Keysight E1442A Service Manual
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Keysight E1442A Service Manual

Keysight E1442A Service Manual

4-channel form c switch module
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75000 Series C
Service Manual
Keysight E1442A 4-Channel
Form C Switch Module

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Summary of Contents for Keysight E1442A

  • Page 1 75000 Series C Service Manual Keysight E1442A 4-Channel Form C Switch Module...
  • Page 3 Warranty © Keysight Technologies, Inc. 2019 No part of this manual may be repro- To contact Keysight for sales and techni- THE MATERIAL CONTAINED IN THIS duced in any form or by any means cal support, refer to the support links on DOCUMENT IS PROVIDED “AS IS,”...
  • Page 6 In Case of Damage Cleaning Instruments that appear damaged or Clean the outside of the Keysight mod- defective should be made inoperative ule/chassis with a soft, lint-free, and secured against unintended oper- slightly dampened cloth. Do not use ation until they can be repaired by detergent or chemical solvents.
  • Page 7 Safety Symbols A CAUTION denotes a hazard. It calls attention to an operating pro- cedure or practice, that, if not cor- rectly performed or adhered to could result in damage to the product or loss of important data. Do not proceed beyond a CAUTION notice until the indicated condi- tions are fully understood and met.
  • Page 8 viii...

  • Page 9: Table Of Contents

    Test Accuracy Ratio (TAR)........32 Keysight E1442A Service Manual...
  • Page 10 Test 2-2: DC Isolation ......... . 58 Keysight E1442A Service Manual...

  • Page 11: General Information

    Inspection/Shipping later in this manual. Module Description The Keysight E1442A is a 64-channel Form C Relay Switch Module. This means it switches a common line to either the Normally Closed (NC) or Normally Open (NO) terminal. The module is a VXIbus C-size register-based slave device.

  • Page 12: Safety Information

    Safety Information The module is a Safety Class I instrument with a protective earth terminal when installed in an Keysight E1400 series mainframe. Check the mainframe and all related documentation for safety markings and instructions before operating or servicing the module.

  • Page 13: Recommended Test Equipment

    4-wire ohms Keysight 3458A or O, P, T 2-wire ohms (up to 1 GΩ) Keysight 34401A F = Functional Verification Tests, O = Operational Verification Tests, P=Performance Verification Tests, T = Troubleshooting Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 14: Schematic Diagram

    General Information Schematic Diagram Schematic Diagram Figure 1-2 shows the schematic diagram of the Keysight El442A 64-Channel Form C Switch Module. Note that with the standard terminal block, all lines of all relays are available. Figure 1-2 Keysight E1442A Schematic Diagram...

  • Page 15: Relay Life

    When the resistance exceeds a pre-determined value, the relay should be replaced. The end-of-life resistance recommended by Keysight Technologies can be found in Appendix A of the Keysight E1442A User’s Manual. Stability of Contact Resistance. The stability of the contact resistance decreases with age.
  • Page 16 General Information Relay Life Relays that wear out normally or fail due to misuse should not be considered defective and are not covered by the product’s warranty. Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 17: Verification Tests

    Keysight E1442A 64-Channel Form C Switch Module Service Guide Verification Tests Introduction The two levels of test procedures described in this chapter are used to verify that the relay module: – is fully functional (Functional Verification); – meets all testable specifications (Performance Verification).

  • Page 18: Test Fixture

    Test Fixture A test fixture is required for the Performance Verification tests. A test fixture can be manufactured from a standard Keysight E1442A solder-lug terminal module. It is recommended that you order an extra terminal module to use as a test fixture.
  • Page 19 Introduction Verification Tests Figure 2-1 Keysight E1442A Test Fixture Wiring Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 20: Functional Verification

    130 PRINT A 140 IF A <>0 THEN 150 REPEAT 160 OUTPUT 70915;"SYST:ERR?" 170 ENTER 70915;A,A$ 180 PRINT A,A$ 190 UNTIL NOT A 200 END IF 210 END A typical response is: Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 21: Self-Test Error Codes

