Measuring Resistance - VOLTCRAFT VC-533 Bedienungsanleitung

• After measuring, remove the sensor and turn off the multimeter.
If no temperature sensor is connected, the ambient temperature of the DMM can be displayed using a
jumper between the two measurement sockets ("COM" and "Temp"). As the sensor is located inside the
housing, the display reacts very slowly to temperature fluctuations. This function helps you check that the
DMM is at the correct operating temperature after storage. An external sensor must be used for quick
measurements.
g) Measuring resistance
Make sure that all objects that you wish to measure (including circuit components, circuits and
component parts) are disconnected and discharged.
Follow the steps below to measure the resistance:
• Turn on the DMM and select the "Ω" measurement mode.
• Plug the red lead into the Ω terminal (K) and the black lead into the COM
terminal (I).
• Check the measuring leads for continuity by connecting both measuring
probes to one another. The multimeter should show a resistance value of ap-
prox 0 - 0.5 Ω (inherent resistance of the test leads).
• For low-impedance measurements (<400 Ohm), press the "REL" button to dis-
count the inherent impedance of the test leads in the subsequent resistance
measurement. A small delta symbol will appear on the display and the main
display will show 0 Ohm. Automatic range selection (AUTO) is now disabled.
For all other measurements, the inherent resistance of the test leads is neg-
ligible. Press the "REL" button again to disable the reference value function.
Automatic range selection is now enabled.
• 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
stabilises. This may take a few seconds for resistances greater than 1 MΩ.
• "OL" (overload) indicates that the measuring range has been exceeded or that
the circuit is broken.
• After measuring, remove the test leads from the measured object and turn the multimeter off.
When taking a resistance measurement, make sure that the points that come into contact with the measur-
ing prods are free from dirt, oil, solder and other impurities. These substances may distort the measure-
ment.
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