Resistance measurement

A micro ohmmeter is used to measure the resistance of a component that is separated from the rest of the circuit by means of resistance measurement. The measuring device sends a current of a certain magnitude through the measured object and determines the resistance value via the voltage required for this (Ohm’s law).

A micro ohmmeter must therefore always have a voltage source and normally a circuit to stabilize the measuring current. Voltage is measured, but the measured value is displayed in ohms. Resistance can also be determined by measuring voltage and current separately.

Since with alternating current the core losses of the iron are always measured as well, one gets somewhat different values compared to the direct current resistance measurement.

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