To detect the presence of AC voltage on an
individual line or cable
, position the blade tip within
1/4 inch of the line or cable and press and hold the
NCV
button. If the beeper sounds and the LED lights,
the line or cable is “hot” (energized). If you do not get
both positive indications, touch the tip to all four sides
of the line or cable. If the beeper sounds and the LED
lights, the line or cable is “hot” (energized). If you still
do not get positive indications, the line or cable is de-
energized.
To determine whether a device powered by 480VAC
(a generator or ballast, for example) is energized
,
simply position the tip of the VR40 near it. If the beeper
sounds and the LED lights, the device is “hot”
(energized). If you do not get both positive indications,
the device is de-energized.
USING THE IRT TO MEASURE TEMPERATURE
To use the VR40’s integrated IR thermometer to
measure the temperature of a surface
, point the front
of the unit at a surface and press and hold the
IRT
button. Note that this activates the laser pointer of the
VR40’s integrated IR thermometer and causes the
icon to appear at the top right of the LCD. Use the laser
pointer to “zero in” on the target—the object or surface
whose temperature you wish to measure. The
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