Keysight Technologies U1453A Service Manual
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Keysight Technologies U1453A Service Manual

Insulation testers and insulation multimeter, u1450 series
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Summary of Contents for Keysight Technologies U1453A

  • Page 1 Keysight U1450 Series Insulation Testers and U1461A Insulation Multimeter Service Guide...

  • Page 2: Safety Information

    IMPLIED, WITH REGARD TO THIS agreement and written consent from customarily provided to the public. MANUAL AND ANY INFORMATION Keysight Technologies as governed by Accordingly, Keysight provides the CONTAINED HEREIN, INCLUDING BUT United States and international Software to U.S. government NOT LIMITED TO THE IMPLIED copyright laws.

  • Page 3: Safety Symbols

    Safety Symbols The following symbols on the instrument and in the documentation indicate precautions which must be taken to maintain safe operation of the instrument. Direct current (DC) Caution, risk of electric shock Caution, risk of danger (refer to this Alternating current (AC) manual for specific Warning or Caution information)

  • Page 4: Safety Considerations

    Safety Considerations Read the information below before using this tester. The descriptions and instructions in this manual apply to the Keysight U1461A Insulation Multimeter and the U1450 Series Insulation Tester. The word tester is used to represent both models. – Do not use the tester if it is damaged. Before you use the tester, inspect WARNING the case.
  • Page 5 – Ensure that you do not perform insulation resistance tests in distribution WARNING systems with voltages higher than 600 V. – For insulation resistance tests, ensure that you select a suitable test voltage for the equipment to be tested. For model U1461A only: –...

  • Page 6: Environmental Conditions

    –20 °C or –40 °C. You should monitor the ambient temperature sensed by the tester. The tester is operational if the temperature display is not less than –20 °C or –40 °C, according to battery type. The U1461A Insulation Multimeter and U1453A Insulation Tester complies with NOTE the following safety and EMC requirements: –...

  • Page 7: Regulatory Markings

    Regulatory Markings The RCM mark is a registered The CE mark is a registered trademark of the Spectrum trademark of the European Management Agency of Australia. Community. This CE mark shows that This signifies compliance with the the product complies with all the Australia EMC Framework regulations relevant European Legal Directives.

  • Page 8: Waste Electrical And Electronic Equipment (Weee) Directive 2002/96/Ec

    Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC This instrument complies with the WEEE Directive (2002/96/EC) marking requirement. This affixed product label indicates that you must not discard this electrical or electronic product in domestic household waste. Product category: With reference to the equipment types in the WEEE directive Annex 1, this instrument is classified as a “Monitoring and Control Instrument”...

  • Page 9: Table Of Contents

    ....... .21 Performance verification tests for U1452A/U1452AT/U1451A ..21 Performance verification tests for U1461A/U1453A ... . .25 Calibration Security .
  • Page 10 Valid adjustment input values (U1461A) ..... 42 Adjustment procedure ........46 Non-Contact Voltage (NCV) Calibration .

  • Page 11: U1450 Series/U1461A Service Guide

    List of Figures Figure 1-1 Connecting the U1450 Series/U1461A to the M191 Figure 1-2 Connecting the U1450 Series/U1461A for 6 Ω EBR measurement ......30 U1450 Series/U1461A Service Guide...
  • Page 12 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. U1450 Series/U1461A Service Guide...
  • Page 13 ........36 Table 1-5 Adjustment input values (U1453A) ....38...
  • Page 14 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. U1450 Series/U1461A Service Guide...

  • Page 15: Recommended Test Equipment

    U1461A Insulation Multimeter/U1453A Insulation Tester Service Guide Calibration Procedures Calibration Overview Recommended Test Equipment Calibration Process Test Considerations Performance Verification Tests Calibration Security Unsecuring the Instrument for Calibration Using the Front Panel for Adjustments Calibration Count Calibration Error Codes...

  • Page 16: Calibration Procedures

    Calibration Procedures Calibration Overview This manual contains procedures to verify the U1450 Series insulation testers/ U1461A insulation multimeter performance and to perform adjustments (calibration). The performance test procedures allow you to verify that the instrument is operating within its published specifications. The adjustment procedures ensure that the instrument remains within its specifications until the next calibration.

  • Page 17: Adjustment Is Recommended

    Calibration Procedures Adjustment is recommended Specifications are only guaranteed within the period stated from the last adjustment. Keysight recommends that re-adjustment should be performed during the calibration process for best performance. This will ensure that the instrument will remain within the specifications until the next calibration interval. This criterion for the re-adjustment provides the best long-term stability.

  • Page 18: Recommended Test Equipment

    Calibration Procedures Recommended Test Equipment The test equipment recommended for the performance verification and adjustment procedures are listed below (Table 1-1). If the exact instrument is not available, substitute with another calibration standard of equivalent accuracy. A suggested alternative method is to use the Keysight 3458A 8½ Digit Digital Multimeter to measure less accurate but stable sources.

