Measuring Alternate Current; Diode Test - VOLTCRAFT VC-2020 Bedienungsanleitung

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e) Measuring alternate current
In no event exceed the max. permitted input values in the respective measuring ranges. Current
measuring operations are only admissible in circuits up to 500V. Always disconnect the power
from the measuring circuit before you connect the measuring device, change the measuring ran-
ge or terminate the measuring operation.
Alternate current measurements are only possible in the 5A
measuring range.
Proceed as follows to measure AC currents:
- Select the measuring range 5A
- Connect the black measuring line with the COM socket (78 and the
red measuring line with the 5A socket (7).
- Now perform null balancing.
- Now connect the two measuring prods in series to the object to be
measured (battery, switch etc.).
- Read off the measuring value on the scale "ACA".
f) Diode test
The continuity voltage of a diode is determined with the diode test. The VC-2020 additionally displays the
operating voltage of LEDs.
For this measurement, proceed as follows:
- Select the measuring range
rotary switch.
- Connect the black measuring line with the COM socket (8) and the red
measuring line with the V/Ω socket (9).
- Now perform null balancing.
- Now connect the two measuring prods with the object to be measured
(diode).
- Read the measuring value for the continuity voltage (UF) on the
scale "LV".
- The operating current of LEDs is signalled on the scale "LI".
The operating current (in the Ohm measuring range) can be
selected from 60 µA to 150 mA. Attention! Excess current
may damage the component!
- If there is no display, the diode is measured in reverse direction (UR)
or the diode is defect (interruption).
on the rotary switch.
"x10Ω/15 mA" with the
5A
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