Non-Contact Ac Voltage Detector; Operating Instructions - Extech Instruments EX330 User Manual

Operating Instructions

WARNING: Risk of electrocution. High-voltage circuits, both AC and DC,
are very dangerous and should be measured with great care.
1. ALWAYS turn the function switch to the OFF position when the meter is not in
use.
2. Press the HOLD button to freeze a displayed reading
NOTE: On some low AC and DC voltage ranges, with the test leads not
connected to a device, the display may show a random, changing
reading. This is normal and is caused by the high-input sensitivity. The
reading will stabilize and give a proper measurement when connected
to a circuit.

NON-CONTACT AC VOLTAGE DETECTOR

The EX310 can detect the presence of AC voltage (from 100 to 600VAC) simply
by being held very near to a voltage source.
WARNING: Test the AC voltage detector on a known live circuit before
each use.
WARNING: Before using the meter in the AC Voltage Detector mode,
verify that the battery is fresh by confirming characters appear on the LCD
when the function dial is turned to any position. Do not attempt to use the
meter as an AC Voltage Detector if the battery is weak or bad.
The NCV function works on any rotary switch position.
1. Test the detector on a known live circuit before use.
2. Press and hold the NCV button for the duration of
the test. The meter will beep once when the button
is pushed.
3. Hold the top of the meter very close to the voltage
source as shown.
4. If voltage is present, the rim of the LCD display will
flash a bright orange and an audible warning will
sound.
EX330-EU-ENG – V4.2 1/08
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