H) Contact-Free Ac Voltage Detection "Ncv; I) Frequency Measuring - VOLTCRAFT 12 29 00 Operating Instructions Manual

h) Contact-Free AC Voltage Detection "NCV"

The "NCV" detector is placed on the top of
the housing and reacts only to alternate vol-
tages 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, freedom
from voltage must be verified with the tradi-
tional contact test method (phase tester)!
- The measuring leads are not required.
- Turn on the DMM and select any measuring function.
Contact-free voltage detection is active in all measuring
functions.
- 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.
- Where a live line is discovered, the "NCV" lighted display
(13) lights up.
- Switch off DMM after measuring.
Shielded lines, lines that are too deep or twi-
sted wires may negatively influence the dis-
play.

i) Frequency Measuring

- Turn the DMM on and select measuring function "Hz".
- Plug the red measuring lead into the V measuring socket
(9) and the black measuring lead into the COM measuring
socket (8).
- Now connect the two measuring prods to the object to be
measured (generator, signal, etc.).
- The currently measured value is indicated on the display
- After measuring, remove the measuring lines from the
measured object and turn the DMM off.
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