  • Page 19: Calibration Process

    Calibration Procedures Calibration Process 1 Prior to performing the verification tests, see “Test Considerations” page 20. 2 Perform the verification tests to characterize the instrument; see “Performance Verification Tests” on page 21. 3 Unsecure the instrument for calibration; see “Unsecuring the Instrument for Calibration”...

  • Page 20: Test Considerations

    Calibration Procedures Test Considerations For optimum performance, all procedures should comply with the following recommendations: – The performance verification test or adjustment should be performed under laboratory conditions where the ambient temperature can be controlled. – The instrument should be put under the laboratory environment for at least 1 hour.

  • Page 21: Performance Verification Tests

    Performance Verification Tests Use the performance verification tests to verify the measurement performance of the instrument. The performance verification tests use the instrument's specifications listed in the U1461A/U1453A User's Guide and the U1452A/ U1452AT/U1451A User’s Guide (available for download at www.keysight.com/ find/hhTechLib).

  • Page 22: Table 1-7 Table

    Calibration Procedures Table 1-2 Performance verification tests (U1452A/U1452AT/U1451A) (continued) Error from nominal 1 year 5520A/5522A Step Test function Range output U1451A U1452AT/U1452A 6 V, 45 Hz ±0.123 V ±0.123 V Turn the rotary switch to the position. 6 V, 400 Hz ±0.123 V ±0.123 V 60 V, 45 Hz...
  • Page 23 Calibration Procedures Table 1-2 Performance verification tests (U1452A/U1452AT/U1451A) (continued) Error from nominal 1 year 5520A/5522A Step Test function Range output U1451A U1452AT/U1452A Earth-Bond 60 Ω 60 Ω ±0.93 Ω ±0.63 Ω Resistance Turn the 600 Ω 600 Ω ±9.3 Ω ±6.3 Ω...
  • Page 24 Calibration Procedures Error from nominal 1 year Step Test function Range M191 output U1451A U1452AT U1452A Insulation 250 V, 6 MΩ 6 MΩ ±0.095 MΩ ±0.095 MΩ Resistance Turn the 250 V, 60 MΩ 60 MΩ ±0.95 MΩ ±0.95 MΩ rotary switch to the 250 V, 600 MΩ...

  • Page 25: Performance Verification Tests For U1461A/U1453A

    Calibration Procedures Performance verification tests for U1461A/U1453A Table 1-3 Performance verification tests for models U1461A/U1453A Error from nominal 1 year 5520A/5522A Step Test function Range output U1453A U1461A 6 μA 6 μA ±0.049 μA Turn the rotary switch to the position.
  • Page 26 Calibration Procedures Table 1-3 Performance verification tests for models U1461A/U1453A (continued) Error from nominal 1 year 5520A/5522A Step Test function Range output U1453A U1461A ±0.006 V ±0.006 V Turn the rotary switch to the position. 60 V 60 V ±0.06 V ±0.06 V...
  • Page 27 Calibration Procedures Table 1-3 Performance verification tests for models U1461A/U1453A (continued) Error from nominal 1 year 5520A/5522A Step Test function Range output U1453A U1461A ACmV 60 mV 60 mV, 65 Hz ±0.63 mV Turn the rotary switch to the position.
  • Page 28 Calibration Procedures Table 1-3 Performance verification tests for models U1461A/U1453A (continued) Error from nominal 1 year 5520A/5522A Step Test function Range output U1453A U1461A Earth-Bond 5.0 Ω 6 Ω ±0.045 Ω ±0.045 Ω Resistance Turn the 60 Ω ±0.32 Ω...
  • Page 29 Calibration Procedures Error from nominal 1 year Step Test function Range M191 output U1453A U1461A Insulation 100 V, 6 MΩ 6 MΩ ±0.095 MΩ ±0.095 MΩ Resistance Turn the 100 V, 60 MΩ 60 MΩ ±0.95 MΩ ±0.95 MΩ rotary switch to the 100 V, 600 MΩ...
  • Page 30 Calibration Procedures Figure 1-1 Connecting the U1450 Series/U1461A to the M191 Resistor 5 Ω Figure 1-2 Connecting the U1450 Series/U1461A for 6 Ω EBR measurement U1450 Series/U1461A Service Guide...

  • Page 31: Calibration Security

    Calibration Procedures Calibration Security The calibration security code prevents accidental or unauthorized adjustments to the instrument. When you first receive your instrument, it is secured. Before you can adjust the instrument, you must unsecure it by entering the correct security code (see “Unsecuring the Instrument for Calibration”...

