Frequency Measurement (Electronic) - VOLTCRAFT VC-420 Mode D'emploi

j) Frequency Measurement (electronic)
The DMM can be used to measure and indicate signal voltage frequencies up to 10 MHz. The maximum input range
is 15 Vrms. This measuring function is not suitable for mains voltage measurements. Please observe the input values
in the technical data.
For mains voltage measurements, use the additional functions "Hz" and "%" in the corresponding voltage and
current measurement ranges.
Proceed as follows to measure frequencies:
- Turn the DMM on and select measuring function "Hz". The display
reads "Hz".
- Plug the red measuring line into the Hz measuring jack (8) and the
black measuring line into the COM measuring jack (7).
- Connect the two measuring prods to the object to be measured in
parallel (signal generator, circuit, etc.).
- The frequency and corresponding unit are displayed.
- Remove the measuring lines from the object to be measured after
completion of the measurement and switch off the DMM.
Proceed as follows to measure the pulse ratio of the positive half-wave in %:
- Switch on the DMM and select measurement range "Hz". The display reads "Hz". Push
the button "Hz%". The display indicates "%".
- Plug the red measuring line into the Hz measuring jack (8) and the black measuring line
into the COM measuring jack (7).
- Connect the two measuring prods to the object to be measured in parallel (signal
generator, circuit, etc.).
- The pulse duration of the positive half wave is displayed as a percentage. 50% is displayed for a symmetrical
signal.
- Remove the measuring lines from the object to be measured after completion of the measurement and switch off
the DMM.
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