UNI-T UT81B User Manual

33
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

UNI-T UT81B Specifications

General

Backlight	Yes
Product type	Digital multimeter
Frequency range	0.01 - 10000 kHz
AC current range	0.4 - 10 A
AC voltage range	4 - 750 V
DC voltage range	0.4 - 1000 V
Dimensions (WxDxH)	100 x 48 x 200 mm
Battery voltage	1.5 V

Weight and Dimensions

Weight	498 g