  • Page 32: Unsecuring The Instrument For Calibration

    1 Power-on the instrument, and press the keys simultaneously for more than 1 second. The calibration security code entry is shown on the display. U1461A/U1453A U1452A/U1452AT/U1451A 2 Key in the default security code if you are unsecuring your instrument for the first time.

  • Page 33: To Change The Calibration Security Code

    5 Alternatively, press (for U1452A/U1452AT/U1451A) or press (for U1461A/U1453A) for more than 1 second to cancel the changes made. If the new calibration security code has been successfully stored, the display will show PASS. Record down your new calibration security code, and store it in a safe location.
  • Page 34 2 Power-on the instrument, and press simultaneously for more than 1 second. The calibration security code entry is shown on the display. U1461A/U1453A U1452A/U1452AT/U1451A 3 Press for more than 1 second. 4 Set the code to the same as the last four digits of the instrument’s serial number.

  • Page 35: Using The Front Panel For Adjustments

    Calibration Procedures Using the Front Panel for Adjustments This section describes the procedures to perform adjustments from the front panel. To unsecure the instrument, see “To unsecure the instrument from the front panel” on page 32. Once unsecured, the reference value will be indicated on the display. Adjustment considerations 1 Use the Fluke 5520A/5522A calibrator (or equivalent) for the adjustment procedure.

  • Page 36: Valid Adjustment Input Values (U1452A/U1452At/U1451A)

    Calibration Procedures Never turn off the instrument during an adjustment. This may delete the CAUTION calibration memory for the present function. Valid adjustment input values (U1452A/U1452AT/U1451A) Adjustment can be accomplished using the following input values below. Table 1-4 Adjustment input values (U1452A/U1452AT/U1451A) Test function sequence Step Reference value...

  • Page 37: Adjustment Input Values (U1452A/U1452At/ U1451A)

    Calibration Procedures Table 1-4 Adjustment input values (U1452A/U1452AT/U1451A) (continued) Test function sequence Step Reference value Valid reference input 3. DCA at Ω 6.000 μA 0.000 μA Turn the rotary switch to the position. 6.000 μA 3.000 μA 0.9 to 1.1 × Reference Value 60 μA 30.00 μA 0.9 to 1.1 ×...

  • Page 38: Valid Adjustment Input Values (U1453A)

    Calibration Procedures Valid adjustment input values (U1453A) Adjustment can be accomplished using the following input values. Table 1-5 Adjustment input values (U1453A) Test function sequence Step Reference value Valid reference input 1. DCV 600.00 mV 0.00 mV Turn the rotary switch to the position.

  • Page 39: Adjustment Input Values (U1453A)

    Calibration Procedures Table 1-5 Adjustment input values (U1453A) (continued) Test function sequence Step Reference value Valid reference input 2. ACV 300.00 mV (55 Hz) 0.9 to 1.1 × Reference Value Turn the rotary switch to the position. 300.00 mV (20 kHz) 0.9 to 1.1 ×...
  • Page 40 Calibration Procedures Table 1-5 Adjustment input values (U1453A) (continued) Test function sequence Step Reference value Valid reference input 6. Earth-Bond SHORT SHORT SHORT VΩ/COM Terminals Resistance Turn the rotary μA mA/COM Terminals Ω 6 μA 3.0000 μA switch to the position.
  • Page 41 Calibration Procedures Table 1-5 Adjustment input values (U1453A) (continued) Test function sequence Step Reference value Valid reference input 10. Capacitance OPEN OPEN OPEN Terminals While the rotary switch is in the 3.000 nF 0.9 to 1.1 × Reference Value 10.000 nF position, press thrice.

  • Page 42: Valid Adjustment Input Values (U1461A)

    Calibration Procedures Valid adjustment input values (U1461A) Adjustment can be accomplished using the following input values. Table 1-6 Adjustment input values (U1461A) Test function sequence Step Reference value Valid reference input 1. DCA OPEN OPEN OPEN Terminals Turn the rotary switch to the position.
  • Page 43 Calibration Procedures Table 1-6 Adjustment input values (U1461A) (continued) Test function sequence Step Reference value Valid reference input 5. ACV 300.00 mV (55 Hz) 0.9 to 1.1 × Reference Value Turn the rotary switch to the position. 300.00 mV (20 kHz) 0.9 to 1.1 ×...
  • Page 44 Calibration Procedures Table 1-6 Adjustment input values (U1461A) (continued) Test function sequence Step Reference value Valid reference input 7. ACA Turn the rotary switch 0.8 to 1.2 × Reference Value 0.3000 μA (55 Hz) 6.0000 μA to the position. 3.0000 μA (55 Hz) 0.9 to 1.1 ×...
  • Page 45 Calibration Procedures Table 1-6 Adjustment input values (U1461A) (continued) Test function sequence Step Reference value Valid reference input 10. Capacitance OPEN OPEN OPEN Terminals While the rotary switch is in the 3.000 nF 0.9 to 1.1 × Reference Value 10.000 nF position, press thrice.

