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Voltcraft VC271 TRMS Manual

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53
j) 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:
- SwitchontheDMMandselectthe“Ω”measurementmode.
- PlugtheredleadintotheΩterminal(G)andtheblackleadintothe
COM terminal (H).
- 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(inherentresistanceofthetest
leads).
- For low-impedance measurements of <600 Ω, hold down the
“REL” button (C) for approximately one second when the meas-
uring probes are short circuited. This ensures that the inherent
resistance of the test leads does not affect the resistance meas-
urement.Thedisplayshouldshow0Ω.
- Connect the measuring probes to the object that you want to
measure. The measurement will be indicated on the display (pro-
vided 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 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 cannot be used when “OL” is
displayed.
… 53 …


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