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Why no voltage is displayed when measuring voltage at a frequency of 1Khz through UT81 series.

Answer 1: DC and wave form are displayed on the screen, DC indicates the multimeter is in DC mode, and wave form indicates AC voltage measurement. Please press AUTO button to switch to AC mode.

Answer 2: Turn the rotary switch to corresponding measurement gear (AC or DC gear). If the measured signal is not known, please press AUTO button so as to detect the optimum test signal.

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