equations

    For the HP E1328A DAC performance verification tests, accuracy is Calculations 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...

  • Page 57: Hp 3458a Measurement Uncertainty Calculations, Calculate Dcv Measurement Uncertainty, Calculate Dci Measurement Uncertainty

    Limit value in Table 4-2 = 10.26165 mA and the Lower Limit value = 9.73835 mA. HP 3458A Measurement uncertainties for the HP 3458A multimeter are calculated Measurement using the 1-year accuracy specifications in Appendix A - Specifications of the HP 3458A Multimeter Operating, Programming, and Configuration...

  • Page 58: Test Accuracy Ratio (t A R) Calculations

    (42.0 x Reading + 6.0 x Range)] = [10 x (42.0 x .016 + 6.0 x .100)] = 1.272 x 10 1.272 A. Test Accuracy For the HP E1328A D/A Converter: Ratio (T A R) High Limit Output Calculations...

  • Page 59

    For an 8.0 V dc output, if the High Limit value = 8.14134 V and Measurement Uncertainty = 83.3 V, Test Accuracy Ratio (TAR) = (8.14134 V - 8.00000 V)/83.3 x 10 V = 1696.76. Since this value is > 10:1, the entry in Table 4-2 is "> 10:1". Appendix A Calculating D/A Converter Accuracy 59...

  • Page 60

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

  • Page 61: Verification Test Examples, Functional Verification Test, Example: Self Test

    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.

  • Page 62: Example: Positive Voltage Compliance

    "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"...

  • Page 63

    "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>...

  • Page 64

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

  • Page 65: Example: Voltage Accuracy Measurements, Performance Verification Tests

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

  • Page 66: 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. Accuracy Measurements /* Current Accuracy Measurements Test E1328A */ #include <stdio.h> #include <math.h> #include <sicl.h> #define ADDR "hpib7,9,9"...

  • Page 67

    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);...

  • Page 68: 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, Adjustments and 4. /* Voltage Adjustments E1328A */ #include <stdio.h> #include <sicl.h> #define ADDR "hpib7,9,9" /* Address of device */ void main () INST id;...

  • Page 69

    This program uses the measured minimum, default, and maximum values you enter to update the current adjustment constants for Channels 1, 2, 3, Adjustments and 4. /* Current Adjustments E1328A */ #include <stdio.h> #include <sicl.h> #define ADDR "hpib7,9,9" /* Address of device */ void main () INST id;...

  • Page 70

    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...

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