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5.8. NCV test
1. Turn the rotary switch to "NCV".
2. Place the top of the meter close to the object to be measu-
red. If the meter detects AC voltage, the LCD will display
the corresponding horizontal lines (high, medium, low)
according to the detected signal strength, and the buzzer
will sound different frequencies.
NOTE:
1. Even if there is no indication, voltage may still exist. Do not
rely on NCV detectors to determine whether there is voltage
on the wire. The detection operation may be affected by
factors such as socket design, insulation thickness and
type.
2. When the instrument input terminal input voltage, due to the
existence of induced voltage, NCV test may also detect AC
voltage.
3. Interference sources in the external environment (such as
flashlights, motors, etc.) may falsely trigger NCV detection.
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