VOLTCRAFT MT-52 Bedienungsanleitung Seite 45

11.8 Contact-free AC voltage detection "NCV"
The "NCV" detector is placed on the top of the housing and
reacts only to alternate voltages between 200 and 1000 V/AC�
This function is only used for quick search for alternate voltage-
conducting lines and cables� For work at the power lines, free-
dom from voltage must be verified with the traditional contact
test method (phase tester)!
1� The measuring leads are not required�
2� Turn on the DMM and select any measuring function� Contact-free volt-
age detection is active in all measuring functions�
3� Move the DMM with the "NCV" sensor (upper housing edge) along the
test object� The detection depth reaches from approx� 3 cm at 230 V/AC
to approx� 8 cm at 1000 V/AC�
4� Where a live line is discovered, the "NCV" lighted display (13) lights up�
5� Switch off DMM after measuring�
Shielded lines, lines that are too deep or twisted wires may
negatively influence the display.
11.9 Frequency measurement
1� Turn the DMM on and select measuring function "Hz"�
2� Plug the red measuring lead into the V measuring socket (9) and the
black measuring lead into the COM measuring socket (8)�
3� Now connect the two measuring prods to the object to be measured
(generator, signal, etc�)�
4� The currently measured value is indicated on the display
5� After measuring, remove the measuring lines from the measured
object and turn the DMM off�
NCV Sensor
NCV Sensor
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