can't solve this voltage measurement problem

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  1. - 11th October 2009, 18:20 #4
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    Christopher4187
    Christopher4187 is offline Senior Member
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    Jerson,

    I've attached a quick drawing of the circuit. The problem is, I don't have the piece of equipment with me but if I remember correctly, the frequency is 500Hz but it is very erratic. Not only that, not all pieces of equipment have this problem because some are new chargers and some are old. It's not AC mains, it's the output of the battery charger.
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