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Test ceramic capacitors with an insulation tester

By on January 10, 2014

How do you test ceramic capacitors with an insulation tester?

Answer:

If your non polar capacitor is rated as 1000volt then select the range 1000v, connect the test probes to the cap leads  (either  way) and press the start button. A good one should not show any resistance and a bad one will show resistance value. I suggest that you test on good cap first to be familiar with the reading.

Note: please do not select 1000v and test on a 500 volt cap as it can blow the cap.

Jestine

 

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8 Comments

  1. Robert

    January 10, 2014 at 3:47 pm

    Hello Mr. Yong,
    I bought a Smart Sensor AR907+, a digital Insulation Tester. It tests at 50, 100, 250, 500, 1000 volts. Good caps seem to always show OL and only some bad caps show a reading so far. I'll have to do some more testing with it before I know if I can trust it or not.

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    • Jestine Yong

      January 10, 2014 at 11:09 pm

      HI Robert,

      Yes you need to do more testing on good cap. A bad non polar cap will surely have resistance reading.

      Jestine

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      • Robert

        January 21, 2014 at 10:00 pm

        Hello Mr. Yong.
        This is a very important topic and it amazes me that nobody else has commented on it! I wonder how many repairs that people could not perform are related to the fact that they do not have or use an insolation tester?
        Just because a component doesn't breakdown with an Analog MM (12v), doesn't mean it won't breakdown at 50 volts.
        Are you as surprised as I am?

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        • Jestine Yong

          January 22, 2014 at 10:44 am

          Hi Robert,

          You are right.

          Jestine

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  2. Chris

    March 8, 2020 at 6:43 pm

    Will any insulation tester do,ac up to 1000v digital meter some cheap ones out there no point in getting a $100-200 unit if a Rm100 unit can work

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    • Jestine Yong

      March 9, 2020 at 11:01 am

      Hi Chris,

      Sorry I don't get your point. Do you mean if a multimeter that can check up to 1000V be able to act as an insulation tester?

      Jestine

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  3. Chrid

    March 9, 2020 at 7:50 pm

    Sorry,My point is can any cheap insulation tester that can test up to 1000v work to test the capacitor ie VCB60+ as advertised in Lazada or similar units in the RM 100 to 150 range

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    • Jestine Yong

      March 11, 2020 at 9:53 pm

      Hi Chris,

      If the cheap meter stated that it can test up to 1000V then it can be surely use to test cap up to 1000 volt.

      Jestine

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