E) Non-Contact Ac Voltage Test "Ncv - VOLTCRAFT VC-22 Operating Instructions Manual

e) Non-contact AC voltage test "NCV"

Make sure that all measuring sockets are unoccupied. Please remove all test
leads from the measuring device.
This function only serves as an aid. When working on these cables, it is essen-
tial to carry out preliminary contact measurements for no voltage.
• Switch on the DMM and select the measuring function "NCV".
• Check this function in advance on a known AC voltage source.
• Guide the measuring device with the sensor surface (1) at a distance of maximum 10 mm
to the site to be tested.
• For twisted lines, it is advisable to check the cable to a length of about 20 - 30 cm.
• When a voltage is detected, an acoustic signal sounds, the display shows a dash and the
NCV LED flashes green.
• The closer you get to the voltage source, the faster the acoustic signal sounds, the display
shows several dashes (maximum 4) and the NCV LED flashes yellow first and then changes
to red in the immediate vicinity of the power source.
• Switch off the DMM after measuring. Turn the rotary switch to the "OFF" position.
Due to the sensitivity, static fields can also be displayed when touching. This is normal
and does not affect the test result.
33