Duty cycle (%) =
pulse duration
cycle duration
X 100
13 Frequency & Duty Cycle Measurement
13.1 Frequency Measurement
a)
Set the function selector switch to V~/Hz/% and press Yellow
multi-function key, as shown on page 21.
The frequency measurement mode is activated. "Hz" symbol
is displayed on the LCD. The digital display is expanded to
9999 digits. Only the auto mode is possible, no manual range
is possible.
b) Connections are made the same way as for voltage
measurement.
c) The lowest measurable frequencies and the maximum
allowable voltages can be found in the chapter 15.
"Specifications".
13.2 Duty Cycle Measurement
a) With duty cycle measurement, we can determine the ratio
of pulse duration to cycle time of recurring square wave
signals. The duty cycle that is the percentage pulse duration
of signal is displayed on LCD i.e.
Note : The applied frequency must remain constant during
the duty cycle measurement.
b) Set the function selector switch to V~/Hz/% and press
yellow multi-function key twice as shown on page 21.
The duty cycle (%) mode is activated. "%" symbol is
displayed on LCD.
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