The following information should be observed when measuring
resistance and continuity:
n
The component to be measured must not be connected to the
power supply during the measurement.
n
At least one side of the component to be measured must be
disconnected from the circuitry, as otherwise the measuring
result may be influenced by parallel components.
n
Polarity is of no significance.
Voltage and voltage drop measurement with multimeter
n
Measurement at the voltage source measures the currently
available voltage.
n
The meter is always connected parallel to consumer, compo-
nent or power source.
n
A measurement at the consumer measures the voltage drop at
this component.
Fig. 40
Fig. 41: Measuring voltage
Fig. 42: Voltage measurement
Electric systems – Basic principles
BW 900-50
66
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