Measuring Resistance - VOLTCRAFT VC272 Bedienungsanleitung

12.8 Measuring resistance

Make sure that all objects that you wish to measure (including circuit
components, circuits and component parts) are disconnected and dis-
charged.
Follow the steps below to measure the re-
sistance:
1. Switch the DMM on and select the Ω
measurement mode.
2. Insert the red test lead into the Ω meas-
urement socket and the black test lead
into the COM measurement socket.
3. Check the test leads for continuity by
connecting both measuring probes to
one another. The multimeter should
then show a resistance value of approx
0 - 0.5 Ω (inherent resistance of the test
leads).
For low-impedance measurements of <600 Ω, hold down the REL button for
Æ
approximately one second when the measuring probes are short circuited.
This ensures that the inherent resistance of the test leads does not affect
the resistance measurement. The display should show "0 Ω". Auto range is
thereby disabled.
4. Connect the measuring probes to the object that you want to measure. The
measurement will be shown on the display (provided that the object you are
measuring is not highly resistive or disconnected). Wait until the display stabi-
lises. This may take a few seconds for resistances greater than 1 MΩ.
"OL" (overload) indicates that the measurement range has been exceeded
Æ
or that the circuit is broken.
5. After taking a measurement, remove the leads from the measured object and
switch the DMM off.
When taking a resistance measurement, ensure that the points that come
into contact with the measuring probes are free from dirt, oil, solder and
other impurities. These substances may distort the measurement.
The REL button only works when a measurement is displayed. It cannot
be used when "OL" is displayed.
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