METREL GigaOhm 5kV User Manual
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METREL GigaOhm 5kV User Manual

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GigaOhm 5kV
MI 3202
User Manual
Version 1.4, Code No. 20 751 271

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Summary of Contents for METREL GigaOhm 5kV

  • Page 1 GigaOhm 5kV MI 3202 User Manual Version 1.4, Code No. 20 751 271...
  • Page 2 Mark on your equipment certifies that this equipment meets the requirements of the EU (European Union) concerning safety and electromagnetic compatibility regulations © 2007, 2010 Metrel No part of this publication may be reproduced or utilized in any form or by any means without permission in writing from METREL.

  • Page 3: Table Of Contents

    MI 3202 GigaOhm 5 kV Table of contents Table of contents General introduction ..................4 Features ......................4 Applied Standards ..................4 Instrument Description ..................5 Instrument Casing ..................5 LC Display .....................5 Operator’s Panel ...................6 Connectors ....................7 Accessories ....................Test leads...................... Warnings ......................Performing measurements ................

  • Page 4: General Introduction

    1 General introduction 1.1 Features The GigaOhm 5kV Tester is a portable battery / mains powered test instrument intended for simple testing of Insulation Resistance by using high test voltages of up to 5 kV. It operates on a SIMPLE and CLEAR basis.

  • Page 5: Instrument Description

    MI 3202 GigaOhm 5 kV Instrument Description 2 Instrument Description 2.1 Instrument Casing The instrument is housed in a plastic box that maintains the protection class defined in the general specifications. 2.2 LC Display The segment LCD has a backlight and offers easy-to-read results and all shows all associated parameters.

  • Page 6: Operator's Panel

    MI 3202 GigaOhm 5 kV Instrument Description 2.3 Operator’s Panel The operator’s panel is shown in Fig. 2 below. Fig. 2. Front panel Legend: 1.. key to switch to Insulation measurement mode and to set limit value. 2..V key to switch to Voltage measurement mode. 3..

  • Page 7: Connectors

    MI 3202 GigaOhm 5 kV Instrument Description 2.4 Connectors The GigaOhm 5 kV Tester contains the following connections: Connection of test leads to four banana safety sockets (Fig. 3), Mains supply cable connection to the mains socket (Fig. 4). Fig. 3. Test leads connector 1..

  • Page 8: Accessories

    The accessories consist of standard and optional accessories. Optional accessories can be delivered upon request. See attached list for standard configuration and options or contact your distributor or see the METREL home page: http://www.metrel.si. 2.6 Test leads The standard length of test leads is 2m, optional lengths are 8m and 15m. For more details see attached list for standard configuration and options or contact your distributor or see the METREL home page: http://www.metrel.si.
  • Page 9 MI 3202 GigaOhm 5 kV Instrument Description 2.5.1. High voltage shielded test tips with High voltage alligators clips. Application notes: These test leads are designed for diagnostic testing of insulation and also for hand held testing of insulation. Insulation ratings: High voltage banana connector (red, black): 10kV d.c (basic insulation).

  • Page 10: Warnings

    In order to reach the highest level of operator’s safety while carrying out various measurements and tests using the GigaOhm 5kV Tester, as well as to ensure that the test equipment remains undamaged, it is necessary to consider the following warnings: MEANING OF SYMBOLS Symbol on the instrument means “Read the User Manual with special...
  • Page 11 MI 3202 GigaOhm 5 kV Warnings WORKING WITH THE INSTRUMENT  Use only standard or optional test accessories supplied by your distributor!  Equipment under test must be switched off (i.e. de-energized) before test leads are connected to the equipment. ...

