Frequency Measurement; G) Measurement Of Pulse Duration In - VOLTCRAFT VC276 TRMS Bedienungsanleitung

f) Frequency measurement
The DMM can be used to measure the frequency of a signal volt-
age (supports frequencies from 10 Hz to 10 MHz). The maximum
input is 20 Vrms. This mode is not suitable for taking measure-
ments on mains voltages. Observe the input specifications in the
technical data.
Proceed as follows to measure frequency:
- Switch the DMM on and select "Hz" mode. "Hz" will appear on
the display.
- Insert the red test lead into the Hz measurement socket (G)
and the black test lead into the COM measurement socket (H).
- Connect the two measuring probes to the object that you want
to measure (e.g. signal generator or circuit).
- The frequency and corresponding unit will be displayed.
- After taking a measurement, remove the leads from the meas-
ured object and switch the DMM off.

g) Measurement of pulse duration in %

The DMM can be used the ratio of the pulse duration of an alter-
nating voltage signal's positive half wave as a percentage of the
entire period. The maximum input is 20 Vrms. This mode is not
suitable for taking measurements on mains voltages. Observe
the input specifications in the technical data.
Proceed as follows to measure the pulse duration in %:
- Switch the DMM on and select the "Hz" measurement range.
"Hz" will appear on the display. Press the "SELECT" button (I)
on the rotary control. "%" will appear on the display.
- Insert the red test lead into the Hz measurement socket (G)
and the black test lead into the COM measurement socket (H).
- Connect the two measuring probes to the object that you want
to measure (e.g. signal generator or circuit).
- The pulse duration of the positive half wave is shown as a
percentage value on the display.
- After taking a measurement, remove the leads from the meas-
ured object and switch the DMM off.
57