Non-Contact Ac Voltage Test "Ncv - VOLTCRAFT VC252 Operating Instructions Manual

12.13 Non-contact AC voltage test "NCV"

Make sure that all measuring sockets are unoccupied. Please remove all
measuring leads and adapters from the measuring device.
This function only serves as an aid. Prior to performing work on these
cables, you must perform contact measuring op-
erations to check for the absence of voltage.
Test this function beforehand on a known AC
voltage source.
1. Set the function dial to NCV, "EF" and "NCV" will show
on the display.
2. Guide the non-contact voltage sensor area to the test
location (max. 5 mm). For twisted cables, it is recom-
mended to touch the cable with the end of non-contact
voltage sensor.
If AC power is sensed, the tri-color indicator LED
Æ
will light up and the buzzer will sound.
The higher the voltage, the higher the frequency at
Æ
which the buzzer will beep.
The tri-color indicator LED will change from green to
Æ
yellow to red as the voltage increases.
3. When finished measuring, switch the power OFF.
77