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b) Measuring Voltage “V”
Proceed as follows to measure DC voltages „DC“ (V ):
- Turn the DMM on and select measuring range “V ”. For lower
voltages, up to max. 200/400 mV, select the measuring range “mV
“.
- Plug the red measuring lead into the V measuring socket (7) and the
black measuring lead into the COM measuring socket (8).
- Now connect the two measuring probes to the object to be measured
(battery, switch etc.). The red measuring tip indicates the positive
pole, the black measuring tip the negative pole.
- The polarity of the respective measured value is indicated on the display together with the current
measured value.
☞
If a minus “-” appears in front of the voltage value when measuring DC, the measured
voltage is negative (or the measuring tips have been mixed up).
The voltage range “V DC/AC” exhibits an input resistance of >10 MOhm, the “mV DC”
measuring range for the VC270 and VC290 is >4000 MOhm.
- After measuring, remove the measuring leads from the measured object and turn the DMM off.
Proceed as follows to measure AC voltages (V ):
- Turn the DMM on and select measuring range “V ”. Press “SELECT” (10) on the VC 290 to
switch to the AC range. “AC” appears on the display.
- Plug the red measuring lead into the V measuring socket (7) and the black measuring lead into the
COM measuring socket (8).
- Now connect the two measuring probes to the object to be measured (generator, switch etc.).
- The measuring value is indicated on the display
- After measuring, remove the measuring leads from the measuring object and turn the DMM off.
c) Measuring Current “A”
ƽ
Do not exceed the maximum permitted input values. Do not touch circuits or parts
of circuits if there could be voltages higher than 25 V ACrms or 35 V DC present
within them! Risk of fatal injury!
The voltage in the measuring circuit may not exceed 600 V.
Measurements in the > 5 A range may only be performed for max. 10 seconds and
at 15 minute intervals.
Always start current measurements at the highest measurement range and switch
down to lower ranges if necessary. Before changing the measurement range,
always shut off the circuit. All current measuring ranges are provided with fuses
and thus protected against overload.
