The measured value display does not indicate “Lo” when the voltage sensor is not attached to a wire.

QThe measured value display does not indicate “Lo” when the voltage sensor is not attached to a wire.

A

This behavior is not indicative of a malfunction. Since the voltage sensor has a high input impedance, it picks up noise when not attached to a wire. This can cause the instrument to display a value of about 30 V. (If the value is less than 30 V, the display will indicate “Lo.”)