I) Frequency Measuring / Duty Factor - VOLTCRAFT VC950 Bedienungsanleitung

i) Frequency Measurement / Period Duration / Scanning Rate (Duty Factor)
Do not exceed the maximum permitted input values. Do not touch any circuits or parts of circuits if
they may be subject to voltages higher than 25 V ACrms or 35 V DC! Danger to life!
The maximum permissible voltage in the current measuring circuit may not exceed 1,000 V in CAT III.
The DMM can be used to measure and indicate signal voltage
frequencies from 0.001 Hz to 4 MHz. The period duration and
scanning rate can also be selected. Observe that the maximum
values (also see chapter Technical Data) must not be exceeded
while measuring.
Proceed as follows to measure frequencies:
- Switch on the DMM and select measuring range "Hz %" with
the rotary control (4).
- Plug the red measuring line into the Hz measuring jack (7) and
the black measuring line into the COM measuring jack (8).
- Connect the two measuring prods to the object to be measured
(signal generator, circuit, etc.).
- The frequency and corresponding unit are displayed.
- Above the frequency display, either the period duration is dis-
played in ms or the scanning rate (duty factor) in %. Select the
corresponding display by pressing the button
- Remove the measuring lines from the object to be measured
after completion of the measurement and switch off the DMM.
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