Keysight Technologies U1450 Series Service Manual
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Keysight Technologies U1450 Series Service Manual

Insulation testers and insulation multimeter
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Keysight U1450 Series
Insulation Testers and
U1461A Insulation
Multimeter
Service
Guide

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Summary of Contents for Keysight Technologies U1450 Series

  • Page 1 Keysight U1450 Series Insulation Testers and U1461A Insulation Multimeter Service Guide...
  • Page 4 FAR 12.211 (Technical Data) and 12.212 (Computer Software) and, for the Department of Defense, DFARS 252.227-7015 (Technical Data - Commercial Items) and DFARS 227.7202-3 (Rights in Commercial Computer Software or Com- puter Software Documentation). U1450 Series/U1461A Service Guide...

  • Page 5: Safety Symbols

    Category IV 600 V overvoltage CAT IV Earth (ground) terminal 600 V protection Equipment protected throughout Do not use in distribution systems by double insulation or reinforced with voltages higher than 600 V insulation U1450 Series/U1461A Service Guide...

  • Page 6: 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 the case.
  • Page 7 Please remember to remove the batteries when the tester is not in use for a long period of time. Warning on the risk of battery leakage. For model U1461A only: • Never measure voltage when current measurement is selected. U1450 Series/U1461A Service Guide...

  • Page 8: Environmental Conditions

    • Designed in compliance to IEC/EN 61010-1:2010 for Category III 1000 V and Category IV 600 V • Designed in compliance to IEC/EN 61557-1, IEC/EN 61557-2, and IEC/EN 61557-4 • EMC compliance • Commercial limits compliance with IEC 61326-1:2005/EN 61326-1:2006 U1450 Series/U1461A Service Guide...
  • Page 9 The CSA mark is a registered substance elements are expected to trademark of the Canadian Standards leak or deteriorate during normal use. Association. Forty years is the expected useful life of the product. U1450 Series/U1461A Service Guide...
  • Page 10 “Monitoring and Control Instrument” product. The affixed product label is as shown below. Do not dispose in domestic household waste. To return this unwanted instrument, contact your nearest Keysight Service Center, or visit www.keysight.com/environment/product for more information. VIII U1450 Series/U1461A Service Guide...
  • Page 11 The Declaration of Conformity (DoC) for this instrument is available on the Keysight website. You can search the DoC by its product model or description at: http://regulations.products.keysight.com/DoC/search.htm If you are unable to search for the respective DoC, please contact your local Keysight N O T E representative. U1450 Series/U1461A Service Guide...
  • Page 12 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. U1450 Series/U1461A Service Guide...

  • Page 13: Table Of Contents

    Using the Front Panel for Adjustments Adjustment considerations Valid adjustment input values (U1452A/U1452AT/U1451A) Valid adjustment input values (U1453A) Valid adjustment input values (U1461A) Adjustment procedure Non-Contact Voltage (NCV) Calibration Exiting the adjustment mode Calibration Count Calibration Error Codes U1450 Series/U1461A Service Guide...
  • Page 14 Service and Maintenance Troubleshooting Fuse Replacement Returning the Instrument for Service Replaceable Parts To order replaceable parts Types of Service Available Extended service contracts Obtaining Repair Service (Worldwide) U1450 Series/U1461A Service Guide...
  • Page 15 List of Figures Figure 1-1 Connecting the U1450 Series/U1461A to the M191 32 Ω Figure 1-2 Connecting the U1450 Series/U1461A for 6 EBR measurement 32 U1450 Series/U1461A Service Guide XIII...
  • Page 16 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. U1450 Series/U1461A Service Guide...
  • Page 17 Table 1-3 Performance verification tests for models U1461A/U1453A 27 Table 1-4 Adjustment input values (U1452A/U1452AT/U1451A) 38 Table 1-5 Adjustment input values (U1453A) 40 Table 1-6 Adjustment input values (U1461A) 44 Table 1-7 Calibration error codes 52 Table 2-1 Operating checklist 54 U1450 Series/U1461A Service Guide...
  • Page 18 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. U1450 Series/U1461A Service Guide...

  • Page 19: Calibration Procedures

    U1461A Insulation Multimeter/U1453A Insulation Tester Service Guide Calibration Procedures Calibration Overview 18 Closed-case calibration 18 Keysight calibration services 18 Calibration interval 18 Adjustment is recommended 19 Recommended Test Equipment 20 Calibration Process 21 Test Considerations 22 Performance Verification Tests 23 Performance verification tests for U1452A/U1452AT/U1451A 23 Performance verification tests for U1461A/U1453A 27 Calibration Security 33...

