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The LCR digital E7-8 meter has been produced presumably since 1977. LCR meter provides a measurement of the parameters of capacitors, inductors. resistors, various elements of radio circuits with a digital readout of measured values "‹"‹and information output in code 8-4-2-1. The device can be used to determine the division ratio of transformers, check the quality of shielding, measure the capacitance of diodes and transient resistance of switches. LRC functions can be extended (temperature, pressure, humidity, etc.) by using sensors that convert the measured physical quantity into capacitance, inductance, resistance, or dielectric loss tangent. The measurement principle is based on a bridge method with phase-sensitive balancing detectors. The reading of the measured value is four-digit.