Why does my Multimeter not go to zero in AC volts mode?

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For a true-rms ac multimeter, such as the UNI-T UT71E or UT233 clamp meter, it will not zero and should not be zeroed.

Most of these true-rms type multimeters have a minimum ac voltage and current level specification for both the ac volts and ac current modes, typically specified from 3% to 5% of range.

When a signal is applied above the specified minimum level, the meter will meet its accuracy specifications.

 

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