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Draw and explain true RMS voltmeter with thermocouple. Why there is error in reading a voltmeter calibrated to RMS values when it is used into read signals other then sine wave.
written 4.5 years ago by gravatar for teamques10 teamques10 ★ 70k modified 3.7 years ago by gravatar for DevarenjiniP DevarenjiniP • 3.2k
electronic instrumentation and measurement
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written 4.5 years ago by gravatar for teamques10 teamques10 ★ 70k

Complex waveform are most accurately measured with an rms voltmeter. This instrument produces a meter indication by sensing waveform heating power. which is proportional to the square of the rms value of the voltage. This heating power can be measured by amplifying and feeding it to a thermocouple. whose output …

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