B) Measuring Resistance - VOLTCRAFT VC-22 Operating Instructions Manual

Proceed as follows to measure "AC" voltages (V):
• Commission the DMM as described under "Measurement of DC voltage" and select the
measurement range "V".
• Connect the two probe tips to the object to be measured (generator, circuit, etc.).
• If necessary, press the Select button (3). The display shows AC.
• The measured value appears on display.
• After measuring, remove the test leads from the measured object and turn the multimeter off.
Turn the rotary switch to the "OFF" position.

b) Measuring resistance

Make sure that all objects that you wish to measure (including circuit compo-
nents, circuits and component parts) are disconnected and discharged.
Follow the steps below to measure the resistance:
• Switch on the DMM and select the measuring function "Ω".
• Press the Select button (3).
• Check the test leads for continuity by connecting both probe tips to one another.
• Thereupon a resistance of <0.5 Ohm must be set (inherent resistance of the measuring
leads).
• Connect the probe tips to the object that you want to measure. The measurement will be
indicated on display (2) (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.
• As soon as OL appears in the display, you have exceeded the measuring range or the
measuring circuit is interrupted.
• After measuring, remove the test leads from the measured object and turn the multimeter off.
Turn the rotary switch (4) to the "OFF" position.
When taking a resistance measurement, make sure that the points that come into contact
with the probe tips are free from dirt, oil, solder and other impurities. These substances may
distort the measurement.
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