CURRENT COMPARATOR FOR POWER AND ENERGY MEASUREMENTS

摘要

An instrument for the measurement of energy or power with a high degree of precision. The voltage and current components of the power are determined individually. The voltage component is measured using a precise instrument such as an AC/DC comparator. The current component is measured in a current comparator in which it is balanced against current obtained by applying the voltage component to a high quality resistor and a high quality capacitor. The instrument is especially useful in the calibration of wattmeters and watt-hour meters.