19
To change the NCV sensitivity level, press the
button one or more times. Pressing the
button
once from a starting sensitivity of 4 changes the level
to 0, effectively disabling the NCV function. Pressing
the
button an additional one, two or three times
changes the sensitivity level to 1, 2 and 3,
respectively.
Once you have determined which level of NCV
sensitivity suits your application, use the
button
to set it to that level. After you disable the NCV
function or change its sensitivity level, you must then
save the setting by pressing the
HOLD
button. The
meter will remember this setting and resume
operation at that sensitivity level the next time it is
powered on, and even after a battery replacement.
••
Warning
••
The NCV detector in the CM660/700 is designed to
indicate the presence of AC voltage with an amplitude
between 12VAC and 600VAC. Accordingly, do
not
assume that the absence of a positive indication
means that the circuit under test is de-energized (not
“hot”). Although they can cause shock and/or serious
personal injury, voltages below 12V may not be
detected by the CM660/700. Whenever you have
reason to suspect that a line or outlet is “hot”,
confirm your suspicion by measuring the voltage of
the line or outlet using the test leads and with the
meter’s rotary function switch in the
position.
To check whether a line, cable or AC outlet is “hot”
(energized), touch it with the tip of the clamp jaw or
bring the tip within 1/4 inch of it. If the beeper sounds
repeatedly and the LED flashes rapidly, the line or
outlet is energized.