    +ss03 Bad ID information in ID register. +ss10 Interrupt expected but not received. +ss11 Busy bit was not held ≈9 to 17 msec., ss = card number (with leading zero deleted) Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 22: Performance Verification

    Performance Verification The procedures in this section are used to test the module’s electrical performance using the specifications in Appendix A of the Keysight E1442A User’s Manual as the performance standards. These tests are suitable for incoming inspection, troubleshooting, and preventive maintenance.
  • Page 23 Record the contact resistance in the Performance Test Table at the end of this chapter. – Open that relay and close the next. Send OPEN (@01nn) to open the relay and then send CLOSE (@01nn) to close the next relay. Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 24: Com To Normally Closed (Nc) Lines Test

    Reading should indicate open circuit indicating all relays are open. 4. Sequentially OPEN each individual relay – Send OPEN (@01nn) to the module to open channel nn. nn has a range of 00 to 63. Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 25: Example: Closed Channel Resistance Test Program

    Example: Closed Channel Resistance Test Program This example performs the Closed-channel Resistance Test for the Keysight E1442A. This example can be used to test the High or Low lines of the module. 10 ! RE-STORE "E1442APERF" 20 ASSIGN @Sw TO 70915...
  • Page 26 710 PRINT "CHANNEL: ";I;" RESISTANCE IS OUT OF TOLERANCE. 720 PRINT "Press ’CONTINUE’ to proceed with test." 730 PAUSE 740 END IF NEXT Ch OUTPUT @Sw;"*RST" PRINT "End of COM to NC test. Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 27: Test 2-2: Dc Isolation

    2. Equipment Setup – Set DMM to: 2-wire ohms, 1G? range. – Send *RST to the module to open all relays. 3. DC Isolation Reading – Trigger the DMM and record the reading. Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 28: Nc/No/Com To Chassis

    Use any convenient chassis connection. The illustration shows the DMM LO terminal connected to the the outside of the TRIG OUT SMB on the Keysight E1406A Command Module. Figure 2-5 COM, HI, LO to Chassis DC Isolation Hardware Setup Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 29: Example: Dc Isolation Test Program

    320 PRINT "Connect DMM HI to relay module’s COM/NO/NC terminals." 330 PRINT "Connect DMM LO to mainframe chassis connection." 340 PRINT 350 PRINT "Press ’CONTINUE’ when ready to proceed." 360 PAUSE Keysight E1442A 64-Channel Form C Switch Module Service Guide...
  • Page 30 Verification Tests Performance Verification 370 OUTPUT @Dmm;"TRIG SGL" !Trigger DMM 380 ENTER @Dmm;Rdg 390 PRINT "COM/NO/NC to Chassis DC Isolation passes. ";Rdg;" ohms." 400 OUTPUT @Sw;"*RST" 410 END Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 31: Performance Test Record

    Test Limits Test limits are defined for closed-channel contact resistance and DC isolation using the specifications in Appendix A of the Keysight E1442A User’s Manual. The closed-channel resistance and DC isolation specifications are single-sided, (i.e., there is an upper limit or a lower limit, but not both). In the Performance Test Record, either the Minimum or Maximum column will be blank.

  • Page 32: Test Accuracy Ratio (Tar)