  • Page 12: Performing Measurements

    MI 3202 GigaOhm 5 kV Performing measurements 4 Performing measurements 4.1 Switching on the instrument Auto-calibration The instrument is switched ON by pressing the ON/OFF key. After turning on (Fig. 7), the instrument first executes the auto-calibration (Fig. 8). Note: If batteries are defective or missing and the instrument is powered from mains supply, the instrument could not be turn ON Measuring test leads have to be disconnected during auto-calibration.
  • Page 13 MI 3202 GigaOhm 5 kV Performing measurements Note: If batteries are defective or missing, the charger will not work. If you connect the instrument to the mains supply when instrument is turn ON, the instrument will automatically switch from the battery supply to the main supply. If the instrument is not in insulation measuring mode*, internal charger will begin to charge the batteries.

  • Page 14: Measurements

    MI 3202 GigaOhm 5 kV Measurements 5 Measurements 5.1 Generally about DC High voltage testing The purpose of insulation tests Insulating materials are important parts of almost every electrical product. The material’s properties depend not only on its compound characteristics but also on temperature, pollution, moisture, ageing, electrical and mechanical stress, etc.

  • Page 15: Guard Terminal

    MI 3202 GigaOhm 5 kV Measurements 5.2 Guard terminal The purpose of the GUARD terminal is to lead away potential leakage currents (e.g. surface currents), which are not a result of the measured insulation material itself but are a result of surface contamination and moisture. This current interferes with the measurement i.e.

  • Page 16: Insulation Resistance Measurement

    MI 3202 GigaOhm 5 kV Measurements 5.3 Insulation Resistance measurement Select this function by pressing the  key displays the following states (initial state and state with results after the completion of the measurement). See Fig. 12 below. Display with results Initial display Fig.

  • Page 17: Voltage Measurement

    MI 3202 GigaOhm 5 kV Measurements Set-up test voltage for Insulation Resistance (Fig.13): Adjust test voltage using the  and  keys. Fig. 13. Set-up test voltage in Insulation Resistance measurement Legend of displayed symbols: INSULATION RESISTANCE Name of selected function Unominal 250V Set test voltage...
  • Page 18 MI 3202 GigaOhm 5 kV Measurements Fig. 14. Voltage function display Measurement procedure: Connect the test leads to the instrument and to the measured source. Press the V key to select voltage mode, continuous measurement will automatically start to run. Warning! ...

  • Page 19: Maintenance

    MI 3202 GigaOhm 5 kV Maintenance 6 Maintenance 6.1 Inspection To maintain the operator’s safety and to ensure the reliability of the instrument it is advisable to inspect the instrument on a regular basis. Check that the instrument and its accessories are not damaged.
  • Page 20 MI 3202 GigaOhm 5 kV Maintenance  Turn the power off and disconnect any measurement accessories or mains supply cable connected to the instrument before opening the battery cover to avoid electric shock.  Remove the battery cover.  All six cells have to be replaced and they have to be of the same type. ...

  • Page 21: Cleaning

    MI 3202 GigaOhm 5 kV Maintenance Cleaning Use a soft cloth, slightly moistened with soapy water or spirit to clean the surface of the instrument and leave the instrument to dry totally before using it. Notes!  Do not use liquids based on petrol or hydrocarbons! ...

  • Page 22: Specifications

    MI 3202 GigaOhm 5 kV Specifications 7 Specifications 7.1 Measurements Note: All data regarding accuracy are given for nominal (reference) environment condition. Insulation resistance Nominal test voltage: 250 V, 500 V, 1 kV, 2.5 kV, 5 kV Current capability of test generator: >1 mA Short-circuit test current: 5 mA.
  • Page 23 MI 3202 GigaOhm 5 kV Specifications Generator Capability vs Resistance [ M ] Utest=5kV Voltage Voltage AC or DC Display range External Voltage (V) Resolution Accuracy 0  600 (3 % of reading + 4 V) Frequency of external voltage Display range (Hz) Resolution Accuracy...

  • Page 24: General Specifications

    MI 3202 GigaOhm 5 kV Specifications 7.2 General specifications Battery power supply ........7.2 V DC (6 × 1.2 V NiMHC size) Mains power supply ........90-260 V AC, 45-65 Hz, 40 VA Over-voltage category ........300 V CAT III Protection classification .........

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