Non-Contact Voltage Detector - Extech Instruments MA160 User Manual

Non‐Contact Voltage Detector
WARNING: It is possible for voltage to be present in a circuit even if the meter does not
beep or flash the NCV LED lamp. Always verify meter operation on a known live AC current
circuit and verify that the batteries are fresh before use.
When the meter senses an AC Voltage or electromagnetic field > 100VAC, the following occurs:
 The audible beeper sounds ON and OFF
 The LED lamp flashes ON and OFF
 The display shows 1, 2, 3, or 4 dashes
The greater the electrical field strength, the faster the rate of the audible beeper, the flashing of
the LED lamp, and the number of dashes displayed. If the meter does not emit a tone or flash
the LED in this mode, there is still the possibility that voltage is present; please use caution.
1. Turn the function switch to the NCV position to select Non‐Contact Voltage Detect mode.
2. Note that EF is displayed when in this mode. If the EF does not display when the function
switch is turned to the NCV position, check the batteries and do not use the meter until EF
is displayed.
3. To test, place the meter near a source of electrical energy. Note that the tip of the meter
offers the highest sensitivity.
4. Note the audible beeping, the flashing LED, and the displayed dashes when a source of
electrical energy is detected.
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Fig 4‐4 NON‐CONTACT VOLTAGE DETECTOR
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