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	Sanwa Electric Instrument Co., Ltd.	Sanwa Electric Instrument Co., Ltd.

Tell me about the true RMS method (TRUE RMS).

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Question
Tell me about the true RMS method (TRUE RMS).
Answer
AC voltage/current measurement methods include true RMS type and average value response type. When the measurement target is a sine wave, the measured value by the average value response type is the same as the true RMS value type. In the case of a distorted waveform, the measured value by the average value response type has a large error, but the measured value by the true RMS type is the correct RMS value.