Sofamel 635310, Руководство пользователя

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Operation Guide
2) Press NCV key, put the NCV sensor close to the measured
cable, the meter could detect if the measured cable is >90V
AC voltage or not. When the meter detects AC voltage, the
meter buzzer alarms and the backlight flashes.
Note:
1 ） Even there is no alarm indication, the voltage might still exist.
Do not judge if there exist voltage or not in the cable relying on
non-contact voltage detector. The detection operation might
be affected by various factors such as the socket design and
insulation thickness types are different and so on.
2 ） In NCV detection mode, the meter will not measure the
voltage, resistance and current at the same time.