  • Page 20: Calibration Overview

    Calibration Procedures Calibration Overview 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.

  • Page 21: Adjustment Is Recommended

    Tests” but this does not guarantee that the instrument will remain within these limits unless the adjustments are performed. Refer to the “Calibration Count” on page 51 and verify that all the adjustments have been performed. U1450 Series/U1461A Service Guide...

  • Page 22: Recommended Test Equipment

    <20% of the instrument’s 1-year specifications 5520A/5522A Insulation M191 <20% of the instrument’s 1-year specifications resistance Earth-bond • Absolute uncertainty specifications ±(% of reading) Vishay RS Resistor • 5.0 Ω ± 0.5% resistance 5.0 Ω (6 Ω range) U1450 Series/U1461A Service Guide...

  • Page 23: Calibration Process

    6 Secure the instrument against unauthorized calibration; see “Exiting the adjustment mode” on page 50. Ensure that the instrument has quit the adjustment mode and is turned off. 7 Record the new security code and calibration count in the instrument's maintenance records. U1450 Series/U1461A Service Guide...

  • Page 24: Test Considerations

    • Use a shielded twisted pair of PTFE- insulated cables to reduce settling and noise errors. Keep the input cables as short as possible. Long test leads can also act as antennas which may pick up AC signals. • Connect the input cable shields to earth ground. U1450 Series/U1461A Service Guide...

  • Page 25: Performance Verification Tests

    U1451A U1452AT/U1452A ±0.032 V ±0.014V Turn the rotary switch to the position. 60 V 60 V ±0.32 V ±0.14 V 600 V 600 V ±3.2 V ±1.4 V 1000 V 1000 V ±7 V ±4 V U1450 Series/U1461A Service Guide...
  • Page 26 [1] The accuracy of the 600 Ω, 6 kΩ, and 60 kΩ range is specified using a 2-wire compensation configuration and after the Null function is used to subtract the test lead resistance and thermal effect (by shorting the test leads). U1450 Series/U1461A Service Guide...
  • Page 27 60 MΩ ±1.25 MΩ ±1.25 MΩ 100 V, 600 MΩ 600 MΩ ±15.5 MΩ ±15.5 MΩ 100 V, 6 GΩ 6 GΩ ±0.479 GΩ ±0.479 GΩ 100 V, 60 GΩ 30 GΩ ±9.62 GΩ ±9.62 GΩ U1450 Series/U1461A Service Guide...
  • Page 28 600 MΩ 1000 V, 6 GΩ 6 GΩ ±0.125 GΩ ±0.125 GΩ 1000 V, 30 GΩ 30 GΩ ±1.39 GΩ 1000 V, 60 GΩ 60 GΩ ±4.49 GΩ 1000 V, 200 GΩ 100 GΩ ±11.9 GΩ U1450 Series/U1461A Service Guide...

  • Page 29: Performance Verification Tests For U1461A/U1453A

    [1] The Fluke 5520A/5522A is unable to support the testing of the 6 μA range; therefore an alternative test is used, in which the Cal factor for the 6 μA is 235.2 mV and it is used as an output from the Fluke 5520A/5522A. U1450 Series/U1461A Service Guide...
  • Page 30 ±0.363 V While the rotary switch is in the 60 V 60 V, 439 Hz ±3.63 V position, press once. 600 V 600 V, 439 Hz ±36.3 V 1000 V 1000 V, 439 Hz ±63 V U1450 Series/U1461A Service Guide...
  • Page 31 ±1.2 μF ±1.2 μF 1 mF 1 mF ±0.012 mF ±0.012 mF 10 mF 10 mF ±0.12 mF ±0.12 mF Diode 0.85 V ±0.020 V ±0.020 V While the rotary switch is in the position, press twice. U1450 Series/U1461A Service Guide...
  • Page 32 50 V, 600 MΩ 600 MΩ ±0.13 MΩ ±0.13 MΩ 50 V, 6 GΩ 6 GΩ ±0.452 GΩ ±0.452 GΩ 50 V, 60 GΩ 30 GΩ ±9.49 GΩ ±9.49 GΩ U1450 Series/U1461A Service Guide...
  • Page 33 600 MΩ ±7.7 MΩ ±7.7 MΩ 1000 V, 6 GΩ 6 GΩ ±0.092 GΩ ±0.092 GΩ 1000 V, 60 GΩ 60 GΩ ±2.54 GΩ ±2.54 GΩ 1000 V, 200 GΩ 100 GΩ ±6.7 GΩ ±6.7 GΩ U1450 Series/U1461A Service Guide...
  • Page 34 Calibration Procedures Performance Verification Tests 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 35: Calibration Security

    The security code is set to “1234” when the instrument is shipped from the factory. The security code is stored in nonvolatile memory and does not change when power has been turned off. The security code may contain up to four numeric characters. U1450 Series/U1461A Service Guide...

