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12.11 Measurement of pulse duration in %
The DMM can be used to measure the ratio of the pulse duration of an alternating
voltage signal’s positive half wave as a percentage of the entire period. The maxi-
mum 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 take a pulse frequency measurement:
1. Switch the DMM on and select
the
Hz
measurement range.
“Hz” will appear on the display.
2. Press the
SEL
/
button on
the rotary control. “%” will ap-
pear on the display.
3. Insert the red test lead into the
Hz
measurement socket and
the black test lead into the
COM
measurement socket.
4. Connect the two measuring
probes to the object that you
want to measure (e.g. signal
generator or circuit).
Æ
The pulse duration of the
positive half wave is shown as a percentage value on the display.
5. After taking a measurement, remove the leads from the measured object and
switch the DMM off.