    Test Accuracy Ratios are not defined for single-sided measurements, so all closed-channel resistance and DC isolation measurements have ’NA’ (Not Applicable) in the TAR column. Table 2-3. Performance Test Record for Keysight E1442A (Page 1 of 5) Test Facility: ______________________________________________________ Name ________________________ Report No.
  • Page 33 Performance Test Record Verification Tests Table 2-3. Performance Test Record for Keysight E1442A (Page 2 of 5) Model ________________Report No. ________________Date _____________ Test Equipment Used: Model No. Trace No. Cal Due Date Description Keysight E1442A 64-Channel Form C Switch Module Service Guide...
  • Page 34 Verification Tests Performance Test Record Table 2-3. Performance Test Record for Keysight E1442A (Page 3 of 5) Model ________________Report No. ________________Date _____________ Channel Minimum COM to NO COM to NC Maximum Meas Uncert Reading Reading Test 2-1. Closed-channel Resistance Test (Values in ohms) ...
  • Page 35 Performance Test Record Verification Tests Table 2-3. Performance Test Record for Keysight E1442A (Page 4 of 5) Model ________________Report No. ________________Date _____________ Channel Minimum COM to NO COM to NC Maximum Meas Uncert Reading Reading Test 2-1. Closed-channel Resistance Test (Values in ohms) ...
  • Page 36 Verification Tests Performance Test Record Table 2-3. Performance Test Record for Keysight E1442A (Page 5 of 5) Test Description Minimum Reading Maximum Meas Uncert Test 2-2. DC Isolation Test (Values in ohms) 5E8  COM to NO 6.0E6 5E8 ...

  • Page 37: Replaceable Parts

    This chapter contains information for ordering replaceable parts for the Keysight E1442A 64 Channel Form C Switch Module. Ordering Information To order a part listed in this chapter, specify the Keysight Technologies part number and the quantity required. Send the order to your nearest Keysight Technologies Sales and Support Office.
  • Page 38 Screw - M2.5 x 0.45 12mm long Pan Head 28480 0515-0368 Screw - M2.5 x 0.45 6mm long Flat Head *SCR9-SCR10 0515-1375 28480 0515-1375 Screw - M2.5 x 0.45 11mm long Pan Head *SCR11-SCR12 0515-1968 28480 0515-1968 Keysight E1442A 64-Channel Form C Switch Module Service Guide...
  • Page 39 Replaceable Parts List Replaceable Parts Figure 3-1 Keysight E1442A Component Locater Keysight E1442A 64-Channel Form C Switch Module Service Guide...
  • Page 40 Replaceable Parts Replaceable Parts List Table 3-2 Keysight E1442A Terminal Module Assembly Replaceable Parts (for modules with serial numbers greater than US34000973) Reference Keysight Part Qty. Part Description Mfr. Mfr. Part Number Code Designator Number E1400-84405 Case Assembly - Terminal...
  • Page 41 Replaceable Parts List Replaceable Parts Figure 3-2 Keysight E1442A Terminal Module Assembly Keysight E1442A 64-Channel Form C Switch Module Service Guide...
  • Page 42 Replaceable Parts Replaceable Parts List Table 3-3 Keysight E1442A Terminal Module Assembly Replaceable Parts (for modules with serial numbers less thanUS34000972) Reference Keysight Part Qty. Part Description Mfr. Mfr. Part Number Code Designator Number 03852-01201 Clamp 28480 03852-01201 03852-86701 Pad - Clamp...
  • Page 43 Replaceable Parts List Replaceable Parts Figure 3-3 Keysight E1442A Terminal Module Assembly Table 3-4. Keysight E1442A 64-Channel Form C Switch Module Service Guide...
  • Page 44 Name Address Code 28480 Keysight Technologies - Corporate Palo Alto, CA 94304 Instrument Specialties Co. Inc. 30817 Del Water Gap, PA 18327 Elco Tool and Screw Corp. Rockford, IL 83486 61125 Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 45: Service

    T8 Torx driver to remove the front panel handles and a T10 Torx driver to remove the shields. Service Aids See Chapter 3 for descriptions and locations of Keysight E1442A replaceable parts. Service notes, manual updates, and service literature for the modules may be available through Keysight Technologies. For information, contact your nearest Keysight Technologies Sales and Support Office.
  • Page 46 (3.5 Ω), replace the entire module. Failing DC Isolation Test Check user wiring and test connections. (see Test 2-2 in Chapter 2). Remove dust from relay module and terminal module printed circuit boards. Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 47: Testing The Assembly

    Chapter 2. Replace any bad relays. Use Table 4-3 to determine the relay that corresponds to a failing channel. – Check connectors P1 and J1 for damage. If the preceding steps fail to isolate the problem, replace the module. Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 48: Matching Relays To Channels

