LCR meter is used to measure the inductance (L), capacitance (C) and resistance (R) of an electronic component and measure a physical property known as impedance. Using an LCR meter is usually simple—but there are some setting choices you need to be aware of that will affect your measurements. In some cases, choosing the wrong settings can result in poor measurement accuracy. They used in laboratories for circuit testing and components calibration.
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Measure the impedance of a circuit and help you troubleshoot or characterize existing circuits. • Identify unmarked components and sort components into bins with specified tolerances. • Battery-operated, handheld LCR meters are convenient to carry into the field for testing away from the bench. • Measure AC characteristics of a component as a function of frequency and amplitude to help you predict the AC behavior in a circuit. • Characterize motors1 by inductance measurements and inductance as a function of rotor angle. • Identify the coil leads of an unmarked relay by measuring the inductance. • Select components for passive filters, then measure the filter's impedance at various frequencies. • Measure components in-circuit. In particular, find capacitors with high ESR. • Estimate the winding ratio of a transformer via inductance measurements. • Measure the Q of coils. Sometimes a lossy inductor is desired and the LCR meter can tell you if you've made it correctly. • If you maintain equipment, measure the equipments' characteristics with the LCR meter and write the values down for future reference.
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