HP E1418A Service Manual
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HP E1418A Service Manual

HP E1418A Service Manual

8/16-channel d/a converter
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Click here to return to HP TS-5400 Systems On-Line Manuals Main Contents
Chapter 1, General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 2, Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Chapter 3, Operating Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Chapter 4, Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
HP E1418A 8/16-Channel D/A Converter Service Manual
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Module Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Module Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Module Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Ordering Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Field Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Terminal Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Preparation for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Prepare the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Prepare the Terminal Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Prepare the Command Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Shipping Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Querying Module Identification and Configuration . . . . . . . . . . . . . . . . . . 19
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Operator's Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Test Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
About the Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Functional Verification Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
HP E1418A 8/16-Channel D/A Converter Service Manual Contents
Contents
Edition 1
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Summary of Contents for HP E1418A

  • Page 1: Table Of Contents

    Edition 1 Click here to return to HP TS-5400 Systems On-Line Manuals Main Contents Warranty ......... . 5 WARNINGS .
  • Page 2 Assembly Exchange ........85 HP E1418A 8/16-Channel D/A Converter Service Manual Contents...
  • Page 3 Introduction ........93 Appendix A, HP E1418A Specifications ......95...
  • Page 4 Notes HP E1418A 8/16-Channel D/A Converter Service Manual Contents...

  • Page 5: Warranty

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

  • Page 6: Warnings

    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. HP E1418A D/A Converter Module Service Manual...

  • Page 7: Declaration Of Conformity

    Supplementary Information: The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC (inclusive 93/68/EEC) and carries the "CE" marking accordingly. Tested in a typical configuration in an HP C-size VXI mainframe. November 6, 1995...
  • Page 8 Notes HP E1418A D/A Converter Module Service Manual...

  • Page 9: Chapter 1, General Information

    General Information Introduction This manual contains information required to test, troubleshoot, and repair the HP E1418A 8/16 Channel D/A Converter Module. See the HP E1418A User’s Manual for additional module information. Figure 1-1 shows the HP E1418A module. Figure 1-1. HP E1418A D/A Converter Module...

  • Page 10: Warnings And Cautions

    Warnings and This section contains WARNINGS which must be followed for your protection and CAUTIONS which must be followed to avoid damage Cautions to the equipment when performing instrument maintenance or repair. WARNING 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.
  • Page 11 WARNING 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). CAPACITOR VOLTAGES. Capacitors inside the mainframe may remain charged even when the mainframe has been disconnected from its source of supply.

  • Page 12: Module Description

    Module Description The HP E1418A is an 8 or 16 channel digital-to-analog converter module for use in a VXIbus C-size mainframe. The module is a register based device. The module can be programmed via direct register access or, with the appropriate driver, by high level commands. This manual describes programming the module using SCPI (Standard Commands for Programmable Instruments) and the SCPI driver.

  • Page 13: Ordering Options

    8-channel module. Terminal Modules The standard HP E1418A Terminal Module provides screw terminals for connections. Two other terminal options are available with the HP E1418A: Crimp and Insert (Option A3E) Ribbon Cable (Option A3H) Chapter 1...

  • Page 14: Recommended Test Equipment

    F,O,P,T IEEE Standard 488-1988 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 the HP E1418A E1400B/T, F,O,P,T E1401A/T, or E1401B Command Compatible with Module...

  • Page 15: Chapter 2, Installation

    Chapter 2 Installation Introduction This chapter contains the following topics: Initial Inspection Preparation for Use Environment Shipping Guidelines Initial Inspection 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 module has been checked mechanically and electrically.

  • Page 16: Preparation For Use

    Installing Device Drivers installation note to prepare the mainframe. Prepare the Module Verify or set the module’s logical address. Refer to the HP E1418A User’s Manual for instructions. In this manual the factory default logical address of 72 is used.

  • Page 17: Prepare The Command Module

    With no jumpers installed, the module will be in the Program Selectable output mode. If you are using a terminal module dedicated to testing the HP E1418A, you can remove all the jumpers or put the jumpers in the storage position.

  • Page 18: Environment

    Shipping Guidelines If you need to return the HP E1418A to Hewlett-Packard, first remove any terminal modules before packaging for shipment. Attach a tag to the module identifying the owner and indicating the service or repair required. Mark the shipping container “...

