H) Capacity Measuring; I) Contact-Free Ac Voltage Detection "Ncv - VOLTCRAFT VC-585 Bedienungsanleitung

h) Capacity Measuring

Make sure that all circuit parts, circuits and components and other objects of measurement are
disconnected from the voltage and discharged.
Always observe polarity with electrolyte capacitors.
- Switch on the DMM and select measuring range
- Plug the red measuring line into the V measuring jack (10) and the black measur-
ing line into the COM measuring jack (9).
- The display shows the unit "nF".
Due to the sensitive measuring input, the display may show a low value if
the measuring lines are "open". By pressing the button "REL", the display
is set to "0". The REL function is only sensible at low capacities.
- Now connect the two measuring prods (red = plus/black = minus) with the object
to be measured (capacitator). After a short time the display shows the capacity.
Wait until the displayed value has stabilised. This may take a few seconds for
capacities of >40 µF.
- If "OL" (overload) appears on the display, you have exceeded the measurement
range.
- Remove the measuring lines from the object to be measured after completion of
the measurement and switch off the DMM.

i) Contact-free AC voltage detection "NCV"

The voltage detector only serves quick tests and never contacted two-pole voltage testing. The
method is not permitted to verify freeness from voltage for work.
The NCV function ("Non-Contact-Voltage Detection") leads to contact-free detection of the presence of an alternating
voltage in electrical conductors. The NCV sensor (1) is attached at the top of the current sensor.
- Switch on the DMM and select the measuring range "NCV". The display shows "EF" (elec-
trical field).
- Bring the NCV sensor as close as possible towards the electrical conductor. The distance
must not exceed 10 mm.
- If alternating voltage is detected, the red NCV-LED (3) will flicker. Depending on signal
strength, up to 4 bars are displayed and a rising signal sounds.
- The highly sensitive NCV sensor may also cause the LED to light up at static charge. This
is normal and not a malfunction.
Always test the NCV function at a known AC voltage source to avoid incorrect detection. There is a danger
of electric shock at incorrect detection.
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