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Voltcraft VC165 Manual

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35
b) Voltage measuring “V”
Proceed as follows to measure direct voltages “V/DC” (V ):
- Switch on the DMM and select the respective measuring
range “V
“ or “mV ”.
- Plug the red measuring line into the V measuring jack (7)
and the black measuring line into the COM measuring
jack (6).
- Connect the two measuring prods to the object to be meas-
ured (battery, circuit, etc.). The red measuring prod indicates
the positive pole, the black measuring prod the negative
pole.
- The current 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.
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 MOhm.
Proceed as follows to measure alternating voltages “V/AC” (V
):
- Switch on the DMM and select the respective measuring range “V
“ or “mV ”.
- For the measuring function “mV “, push the button “SELECT” once briey. The meter switches the alternating volt-
age measurement. Pushing again switches back to the direct voltage measurement.
-
Plug the red measuring line into the V measuring jack (7) and the black measuring line into the COM measuring jack (6).
- Connect the two measuring prods to the object to be measured (battery, mains voltage, etc.).
- The current measured value is indicated on the display.
- Remove the measuring lines from the object to be measured after completion of the measurement and switch off
the DMM.
The voltage range V/AC” has an input resistance of >10 MΩ.
c) Current measuring “A“
The maximum permissible voltage in the measuring circuit against ground potential must not
exceed 600 V in CAT II and III.
Current measurement always takes place in series with the consumer. Before connecting the meter, the circuit must
be powered down. After the end of measuring, power down the circuit before removing the measuring lines. This
prevents the occurrence of light arcs.
Current measurements >5 A must only be performed for max. 10 seconds and with measuring breaks of 15 minutes.
The internal resistance of the meter causes a low voltage drop in the measuring circuit (max. 200 mV) because of
the integrated fuse in the mA/µA measuring range. However, this is usually negligible.
… 35 …


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