  • Page 19: Chapter 3, Operating Information

    This chapter provides operating information, preventive maintenance instructions, and operators checks. Operation The HP E1418A User’s Guide is your reference for module operation. The User’s Guide contains information about module setup, application examples, and a complete SCPI command reference. Querying Module This example will query the module for the identification string and determine the module configuration.
  • Page 20 The module configuration is obtained using the DIAGnostic:CONFiguration? query. /* Send query to the module*/ DIAG:CONF? /* Enter six integers and decode the integers*/ The DIAG:CONF? query returns six integers. The six integers returned contain the module configuration and have the following meaning. Integer Returned Meaning...
  • Page 21 For example, if the following six integers are returned, the module has the configuration indicated. Integer Decimal Configuration Value No expansion board installed (Only channels 1 through 8) No Terminal Module installed or unknown terminal module installed All channels are non-isolated All channels are voltage output channels All channel outputs are disabled (all output relays are open)
  • Page 22 /* First integer */ result=config[0]; /* Expansion board if (result == 0) printf (“Module is a 16 channel device\n”); num_chan = 16; else if (result == 7) printf (“Module is an 8 channel device\n”); num_chan=8; else printf (“Error in DIAG:CONF ? command\n”); printf (“First value returned was %d \n”,config[0]);...
  • Page 23 /* Third integer */ result=config[2]; /* Isolated or non-isolated outputs */ if (num_chan == 8) result = result << 8; /* strip upper 8 bits */ for (i=num_chan;i>0;i— ) if (result > = 0x8000) printf (“Channel %d is configured for non-isolated output\n”,i); else printf(“Channel %d is configured for isolated output\n”,i);...
  • Page 24 /* Fifth integer */ result=config[4]; /* Channel output ON or OFF */ if (num_chan == 8) result = result << 8; /* strip upper 8 bits */ for (i=num_chan;i>0;i— ) if (result > = 0x8000) printf (“Channel %d output is disabled\n”,i); else printf(“Channel %d output is enabled\n”,i);...

  • Page 25: Preventive Maintenance

    Preventive Maintenance Preventive maintenance consists of periodically cleaning the front panel, the terminal module, and performing the Operator’s Check. Clean the module and terminal module yearly, or more often if the module is used in very dusty or humid areas. Disassembly of the module is not recommended for cleaning.

  • Page 26: Cleaning Procedure

    Cleaning Procedure Use the following procedure to clean the HP E1418A. Terminal Module Remove the terminal module from the main module. Disconnect all external wiring. Clean the terminal module covers with a mild soap solution and lint-free cloth. Remove the terminal module cover and blow any dust or debris from the case.

  • Page 27: Operator's Checks

    Operator’s Checks The operator’s check for the HP E1418A has two parts. The first part consists of sending the SYStem:ERRor? query to the module following power-on and entering the response. This check should be performed after every power-on sequence. At power-on, the HP E1418A performs a brief self-test that ensures the module can communicate with the backplane.
  • Page 28 if(err VI_SUCCESS) err_handler(dac, err); if (selftest != ’0’) printf (“Self Test failed\n”); printf (“The first error encountered was\n”); printf (“Error number %d %s\n”,selftest,selftestresults); printf (“This program will terminate\n”); pause(); abort; else printf (“Self Test PASSED”); /*** VTL Error handling function ***/ void err_handler (ViSession dac, ViStatus err) char buf[1024]={0};...

  • Page 29: Chapter 4, Verification Tests

    Three test procedures are given in this chapter. These test procedures are used to verify that: the HP E1418A is functional (Functional Verification) the HP E1418A meets selected testable specifications (Quick Verification) the HP E1418A meets all testable specifications (Performance Verification)

  • Page 30: About The Verification Tests

    About the Verification Tests Three levels of verification tests are described in this chapter: Functional Verification Tests Quick Verification Tests Performance Verification Tests You should perform the Functional Verification test before either the Quick Verification or full Performance Verification tests. Functional The Functional Verification test provides a high confidence that the module is operational.