  • Page 36: Unsecuring The Instrument For Calibration

    If the correct security code is entered, PASS is shown briefly, after which the instrument will enter the adjustment mode. If an incorrect security code is entered, an error code will appear briefly, after which the instrument will prompt you for the security code again. U1450 Series/U1461A Service Guide...

  • Page 37: To Change The Calibration Security Code

    To reset the calibration security code to its factory default If you have forgotten the correct calibration security code, you may follow the steps below to reset the calibration security code to the factory default code (1234). U1450 Series/U1461A Service Guide...
  • Page 38 If you want to enter a new security code, see “To change the calibration security code” on page 35. Ensure that you record down the new security code. U1450 Series/U1461A Service Guide...

  • Page 39: Using The Front Panel For Adjustments

    After each adjustment, the display shows PASS. If the calibration fails, the instrument N O T E sounds a beep, and an error number is shown on the display. Calibration error messages are described in “Calibration Error Codes” on page U1450 Series/U1461A Service Guide...

  • Page 40: Valid Adjustment Input Values (U1452A/U1452At/U1451A)

    3.00 V (55 Hz) 60 V 0.9 to 1.1 × Reference Value 30.00 V (55 Hz) 0.9 to 1.1 × Reference Value 30.00 V (55 Hz) 600 V 0.9 to 1.1 × Reference Value 300.0 V (55 Hz) U1450 Series/U1461A Service Guide...
  • Page 41 OPEN Terminals rotary switch to the position. [1] Zero calibration should be executed after the mV and µA/mA calibration are completed. [2] The IR test voltage calibration should be executed after the voltage calibration is completed. U1450 Series/U1461A Service Guide...

  • Page 42: Valid Adjustment Input Values (U1453A)

    0.9 to 1.1 × Reference Value 6.0000 V 3.0000 V 0.9 to 1.1 × Reference Value 60.000 V 30.000 V 0.9 to 1.1 × Reference Value 600.00 V 300.00 V 0.9 to 1.1 × Reference Value 1000.0V 1000.0 V SHORT SHORT U1450 Series/U1461A Service Guide...
  • Page 43 Ω μA mA/COM 6 μA 3.0000 μA position. Terminals Ω μA mA/COM 60 μA 30.000 μA Terminals Ω μA mA/COM 600 μA 300 μA Terminals Ω μA mA/COM 6 mA 3 mA Terminals U1450 Series/U1461A Service Guide...
  • Page 44 0.9 to 1.1 × Reference Value SHORT SHORT 0.000 Ω 9. Diode SHORT V/COM Terminals While the rotary switch is in the 0.9 to 1.1 × Reference Value 1.0000 V 1.0000 V position, press twice. SHORT SHORT U1450 Series/U1461A Service Guide...
  • Page 45 [1] Zero calibration should be executed after the mV and µA/mA calibration at the Ω position are completed. [2] The IR test voltage calibration should be executed after the DCV calibrations are completed. U1450 Series/U1461A Service Guide...

  • Page 46: Valid Adjustment Input Values (U1461A)

    0.9 to 1.1 × Reference Value 6.0000 V 3.0000 V 0.9 to 1.1 × Reference Value 60.000 V 30.000 V 0.9 to 1.1 × Reference Value 600.00 V 300.00 V 0.9 to 1.1 × Reference Value 1000.0V 1000.0 V SHORT SHORT U1450 Series/U1461A Service Guide...
  • Page 47 Turn the rotary switch to Ω μA mA/COM 6 μA 3.0000 μA position. Terminals Ω μA mA/COM 60 μA 30.000 μA Terminals Ω μA mA/COM 600 μA 300.00 μA Terminals Ω μA mA/COM 60 mA 30.000 mA Terminals U1450 Series/U1461A Service Guide...
  • Page 48 30.000 Ω 0.9 to 1.1 × Reference Value SHORT SHORT 0 Ω 9. Diode While the rotary switch is in the 0.9 to 1.1 × Reference Value 1.0000 V 1.0000 V position, press twice. SHORT SHORT U1450 Series/U1461A Service Guide...
  • Page 49 30 V (55 Hz) Low Sense 13. IR 50 V Turn OPEN OPEN OPEN Terminals the rotary switch to the position. [1] Zero calibration should be executed after the mV and µA/mA calibration at the Ω position are completed. U1450 Series/U1461A Service Guide...

