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1.前言检定精密功率表和电能表,需要准确测量交流电压。这个电压可以通过有效值一直流比较仪与直流参考基准相比较而准确测得。检定频率为1kHz 以下的精密功率、电能表,可以作用本文介绍的精密有效值一直流电压比较
1. Preface Verifying the precision power meter and watt-hour meter requires accurate measurement of the AC voltage. This voltage can be measured by comparing the rms DC comparator with the dc reference. Check the frequency of 1kHz below the precision power, watt-hour meter can be used in this article describes the rms voltage DC voltage comparison