batteries are charged, the beeper will sound repeatedly
and the red LED under the translucent cap (Fig. 1,
Callout 2) will flash when the tip is in one of the slots.
Alternatively, briskly rub the tip of the VR40 through your
hair or against your skin; static electricity has more than
enough voltage to activate the beeper and LED.
Whenever the NCV detection circuit is active, the
icon will appear on the top line of the LCD.
Before checking whether an unknown 110VAC
outlet is energized
, it is important that you first
maximize the VR40’s sensitivity. To do so, while
pressing and holding the
NCV
button press the
IRT
button as many times as necessary until “four bars”
show on the NCV sensitivity level bar graph at the lower
right of the LCD.
To check whether an unknown 110VAC outlet is
energized, press and hold the
NCV
button while
inserting the blade tip of the VR40 into both slots of the
outlet, one at a time.
1. If the beeper sounds and the NCV detection LED near
the tip (Fig. 1, Callout 2) flashes when the tip is
inserted in the smaller slot of a modern 15A outlet
(right slot of left figure on next page), the outlet is
both energized and properly wired (the smaller
slot is “hot” and the larger slot is neutral).
14
