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Practically all analog meters are a coil movement of 50micro amps or so to measure a 50amps then becomes a problem the meter will destroy itself. However is a very small shunt of resistance if placed in the path of the 50 ampere flow then a small voltage drop will develop a Mv. THAT A METER CAN SAFELY READ. this voltage drop can be calibrated to show a 50 ampere full meter deflection. Therefore read Mv to get amps. It should be noted that since the small resistance is in series with the circuit there will be an error caused by the shunt resistance. Bottom line it should be small in value as possible to reduce this error for accuracy sake. Digital meter will function the same way as an analog meter meaning shunt mv reading for full scale readout.
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∙ 14y ago
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∙ 11y agoOhmeter
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