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Using induction clamp to see ignition voltage spikes and DC current?

Discussion in 'Electronic Basics' started by Ricky Spartacus, Jan 3, 2004.

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  1. I`m trying to display ignition voltages and DC currents on my o`scope.
    I`ll be clamping the timing gun`s induction clamp onto one of the
    ignition plug wires and hook the other end of the induction wires to
    an o`scope. I am hoping to see a voltage jump of some sort. Will this
    work? And If I later clamp it around an alternator cable, being under
    load, will I see at least 30A of DC currents?
    TIA
    Ricky
     
  2. Neil Nelson

    Neil Nelson Guest

    I doubt it, but experiment anyway.
    Generally, if you want to see anything useful with any level of
    resolution, you need a capacitive pick-up to view an ignition
    waveform. Your #1 inductive clamp should work as a trigger
    though.
    Nope, you'll need a hall effect inductive clamp to measure
    current.
     
  3. Jim

    Jim Guest

    You can see the plugs firing with just a couple loops around the plug
    wires. You won't see much on the alternator as it's damped by the battery.
     
  4. Mike Walsh

    Mike Walsh Guest

    An inductive clamp will sense changes in the magnetic field produced by an electric current and can't be used for DC.
     
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