E) Current Measuring "A - VOLTCRAFT VC-420 Bedienungsanleitung

Proceed as follows to measure direct voltages "DC" (mV
- Turn the DMM on and select measuring function "mV ". The display shows "AC" and the unit "mV".
- Press "MODE" to switch to the direct current measurement range. The display shows
"DC" and the unit "mV".
- Plug the red measuring line into the V measuring jack (8) and the black measuring line
into the COM measuring jack (7).
- Connect the two measuring prods to the object to be measured in parallel (generator, circuit, etc.). The red measu-
ring prod indicates the positive pole, the black measuring prod the negative pole.
- The polarity of the respective measured value is indicated on the display together with the current measured
value.
- Remove the measuring lines from the object to be measured after completion of the measurement and switch off
the DMM.
If a minus "-" appears in front of the measured value for direct voltage, the measured voltage is negative (or
the measuring lines are swapped).
The voltage range "mV DC/AC" has an input resistance of ≥10 MΩ. With the measuring inputs open, the high
sensitivity may cause an undefined measured value to be displayed; however, this does not influence the
measuring result.

e) Current Measuring "A"

Do not exceed the maximum permitted input values. Do not touch any circuits or parts of circuits
if they may be subject to voltages higher than 33 V/ACrms or 70 V/DC! Danger to life!
The voltage in the measuring circuit must not exceed 1000 V.
Measuring >10 A must only be performed for max. 30 seconds and at 15 minute intervals.
Never measure any currents above 10 A in the 20 A range and no currents above 600 mA in the
mA/µA range; otherwise the fuses trigger.
Always start current measurements at the highest measurement range and switch down to lower
ranges if necessary. Before connection of the meter and before measurement range changes,
always power down the circuit. All current measurement ranges are secured with fuses and thus
protected against overload.
Proceed as follows to measure direct currents (A
- Switch on the DMM and select measurement range "10A
- The table shows the different measuring functions and possible measurement ranges. Select your measuring
function and the respective measuring jacks.
Measuring function
10A
mA
µA
Measurement range
<10 A (<20 A)
<600 mA
<6000 µA
):
):
".
Measuring jacks
COM + 10A
COM + µAmA
COM + µAmA
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