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Multimeter Problem.

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Please help. I have a second hand P.O. meter no 12 C/1. It is a moving coil meter. It reads o.k. on Volts but under reads on Ohms. The zeroing pot does not seem to work. A label inside states that it has thick film components. Why won't it read Ohms accurately? Can it be repaired.

Thanks,

Z.

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  • 0

    Man and boy I`ve always loved those sort of meters. Ok they loaded the circuit a bit (no bad thing in some instances), easily damaged, parallax error to watch for .. And watching the needle waggle helped resolve what was going on in the input, such as mains ripple and cap charge/discharge .  But oh so beautiful . A “proper” meter   ?

     

    About £200 at todays prices without the case

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  • 0

    Man and boy I`ve always loved those sort of meters. Ok they loaded the circuit a bit (no bad thing in some instances), easily damaged, parallax error to watch for .. And watching the needle waggle helped resolve what was going on in the input, such as mains ripple and cap charge/discharge .  But oh so beautiful . A “proper” meter   ?

     

    About £200 at todays prices without the case

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