C) Direct Voltage Measurement "V/Dc; D) Loz Alternating Voltage Measurement "V/Ac - VOLTCRAFT VC-440 E Bedienungsanleitung

c) Direct Voltage Measurement "V/DC"

Proceed as follows to measure direct voltages "DC" (V
- Turn the DMM on and select measuring function "V
- Press "SELECT" to switch to the direct current measurement range. The
display shows "DC" and the unit "V".
- Plug the red measuring line into the V measuring jack (E) and the black
measuring line into the COM measuring jack (D).
- Connect the two measuring prods to the object to be measured in paral-
lel (generator, circuit, etc.). The red measuring 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 "V/DC" has an input resistance of ≥10 MΩ. This will put barely any strain on the circuit.

d) LoZ alternating voltage measurement "V/AC"

The LoZ measuring function permits alternating voltage measurement with low impedance (approx. 300 kΩ). The
lower internal resistance of the meter reduces wrong measurement of scatter and phantom voltages. The measuring
circuit is, however, subject to higher strain than with the standard measuring function.
Proceed as follows to measure alternating voltages "AC " (LoZ V
- Turn the DMM on and select measuring function.
- "LoZ V ". The display shows "LoZ AC" and the unit "V".
- Plug the red measuring line into the V measuring jack (E)
and the black measuring line into the COM measuring
jack (D).
- Connect the two measuring prods to the object to be
measured in parallel (generator, circuit, etc.).
- The measured value is indicated on the display.
- Remove the measuring lines from the object to be meas-
ured after completion of the measurement and switch off
the DMM.
The voltage range "LoZ V/AC" has an input re-
sistance of <300 kΩ. This will put a slight strain
on the circuit.
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