  • Page 31: Performance Verification Tests

    In the examples, the Hewlett-Packard VISA Transition Library is used for I/O operations with the VXIbus. A Hewlett-Packard command module (HP E1405/E1406) is used and controlled via HP-IB. To use the Hewlett-Packard VISA Transition Library (abbreviated as VTL), include the visa.h header file.
  • Page 32 SCPI driver and HP E1406A Command Module. The HP E1418A module is shipped with two 3.5" disks. These disks contain the SCPI driver for the HP E1406A Command Module. One disk is in LIF format and one disk is in DOS format. Installing Device Drivers Installation Note is included with the disks.

  • Page 33: Functional Verification Test

    Functional Verification Test The Functional Verification Test quickly verifies that the module is operational. Perform this test any time to verify or check the operation. Perform this test before beginning any Quick Verification or Performance Verification Tests. Functional Use the following procedure to verify the module’s operation. Verification Test Install the module in the mainframe and apply power.

  • Page 34: Performance Verification Tests

    Performance Verification Tests These procedures test the electrical performance of the HP E1418A using the specification in Appendix A as the performance standards. These tests are suitable for incoming inspections, troubleshooting, and preventive measures. DC Voltage Output This procedure tests the dc voltage output performance of the module.

  • Page 35: Dc Voltage Compliance Current

    Open the channel output relay by sending the OUTPut n OFF command, where n is the channel number. Change the connections to the next channel and repeat steps 2, 3, and 4. Repeat steps 2, 3, 4, and 5 for each channel. DC Voltage This test checks the compliance current in dc voltage.

  • Page 36: Dc Voltage Short Circuit Output Current

    DC Voltage Short This test checks the short circuit output current for each channel. Circuit Output For each channel in the module, connect the DMM as shown in Current Figure 4-3. Channel 1 connections are shown in the figure. Connect the other channels in a similar manner.

  • Page 37: Dc Current Verification

    DC Current This test checks the dc current output performance of the module. Verification For each channel in the module, connect the DMM as shown in Figure 4-4. Channel 1 connections are shown in the figure. Connect the other channels in a similar manner. Set the DMM to measure dc current.

  • Page 38: Performance Verification Tests Example

    Performance This example demonstrates a full performance verification test of the module. The code shown in this example can be obtained from the file Verification Tests prftest.c on the examples disk provided with this manual. Example /** FUNCTION PROTOTYPES **/ void main (void);...
  • Page 39 (“3.\tThe DMM is set to make DC Volts Measurements on \n”); printf (“\tthe 100 V range.\n”); printf (“4.\tFor each channel in the HP E1418A,\n”); printf (“\t\tOutput 16 V, 12 V, 8 V, 4 V, 0 V, -4 V, -8 V, -12 V, -16 V.\n”);...
  • Page 40 /*** Routine to perform the compliance current performance test ***/ void compliance_check () float v_out = {12}; /* Voltage to output */ int i,opc_check; char function [6] = {“VOLT:DC\0"},range [6] = {”100\0"}; dmm_setup (function,range); printf (“\n\nCompliance Current Verification Test\n\n”); for (i = 0;i != num_chan;i++) /** connection instructions **/ printf (“\tChannel %d\n”,i+1);...
  • Page 41 /*** Routine to perform the short circuit output current performance test ***/ void maxcurrent_check () float v_out = {16}; /*voltage to output*/ int i,opc_check; char function [6] = {“CURR:DC\0"},range [6] = {”0.100\0"}; dmm_setup (function,range); printf (“\n\nShort Circuit Output Current Verification Test\n\n”); for (i = 0;i != num_chan;i++) /** connection instructions **/ printf (“\tChannel %d\n”,i+1);...
  • Page 42 (“2.\tThe DMM is set to make DC current measurements on \n”); printf (“\tthe 100 mA range.\n”); printf (“3.\tFor each channel in the HP E1418A,\n”); printf (“\t\tOutput 20 mA, 15 mA, 10 mA, 5 mA, 0 mA, -5 mA, -10 mA, -15 mA, -20 mA.\n”);...

