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How Multimeter Works
The basic principle of multimeter is to make use of a sensitive magneto-electric DC ammeter (micro-safety meter) to do the table head. When a small current passes through the head of the meter, a current is indicated. But the head cannot pass the big current, therefore, must in the table head parallel and in tandem some resistance carries on the shunt or the step-down, thus measured the electric current, the voltage and the resistance in the circuit.
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