    Service Troubleshooting Matching Relays to Channels Use Table 4-3 to find the reference designator of any relay on the Keysight E1442-66501 relay module. Table 4-3 Channel Relays/Reference Designators Channel Relay Channel Relay Channel Relay Channel Relay Component Component Component Component...
  • Page 49 Troubleshooting Service Figure 4-1 Keysight E1442A Relay Locations Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 50: Repair/ Maintenance Guidelines

    Service Repair/ Maintenance Guidelines Repair/ Maintenance Guidelines This section provides guidelines for repairing and maintaining the Keysight E1442A module, including: – ESD precautions – Soldering printed circuit boards – Post-repair safety checks ESD Precautions Electrostatic discharge (ESD) may damage static-sensitive devices in the multiplexer module.

  • Page 51: Incoming Inspection

    1. If the Keysight E1442A is damaged, contact Keysight Technologies and the carrier. 2. Install the Keysight E1442A in a VXI mainframe. Refer to the Keysight E1442A User’s Manual and the C-Size VXIbus Systems Configuration Guide for additional information.
  • Page 52 Service Incoming Inspection Keysight Technologies Keysight Technologies Keysight Technologies Figure 4-2 Packaging/Shipping Guidelines Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 53: A Verification Tests - C Programs

    Verification Tests - C Programs These examples assume a Relay Module logical address setting of 70915. If your Module has a different address, see the Keysight E1442A User’s Manual to change the logical address or change the program line #define ADDR "hpib7,9,15" to match your address setting.
  • Page 54 ("\n %s", a); if (a[1] != ’0’) ipromptf (id, "SYST:ERR?\n", "%t", a); printf ("\n %s", a); while (a[1] != ’0’); getchar(); /* Pause */ iclose (id); /* Close instrument session */ Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 55: Performance Verification Tests

    3.5?, the relay should be replaced. See Chapter 2 for hardware connections and equipment setup. /* Closed-channel Resistance Test E1442A This program performs the Closed Channel Resistance Test found in the E1442A Service Manual Program Rev. A.01.00 7/1/96 #include <stdio.h>...
  • Page 56 Turn Mainframe AND 3458a DMM power OFF."); printf ("\n 2. Connect GPIB Cable between mainframe and DMM."); printf ("\n 3. Install Keysight E1442A Component Assembly into Mainframe."); printf ("\n 4. Attach Test Fixture to Component Assembly."); printf ("\n 5. Turn Mainframe and DMM power ON");...
  • Page 57 ("\n***** Correct the problem before proceeding *****"); goto EXIT; for (channel = 0;channel <= 63; channel++) if (channel < 10) iprintf (id, "ROUT:OPEN (@010%u)\n", channel); else iprintf (id, "ROUT:OPEN (@01%u)\n", channel); Keysight E1442A 64-Channel Form C Switch Module Service Guide...

  • Page 58: Test 2-2: Dc Isolation

    This test verifies that sufficient DC isolation exists between various points on the relay module. See Chapter 2 for hardware connections and equipment setup. /* DC Isolation Test E1442A This program performs the DC Isolation Test found in the E1442A Service Manual Program Rev. A.01.00 7/1/96 #include <stdio.h>...
  • Page 59 = iopen (DMM); iprintf (dm, "PRESET NORM;TRIG HOLD\n"); iprintf (dm, "FUNC OHM;RANGE 1E9\n"); iprintf (id, "*RST\n"); printf ("\n\nConnect DMM HI and LO to E1442A NO and C lines"); getchar (); ipromptf (dm, "TRIG SGL\n", "%t", reading); printf ("\nDC Isolation -- Normally Open Channels to Common");...
  • Page 60 Verification Tests - C Programs Performance Verification Tests iclose (dm); Keysight E1442A 64-Channel Form C Switch Module Service Guide...
  • Page 62 This information is subject to change without notice. © Keysight Technologies, 2019 Printed in Malaysia Edition 3, October 2019 *E1442-90011* E1442-90011 www.keysight.com...

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