  • Page 43: Performance Test Record

    Performance Test Record Table 4-1 is a form you can copy and use to record the performance verification test results of the HP E1418A. This table shows the output accuracy, measurement uncertainty, and the test accuracy ratio (TAR) values. The test marked with a “ Q” in the table are the Quick Verification Tests.

  • Page 44: Test Accuracy Ratio (Tar)

    M.U. = (0.000018 + 0.000005) = 0.000023 A Current Output The 100 mA range is used for the current output measurements. Measurements M.U. = (0.030% of reading + 0.005% of range) HP E1418A % of reading % of range Measurement Output Uncertainty + 0.020 A...
  • Page 45 Table 4-1. Performance Test Record Test Facility: Name Report No. Address Date City/State Customer Phone Tested by Model HP E1418A Ambient Temperature Serial No. Relative Humidity Options Firmware Rev Notes: Test Equipment Used Model Trace Number Cal Due Date Chapter 4...
  • Page 46 Quick Channel E1418A Measured M.U. Check Output Voltage Output Check +16.000 V +15.989 V __________ +16.011 V 1.16E-3 V 9.5:1 +12.000 V +11.991 V __________ +12.009 V 1.02E-3 V 8.8:1 +8.000 V +7.993 V __________ +8.007 V 8.80E-4 V 7.9:1 +4.000 V...
  • Page 47 Quick Channel E1418A Measured M.U. Check Output +16.000 V +15.989 V __________ +16.011 V 1.16E-3 V 9.5:1 +12.000 V +11.991 V __________ +12.009 V 1.02E-3 V 8.8:1 +8.000 V +7.993 V __________ +8.007 V 8.80E-4 V 7.9:1 +4.000 V +3.995 V __________ +4.005 V...
  • Page 48 Quick Channel E1418A Measured M.U. Check Output +16.000 V +15.989 V __________ +16.011 V 1.16E-3 V 9.5:1 +12.000 V +11.991 V __________ +12.009 V 1.02E-3 V 8.8:1 +8.000 V +7.993 V __________ +8.007 V 8.80E-4 V 7.9:1 +4.000 V +3.995 V __________ +4.005 V...
  • Page 49 Quick Channel E1418A Measured M.U. Check Output +16.000 V +15.989 V __________ +16.011 V 1.16E-3 V 9.5:1 +12.000 V +11.991 V __________ +12.009 V 1.02E-3 V 8.8:1 +8.000 V +7.993 V __________ +8.007 V 8.80E-4 V 7.9:1 +4.000 V +3.995 V __________ +4.005 V...
  • Page 50 Quick Channel E1418A Measured M.U. Check Output +16.000 V +15.989 V __________ +16.011 V 1.16E-3 V 9.5:1 +12.000 V +11.991 V __________ +12.009 V 1.02E-3 V 8.8:1 +8.000 V +7.993 V __________ +8.007 V 8.80E-4 V 7.9:1 +4.000 V +3.995 V __________ +4.005 V...
  • Page 51 Quick Channel E1418A Measured M.U. Check Output +16.000 V +15.989 V __________ +16.011 V 1.16E-3 V 9.5:1 +12.000 V +11.991 V __________ +12.009 V 1.02E-3 V 8.8:1 +8.000 V +7.993 V __________ +8.007 V 8.80E-4 V 7.9:1 +4.000 V +3.995 V __________ +4.005 V...
  • Page 52 Quick Channel E1418A Measured M.U. Check Output DC Voltage Short Circuit Current Check +16.000 V __________ 0.060 A 2.3E-5 A +16.000 V __________ 0.060 A 2.3E-5 A +16.000 V __________ 0.060 A 2.3E-5 A +16.000 V __________ 0.060 A 2.3E-5 A +16.000 V...
  • Page 53 Quick Channel E1418A Measured M.U. Check Output +0.02000 A +0.019977 A __________ +0.020023 A 1.10E-5 A 2.1:1 +0.01500 A +0.0149815 A __________ +0.0150185 A 9.50E-6 A 1.9:1 +0.01000 A +0.009986 A __________ +0.010014 A 8.00E-6 A 1.7:1 +0.00500 A +0.0049905 A __________ +0.0050095 A 6.50E-6 A...
  • Page 54 Quick Channel E1418A Measured M.U. Check Output +0.02000 A +0.019977 A __________ +0.020023 A 1.10E-5 A 2.1:1 +0.01500 A +0.0149815 A __________ +0.0150185 A 9.50E-6 A 1.9:1 +0.01000 A +0.009986 A __________ +0.010014 A 8.00E-6 A 1.7:1 +0.00500 A +0.0049905 A __________ +0.0050095 A 6.50E-6 A...
  • Page 55 Quick Channel E1418A Measured M.U. Check Output +0.02000 A +0.019977 A __________ +0.020023 A 1.10E-5 A 2.1:1 +0.01500 A +0.0149815 A __________ +0.0150185 A 9.50E-6 A 1.9:1 +0.01000 A +0.009986 A __________ +0.010014 A 8.00E-6 A 1.7:1 +0.00500 A +0.0049905 A __________ +0.0050095 A 6.50E-6 A...
  • Page 56 Quick Channel E1418A Measured M.U. Check Output +0.02000 A +0.019977 A __________ +0.020023 A 1.10E-5 A 2.1:1 +0.01500 A +0.0149815 A __________ +0.0150185 A 9.50E-6 A 1.9:1 +0.01000 A +0.009986 A __________ +0.010014 A 8.00E-6 A 1.7:1 +0.00500 A +0.0049905 A __________ +0.0050095 A 6.50E-6 A...
  • Page 57 Quick Channel E1418A Measured M.U. Check Output +0.02000 A +0.019977 A __________ +0.020023 A 1.10E-5 A 2.1:1 +0.01500 A +0.0149815 A __________ +0.0150185 A 9.50E-6 A 1.9:1 +0.01000 A +0.009986 A __________ +0.010014 A 8.00E-6 A 1.7:1 +0.00500 A +0.0049905 A __________ +0.0050095 A 6.50E-6 A...
  • Page 58 Notes 58 Verification Tests Chapter 4...