  • Page 46: Adjustment Procedure

    Calibration Procedures Adjustment procedure Review the Test Considerations Adjustment considerations before beginning NOTE the adjustment procedures. 1 Turn the rotary switch to the respective test function position as shown in the adjustment input values table (Table 1-6). 2 Unsecure the instrument to enter the adjustment mode. (See “Unsecuring the Instrument for Calibration”...

  • Page 47: Non-Contact Voltage (Ncv) Calibration

    Calibration Procedures 9 Upon completion of each adjustment value, the display will show PASS. If the adjustment fails, the instrument will sound a long beep and the calibration error number is shown on the display. If the adjustment fails, check the input value, range, function, and entered NOTE adjustment value before repeating the adjustment steps.

  • Page 48: Exiting The Adjustment Mode

    Calibration Procedures 6 Press to start the calibration. If the tester passes the calibration then the display will indicate Lo.30 V. 7 Set the source to output to 30 V/55Hz. 8 Press to start the calibration. 9 When the calibration has been done, set the calibrator to the standby mode. Exiting the adjustment mode 1 Remove all the shorting plugs and connectors from the instrument.

  • Page 49: Calibration Count

    0. The calibration count can be read from the front panel after the instrument has been unsecured. 1 In adjustment mode, press to view the calibration count. U1461A/U1453A U1452A/U1452AT/U1451A Press Press 2 Take note of the calibration count to keep track of the number of calibrations that have been performed.

  • Page 50: Calibration Error Codes

    Calibration Procedures Calibration Error Codes The following errors indicate failures that may occur during a calibration. Table 1-7 Calibration error codes Code Descriptions 200/ER200 Calibration error: calibration mode is secured 002/ER002 Calibration error: secure code invalid 003/ER003 Calibration error: serial number code invalid 004/ER004 Calibration error: calibration aborted 005/ER005...
  • Page 51 U1461A Insulation Multimeter/U1453A Insulation Tester Service Guide Service and Maintenance Troubleshooting Fuse Replacement Returning the Instrument for Service Replaceable Parts Types of Service Available Obtaining Repair Service (Worldwide) This chapter will help you troubleshoot a failing instrument. It also describes how...

  • Page 52: Service And Maintenance

    Service and Maintenance Troubleshooting To avoid electrical shock, do not perform any servicing unless you are WARNING qualified to do so. Any repair or service which is not covered in this manual should only be CAUTION performed by qualified personnel. If the instrument fails to operate, check the batteries and the test leads.

  • Page 53: Fuse Replacement

    Service and Maintenance Fuse Replacement No recalibration is required after replacing the fuse. NOTE The current input and earth-bond resistance terminals of your tester are fuse protected. The fuses are located next to the battery compartment. The terminals are protected by a 10 × 35 mm 440 mA/1000 V 30 kA fast-acting fuse.
  • Page 54 Service and Maintenance 4 Lift the inner rubber cover to access the fuse compartment. 5 Locate the faulty fuse. Gently remove the defective fuse by prying one end of the fuse with a flathead screwdriver and removing it out of the fuse bracket.

  • Page 55: Returning The Instrument For Service

    Service and Maintenance Returning the Instrument for Service Before shipping your instrument for repair or replacement, Keysight recommends that you acquire the shipping instructions from the Keysight Service Center. A clear understanding of the shipping instructions is necessary to secure your product for shipment.

  • Page 56: Replaceable Parts

    Service and Maintenance Replaceable Parts This section contains information for ordering replacement parts for your instrument. You can find the instrument support parts list at Keysight's Test & Measurement Parts Catalog: http://www.keysight.com/find/parts The parts lists include a brief description of each part with its corresponding Keysight part number.

  • Page 57: Types Of Service Available

    Service and Maintenance Types of Service Available If your instrument fails during the warranty period, Keysight will repair or replace it under the terms of your warranty. After your warranty expires, Keysight offers repair services at competitive prices. Extended service contracts Many Keysight products are available with optional service contracts that extend the covered period after the standard warranty expires.

  • Page 58: Obtaining Repair Service (Worldwide)

    Service and Maintenance Obtaining Repair Service (Worldwide) To obtain service for your instrument (in-warranty, under service contract, or post-warranty), contact your nearest Keysight Service Center. They will arrange to have your unit repaired or replaced, and can provide warranty or repair-cost information where applicable.
  • Page 59 This information is subject to change without notice. Always refer to the Keysight website for the latest revision. © Keysight Technologies 2015-2017 Edition 5, June 30, 2017 Printed in Malaysia *U1451-90014* U1451-90014 www.keysight.com...

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U1461a

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