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d) Frequency Measuring
The DMM can be used to measure and indicate signal voltage
frequencies from 0.001 Hz to 10 MHz.
Proceed as follows to measure frequencies:
- Turn the DMM on and select measuring range “Hz”. The
display reads “Hz”.
- Plug the red measuring line into the Hz measuring jack and
the black measuring line into the COM measuring jack (8) .
- Now connect the two measuring prods to the object to be
measured (signal generator, switch etc.).
- The frequency and corresponding unit are displayed.
- After measuring, remove the measuring lines from the
measured object and turn the DMM off.
e) Resistance Measuring
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Make sure that all the circuit parts, switches and components and other objects of
measurement are disconnected from the voltage and discharged.
Proceed as follows to measure the resistance:
- Turn the DMM on and select measuring range “Ω”.
- Plug the red measuring line into the Ω measuring jack and
the black measuring line into the COM measuring jack (8) .
- Check the measuring lines for continuity by connecting
both measuring prods with one another. The resistance
value must be approximately 0 - 1.5 Ohm (inherent resi-
stance of the measuring lines).
- For low-impedance measurements, press the button
“REL” (10) to not let the inherent resistance of the measu-
ring lines flow into the following resistance measuring.
The display shows the delta symbol and 0 Ohm are indi-
cated. The automatic range selection (auto range) is inac-
tive.
- Now connect the measuring prods to the object to be
measured. As long as the object to be measured is not high-Ohm or interrupted, the measured value
will be indicated on the display. Wait until the displayed value has stabilised. With resistances of
>1 MOhm, this may take a few seconds.