  • Page 59: Chapter 5, Adjustments

    Introduction This chapter contains procedures for adjusting the calibration constants in the HP E1418A. Run the Performance Tests (described on Chapter 4) before any adjustments to characterize the module. Run the Performance Tests after any adjustments to verify the adjustments made. The module should be adjusted following any reconfiguration or repair.

  • Page 60: Closed-Cover Electronic Calibration

    Closed-Cover The HP E1418A features closed-cover electronic calibration. There are no internal mechanical adjustments. Once properly installed, the module can be Electronic tested and adjusted using connections to a terminal module. Calibration WARNING Do not perform any of the following adjustment procedures...

  • Page 61: Making Connections

    Making Connections All adjustments can be performed using the CAL output terminals. The CAL output terminals provide one set of connections for both voltage and current adjustment. Procedures in this chapter assume connections are made at the CAL output terminals on the screw-type terminal module. Note For demanding applications or for adjustment using the intended load, you can perform the adjustment at each channel output (to include the output...

  • Page 62: Adjustment Procedure

    Adjustment Procedure Adjustment is performed on each channel, one at a time. Voltage output and current output each use unique calibration constants. Preparation Before performing any adjustments, determine if the adjustments are to be temporary or permanent (refer to the discussion on page 60). If Permanent Turn off the mainframe.

  • Page 63: Voltage Adjustment

    Voltage Adjustment Voltage output adjustment uses two of the CALibration subsystem queries. CALibrationn:CONFigure:VOLTage? CALibrationn:VALue:VOLTage? <value> The general procedure for channel voltage adjustment is: Make the connections shown in figure 5-3 or 5-4. Send the CAL n :CONF:VOLT? query to the module and read the response until a 1 is returned (typically the first query response).
  • Page 64 Figure 5-3. Voltage Adjustment Connections (CAL) Figure 5-4. Optional Voltage Adjustment Connections 64 Adjustments Chapter 5...

