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Model UT81B: OPERATING MANUAL
Figure 3-9. Measuring Frequency / Duty Cycle
To avoid harms to you, please do not attempt to
input voltage higher than 42V rms.
Warning
To measure frequency and duty cycle, connect the
Meter as Figure 3-9 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 Hz.
3. Connect the test leads across with the object being
measured.
4. The measured value shows on the display.
5. Press
MODE
button to toggle between Multimeter
mode and Scope mode.
6. Press F1 to toggle between frequency and duty cycle
measurement.
When measuring frequency and duty cycle, the
corresponding functional buttons:
Freq/Duty
F1
F1: toggle between frequency and duty cycle
