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  • Capacitance DMM

    hey there

    Capacitors can be flakey little devices and whilst cheap, the cost of replacing rather than testing adds up over time.

    Has anyone got or used or tried a DMM capacitance tester such as

    http://www.jaycar.com.au/productView...=&SUBCATID=444

    looks like a neat little device - goes up to the big 20 000uf caps used on pinball boards too

    interesting to hear comments?

    Ric
    Ric
    looking for:
    the baseboard for a Gottlieb Royal Guard
    Zaccaria Devil Riders Backglass
    Williams OXO, GTB Volcano

  • #2
    Quite a volume discount on 6 !!!
    I mean, if we want enough, one person goes and gets and even with postage @ 3.20 a piece. We are still in front.

    Having said that, the major cost of replacing caps is the time it takes for potentially no gain. This would be a huge time saver, in that regard. hmmm....
    ...maybe, but then again "maybe" covers a lot of things, like: maybe Michael Jackson really is LaToya in drag, or maybe if Dorothy clicks her heels 3 times and says "There's no place like home" while she is at home, she would telefrag herself..." - MadMikeAU

    | My | |

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    • #3
      i think it looks like a nifty tool

      and the costs of caps does add up

      I just had to replace at least 15 on a board - yes they were smashed but to tes others would be a great help
      Ric
      looking for:
      the baseboard for a Gottlieb Royal Guard
      Zaccaria Devil Riders Backglass
      Williams OXO, GTB Volcano

      Comment


      • #4
        I would think you would have to lift at least one leg to take it out of the circuit to test accurately.

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        • #5
          Better to use an ESR meter for in circuit caps

          Regards,

          JWG.

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          • #6
            Well with the age of most of these devices and the fact that at least one leg needs to be lifted from the PCB, (Which is quite hard with some caps) Would it not be a good idea to just replace them anyway?

            Not having a go at anyone.. just my 2c.

            I know i re-cap all my chassis once they work. I wouldn`t have thought the cost would have been too much over $20. But i do buy in bulk and wholesale... So that would help keep costs down. Most expencive caps are the high voltage ones. Like 200V 680 uF.. I`m sure i saw a place selling them for $7 each.. Also i don`t think Jaycar or tricky Dicky sell them...

            The bigest pain with caps is the need to have a "collection" of them if you want to have most on hand ready for action...

            I haven`t used the meter from Jaycar.. But have used a more expencive meter. But only to check SMD caps cos most don`t have there size on them (Well for 0402 Packages anyway .

            Mrv.

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            • #7
              sorry for the newbie questions however what would be difference between the ESR meter and the Capacitance DMM

              I assume the ESR is giving you an OHMs reading for the series reisstance across the cap and the cap DMM is actually testing the vlaue of the cap

              although the ESR can test caps in circuit (from what i have read), doesn't a reading of the caps value give more valuable data?

              Ric
              Ric
              looking for:
              the baseboard for a Gottlieb Royal Guard
              Zaccaria Devil Riders Backglass
              Williams OXO, GTB Volcano

              Comment

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