  • Page 65: Current Adjustment

    Current Adjustment Current output uses an internal resistance value to calibrate all channels. This resistance value is approximately 244 .. The current is output adjusted by measuring the voltage developed across this resistor. Note You may also, optionally, use an external resistance value (or load) on each channel for current output and calibration.
  • Page 66 Figure 5-5. Internal Resistor Adjustment Connections 66 Adjustments Chapter 5...
  • Page 67 Current output adjustment uses two of the CALibration subsystem queries. Current adjustment requires voltage measurements. CALibrationn:CONFigure:CURRent? CALibrationn:VALue:CURRent? <value> Note The current adjustment procedure measures and inputs a voltage value developed across a known resistor value (set at the start of the procedure). Once the calibration resistance value is set as described earlier, the general procedure for each channel current output adjustment is: Make the connections shown in figure 5-6 or 5-7.
  • Page 68 Figure 5-6. Current Adjustment Connections (CAL) Figure 5-7. Optional Current Adjustment Connections 68 Adjustments Chapter 5...

  • Page 69: Storing The Adjustments

    The following program, written in ANSI C illustrates a full calibration of all channels for both voltage and current. The internal calibration resistor is used. The disk provided with this manual contains a calibration example file. This example uses function calls to the HP VISA Transition Library for I/O operations. Chapter 5...
  • Page 70 /** FUNCTION PROTOTYPES **/ void main (void); void err_handler(ViSession vi, ViStatus x); /* VTL error routine void sys_err(ViSession resource); /* Checks for SCPI programming errors */ void pause(); /* Waits for a keystroke to continue program execution */ int config_check (); /* Checks and reports the module configuration */ /* returns the number of channels in module float get_voltage ();...
  • Page 71 if(err < VI_SUCCESS) err_handler(dac, err); err=viScanf(dac, “%d”, &result); /* Enter integer returned /* returns a 0 when calibration complete */ if(err < VI_SUCCESS) err_handler(dac, err); if (result == 5) /* Calibration for this channel aborted printf (“Calibration for channel %d aborted\n”,i); result = 0;...
  • Page 72 /*** channel current output adjustment ***/ for (i=1;i<num_chan+1;i++) result = 0; while (result != 1) err=viPrintf(dac, “CAL%d:CONF:CURR? \n”,i); /* Configure for calibration */ if(err < VI_SUCCESS) err_handler(dac, err); err=viScanf(dac, “%d”, &result); /* Enter integer returned /*, returns a 1 when ready to calibrate */ if(err <...

  • Page 73: Chapter 6, Service

    Required The HP E1418A uses Torx head screws. To avoid damage to the screw head slots, use only a Torx driver for disassembly and assembly. You will need a T10 Torx driver (HP Part Number 8710-1284).

  • Page 74: Troubleshooting

    90. Self-Test The internal self-test can be used to isolate most failures of the module. The major assemblies of the HP E1418A are available on an exchange basis. Use the following SCPI Common Command query to initiate a module self-test.
  • Page 75 TEST:TST:RES? /*Enter an array of 100 integers*/ The integers returned from the self test query have the form: Test Number Test Information General Self-Test The test number returned by the *TST? query can be used to isolate a failing assembly. The possible test numbers and probable failing assembly are shown below.
  • Page 76 Detailed Self-Test Following the *TST? query, the TEST:TST:RESults? query returns complete self-test details. The following table lists each self-test and the areas checked. Test Number A24 Value Test Information Areas Checked Value If Failed Relay Control Register A/D multiplexer 2 through 17 Channel Number First DAC check of each channel 0 for A16 read...
  • Page 77 Test Number A24 Value Test Information Areas Checked Value If Failed Register Value Interrupt Control Register 1 through 5 Interrupt Status Register, SW Trigger Register, and trig ignored bit 44 through 59 1 through 5 Voltage mode, Set the Gain/Offset Register to nominal and 5 incrementing (Test 44 = Ch 1 values, read the values in the...

  • Page 78: Single Channel Failures

    Single Channel A single channel failure, not caught by the self-test, can be caused by one of two components: the channel plug-on module or the channel output relay. Failures To help isolate a plug-on module, disassemble the module and swap two plug-on modules.

  • Page 79: Repair/Maintenance Guidelines

    Use only anti-static solder suckers, soldering irons, and tools. Keep replacement parts in original static-free packaging. Surface Mount The HP E1418A uses surface mount components. Surface mount components should only be removed using soldering irons or desoldering Repair stations expressly designed for surfacemount components. Use of...

