Multi Meter

Discussion in 'Technical Help' started by Eric27, Nov 27, 2021.

  1. Eric27

    Eric27 Member

    Jan 14, 2019
    38
    18
    Canada
    #1 Eric27, Nov 27, 2021
    I am testing my 1977 T140 charging system with a multimeter. When I get the meter close to the running bike the meter is erratic at best. I am using Champion N4 plugs which is causing the erratic meter readings.
    As these plugs are not R rated I need a recommendation for a multimeter that will do the job. I believe it has to have EMI suppression.
    Thanks.
     
    • Agree Agree x 1
  2. capt

    capt Elite Member

    May 8, 2016
    3,052
    750
    western Australia
    #2 capt, Nov 27, 2021
    The coils are the likely culprit ! Build a Faraday cage , put aluminium foil about an inch or more over and above the coils. A large old metal kitchen strainer ??
    Then try your Meyer readings again.
     
  3. Eric27

    Eric27 Member

    Jan 14, 2019
    38
    18
    Canada
    #3 Eric27, Nov 28, 2021
    Hmmm….food for thought. Thanks for the reply. My meter worked fine when I had R plugs in it.
     
  4. Cyborgbot

    Cyborgbot Guest

    #4 Cyborgbot, Nov 28, 2021
    Get some suppressor caps for the plugs? They reduce EMI.
     
  5. speedrattle

    speedrattle Senior Member

    Feb 19, 2021
    1,171
    243
    appalachia usa
    #5 speedrattle, Dec 2, 2021
    youre using a modern digital multi-meter?

    can you buy a cheap analog instrument from an elctronics store? radioshack used to sell a little VOM for less than ten bucks. no electromagnetic issues at all.

    modern is not necessarily appropriate.
     
  6. Eric27

    Eric27 Member

    Jan 14, 2019
    38
    18
    Canada
    #6 Eric27, Dec 2, 2021
    Thanks for the input.
    I ended up getting a new Klein Clamp on multi meter. All
    Good now. I needed to upgrade any way.
    Thanks all for your help
     
  7. nickjaxe

    nickjaxe Active Member

    Sep 2, 2020
    71
    28
    Cheshire UK
    #7 nickjaxe, Dec 7, 2021
    Its the cheap Multi Tester.....you could try another brand maybe ok....I take it that its fine engine not running....
     
  8. Eric27

    Eric27 Member

    Jan 14, 2019
    38
    18
    Canada
    #8 Eric27, Dec 7, 2021
    Yup cheap for sure
    I bought a Klein clamp on
    Problem solved
    Cheers
     
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