Merely detecting the presence of 120VAC near a bundle
of wires does not tell you which wire of the bundle is
the “hot” wire; any of the wires could be activating the
alarms. The VR40 can help you isolate the hot wire. This
application calls for turning down the sensitivity in
stages after the NCV detector senses voltage. As you
reduce sensitivity, at some stage only the energized
wire will produce a field strong enough to activate the
NCV’s alarms. In this way, the VR40’s adjustable
sensitivity takes the guesswork out of identifying the
“hot” wire of a bundle.
Four additional features increase the versatility and
utility of the VR40:
• Because its tip can fit in the slots of 110VAC
receptacles, as it checks for voltage the VR40 also
indicates whether the receptacle is wired correctly, or
wired in reverse.
• A bright white LED flashlight
• An infrared thermometer (IRT) for non-contact
measurement of local surface temperatures. Using an
IRT is a safe, reliable way to detect and isolate
overload currents in motors and electrical conduit and
junction boxes. Measured temperatures are displayed
in °F or °C on a 4-digit (2000 count) LCD and
automatically held for 15 seconds after the IRT
activation button is released.
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