  • Page 50: Adjustment Procedure

    N O T E Table 1-6. 7 Use the arrow keys to enter the actual applied input values. 8 Press to start the adjustment. CAL is shown on the display to indicate that the calibration is in progress. U1450 Series/U1461A Service Guide...

  • Page 51: Non-Contact Voltage (Ncv) Calibration

    3 Ensure that the EARTH button of calibrator is turned ON. 4 Put the tester and ensure the tester’s top is vertically and horizontally centered to contact the banana plug’s Hi terminal. 5 Set the source output to 10 V/55 Hz. U1450 Series/U1461A Service Guide...

  • Page 52: Exiting The Adjustment Mode

    1 Remove all the shorting plugs and connectors from the instrument. 2 Record the new Calibration Count. 3 Press simultaneously to exit the Adjustment Mode. 4 Cycle the instrument’s power. The instrument will then be secured. U1450 Series/U1461A Service Guide...

  • Page 53: 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. 3 Press again to exit the calibration count mode. U1450 Series/U1461A Service Guide...

  • Page 54: Calibration Error Codes

    Calibration error: serial number code invalid 004/ER004 Calibration error: calibration aborted 005/ER005 Calibration error: value out of range 006/ER006 Calibration error: signal measurement out of range 007/ER007 Calibration error: frequency out of range 008/ER008 EEPROM write failure U1450 Series/U1461A Service Guide...

  • Page 55: Service And Maintenance

    U1461A Insulation Multimeter/U1453A Insulation Tester Service Guide Service and Maintenance Troubleshooting 54 Fuse Replacement 55 Returning the Instrument for Service 57 Replaceable Parts 58 To order replaceable parts 58 Types of Service Available 59 Extended service contracts 59 Obtaining Repair Service (Worldwide) 60 This chapter will help you troubleshoot a failing instrument.

  • Page 56: Troubleshooting

    Verify the baud rate, data bit, and parity settings in the Failed on remote control tester’s setup mode. (Default values are 9600, 8, and none.) ❏ Verify that the driver for the IR-USB interface is installed on the PC. U1450 Series/U1461A Service Guide...

  • Page 57: Fuse Replacement

    2 Loosen and remove the two screws with a suitable Phillips screwdriver as shown on the right. 3 Lift and remove the fuse cover as shown on the left. U1450 Series/U1461A Service Guide...
  • Page 58 6 Ensure that the inner rubber cover is positioned properly. 7 Replace the fuse cover back in its original position and tighten the screws. 8 Finally fit the orange rubber holster back on the tester. U1450 Series/U1461A Service Guide...

  • Page 59: Returning The Instrument For Service

    4 inches of compressible packaging material around all sides for the instrument. Use static- free packaging materials to avoid additional damage to your unit. Keysight suggests that you always insure your shipments. N O T E U1450 Series/U1461A Service Guide...

  • Page 60: Replaceable Parts

    To order replaceable parts from Keysight, do the following: 1 Contact your nearest Keysight Sales Office or Service Center. 2 Identify the parts by the Keysight part number shown in the support parts list. 3 Provide the instrument model number and serial number. U1450 Series/U1461A Service Guide...

  • Page 61: Types Of Service Available

    Many Keysight products are available with optional service contracts that extend the covered period after the standard warranty expires. If you have such a service contract and your instrument fails during the covered period, Keysight will repair or replace it in accordance with the contract. U1450 Series/U1461A Service Guide...

  • Page 62: Obtaining Repair Service (Worldwide)

    Or contact your Keysight representative. Before shipping your instrument, request the Keysight Service Center to provide shipping instructions, including what components to ship. Keysight recommends that you retain the original shipping carton for use in such shipments. U1450 Series/U1461A Service Guide...
  • Page 63 www.keysight.com Contact us To obtain service, warranty, or technical assistance, contact us at the following phone or fax numbers: United States: (tel) 800 829 4444 (fax) 800 829 4433 Canada: (tel) 877 894 4414 (fax) 800 746 4866 China: (tel) 800 810 0189 (fax) 800 820 2816 Europe: (tel) 31 20 547 2111...
  • Page 64 This information is subject to change without notice. © Keysight Technologies 2015 Edition 3, April 2015 *U1451-90014* U1451-90014 www.keysight.com...

This manual is also suitable for:

U1453aU1461aU1452atU1451aU1452a

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