VOLTCRAFT VC-20 - B) Frequency Measurement; C) Duty Cycle

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b) Frequency measurement
The DMM can be used to measure and indicate signal voltage frequencies.
Proceed as follows to measure frequencies:
- Turn the DMM on at the rotary switch (1) andselect measuring
range „V Hz %“. Press „Hz %“ (9) to change to the frequency
range. The display reads „Hz“.
- Now connect the two test prods with the object to be measured
(signal generator, circuit etc.).
- The frequency and corresponding unit are displayed.
c) Duty cycle
The duty cycle function determines the ratio of the positive half-
wave of a signal voltage to the entire signal waveform within a
certain period in percent.
Proceed as follows to measure the duty cycle:
- Turn the DMM on at the rotary switch (1) andselect measuring range „V Hz %“. Press „Hz %“
(9) twice to switch to duty cycle mode. The display indicates „%“.
- Now connect the two test prods with the object to be measured (signal generator, circuit etc.).
- The duty-cycle is indicated on the display.