Measuring Resistance - VOLTCRAFT VC252 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 resistance:
1. Switch on the DMM and select the Ω measurement mode.
2. Plug the red lead into the Ω terminal and the black lead into the COM terminal.
3. Check the measuring leads for continuity
by connecting both measuring probes to
one another. The multimeter should show
a resistance value of approx 0–0.5 Ω (in-
herent resistance of the test leads).
For low-impedance measurements of
Æ
<600 Ω, hold down the REL button for
approximately one second when the
measuring probes are short circuited.
This ensures that the inherent resist-
ance of the test leads does not affect
the resistance measurement. The dis-
play should show "0 Ω".
4. Connect the measuring probes to the object that you want to measure. The
measurement will be indicated 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 measuring range has been exceeded or
Æ
that the circuit is broken.
5. After taking a measurement, remove the leads from the measured object and
switch off the DMM.
When taking a resistance measurement, make sure that the points that
come into contact with the measuring prods are free from dirt, oil, solder
and other impurities. These substances may distort the measurement.
The REL button only works when a measured value is displayed. It can-
not be used when "OL" is displayed.
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