  • Page 80: Disassembly

    Remove the T-10 Torx screw holding the sheet metal spacer or expansion board. If the HP E1418A is an 8 channel device, lift the sheet metal spacer off the main board. If the HP E1418A is a 16 channel device, carefully separate the expansion board and main board printed circuit assemblies.
  • Page 81 Figure 6-1. 8-Channel Disassembly Chapter 6 Service 81...
  • Page 82 Figure 6-2. 16-Channel Disassembly 82 Service Chapter 6...
  • Page 83 Figure 6-3. Plug-on Channel Locations Figure 6-4. Installing Plug-on Modules Chapter 6 Service 83...
  • Page 84 Notes 84 Service Chapter 6...

  • Page 85: Chapter 7, Replaceable Parts

    Chapter 7 Replaceable Parts Introduction This chapter contains the following topics: Assembly Exchange Ordering Information Replaceable Parts Assembly Exchange The following assemblies are available for exchange. Part number Assembly E1418-69201 Main board and all sheet metal. Does NOT include plug-on assemblies or expansion board. E1418-69502 Expansion board.

  • Page 86: To Exchange An Assembly

    CAUTION Almost all electrical components can be damaged by electrostatic discharge (ESD) during handling. Component damage can occur at electrostatic discharge voltages as low as 50 volts. Disassemble and re-configure only in a static free work area. Minimize handling of assemblies and components.
  • Page 87 Table 7-1. HP E1418A Exchange/Replaceable Assemblies Description Reference Designator Exchange Part Number Part Number Main board and sheet metal. E1418-69201 E1418-66501 Does NOT include plug-on assembles or expansion board. Expansion Board. Does NOT E1418-69502 E1418-66502 include plug-on assemblies. Isolated Plug-On Assembly...
  • Page 88 Table 7-3. Terminal Module Replaceable Parts Reference HP Part Description Mfr Code Mfr Part Designator Number Number Terminal Module - Common Parts (see page 91) E1400-84405 Case Assembly-Term Lexus 24840 E1400-84405 MP1-2 1390-1027 Receptical Quick Fastener 24840 1390-1027 1460-2552 Torsion Spring Left Hand...
  • Page 89 Miscellaneous Mechanical Part Electrical Connector Printed Circuit Assembly Printed Circuit Board Panel Screw Shield Removable Jumper Table 7-5. HP E1418A Code List of Manufacturers Mfr. Manufacturer’s Name Manufacturer’s Address Zip Code Code 00000 Any suitable supplier may be used 04703 Little Fuse Inc.
  • Page 90 Figure 7-1. HP E1418A Replaceable Parts 90 Replaceable Parts Chapter 7...
  • Page 91 Figure 7-2. Common Terminal Module Replaceable Parts Chapter 7 Replaceable Parts 91...
  • Page 92 Figure 7-3. Standard Terminal Module Replaceable Parts Figure 7-4. Options A3E and A3H Replaceable Parts 92 Replaceable Parts Chapter 7...

  • Page 93: Chapter 8, Manual Changes

    Chapter 8 Manual Changes Introduction This chapter contains information to adapt this manual to modules for which the content does not directly apply. This manual applies to all modules. Change information is not required. Chapter 8 Manual Changes 93...
  • Page 94 Notes 94 Manual Changes Chapter 8...

  • Page 95: Appendix A, Hp E1418A Specifications

    90 day: (0.09% + 5.0 A) Output Voltage: Compliance Voltage: 12 V Maximum Open Circuit Voltage: < 18 V Differential Ripple and Noise: < 2 A rms, 20 Hz to 250 kHz into a 250 load Appendix A HP E1418A Specifications 95...
  • Page 96 1.60 0.01 0.00 0.00 Isolated Cooling Requirements For a 10 C rise Air Flow Avg Watts/slot 8 Channel configurations 2.0 liters/second 0.10 mm H 25.4 16 Channel configurations 3.9 liters/second 0.18 mm H 49.0 96 HP E1418A Specifications Appendix A...

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