Measuring Frequency / Duty Cycle - UNI-T UT71C Operating Manual

Model UT71C/D/E: OPERATING MANUAL
G. Measuring Frequency / Duty Cycle
Warning
To avoid harms to you, please do not attempt to input
voltage higher than 30V rms.
To measure frequency and duty cycle, connect the
Meter as Figure 3-7 and do the following:
1. Insert the red test lead into the Hz terminal and
the black test lead into the COM terminal.
2. Set the rotary switch to
(UT71E) and press BLUE button to select the
ºC ºF
Hz measurement mode for frequency measurement
or % for duty cycle measurement.
The BLUE button cycles among
and duty cycle for UT71C and UT71E.
3. Connect the test leads across with the object being
measured.
The measured value shows on the primary display.
(UT71C/D) or
mV , frequency
Figure 3-7. Frequency / Duty Cycle Measurement
41