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Discussion in 'Electronic Design' started by [email protected], Jun 1, 2007.

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  1. Guest

    Could anybody tell me why does charger burn out when I connect just
    one probe clamp of oscilloscope to high voltage side of circuit?
  2. D from BC

    D from BC Guest

    Scope is without isolated ground.
    D from BC
  3. Lionel

    Lionel Guest

    I'm not a 100% sure what you're trying to say, but it sounds like
    you're probing a live, mains-powered device, & attaching your probe
    ground to something with lots of volts on it.
    DON'T DO THAT! - At least isolate the device under test!
  4. Yes use an isolating transformer, do no be tempted to disconnect the
    ground wire from the scope. That is a trick that people used to do, but
    it is highly dangerous.

  5. Guest

    What type/ model of scope are you using?
    If you don't ground the scope + a fault occurs, the current could go
    to ground via you.
    If you are having problems with spikes, and if capturing the waveform
    is not essential you could connect a choke, or similar, between the
    probe + oscilloscope.

    Just a few thoughts, JD
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