MA150 Datasheet, PDF (4/7 Pages) Extech Instruments Corporation. – 200A AC Mini Clamp-on Meter

Non-Contact AC Voltage Detection
WARNING: Risk of Electrocution. Before use, always test the Voltage Detector on a
known live circuit to verify proper operation
1) AC Voltage detection operates on any of the three Function switch positions.
2) Touch the probe tip to the hot conductor or insert into the hot side of the electrical
outlet.
3) If AC voltage is present, the detector light will illuminate.
NOTE: The conductors in electrical cord sets are often twisted. For best results, slowly
slide the probe tip along a length of the cord to assure placing the tip in close
proximity to the live conductor.
NOTE: The detector is designed with high sensitivity. Static electricity or other sources of
energy may randomly turn the detector light on. This is normal operation
MAX Hold
To hold the highest reading on the LCD, momentarily press the “MAX ” key. The meter
reading will not change as readings change, rather it will only display the highest reading
encountered since the MAX hold button was pressed. Press the MAX hold button again to
return the meter to normal operation.
Backlight
Press and hold the “MAX ” key for more than one second to turn the backlight on. This will
also activate the MAX Hold function. To release the MAX Hold function and return the meter
to normal operation, press the “MAX ” key momentarily. The backlight will automatically turn
off after 15 seconds. To manually turn off the backlight, press and hold the “MAX ” key for
more than 1 second.
Flashlight
Press and hold the top button to turn the flashlight on. Release the button to turn the
flashlight off.
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MA150 Ver. 2.0 08/07