UNI-T UT81B User Manual

36
Model UT81B: OPERATING MANUAL
Capacitors larger than 10 F take longer time.
If the tested capacitor has polarity, connect the red
test lead to positive side and black test lead to
negative side.
When capacitance measurement has been
completed, disconnect the connection between the
testing leads and the circuit under test and remove
the test leads away from the input terminals of the
Meter.
1.
2.
3.
4.
Insert the red test lead into theterminal and the
black test lead into the COM terminal.
Set the rotary switch to measurement mode, the
Meter may display a fixed reading which is a internal
distributed capacitor value. For testing less than
40nF capacitor, the tested value must subtract the
internal distributed capacitor value to maintain the
accuracy.
To improve the accuracy, press F2 REL with the
test leads open to subtract the residual capacitance
of the Meter and the test leads.
It is recommended to use as short as test lead
carrying out measurement to reduce the effect of
internal distributed capacitor.
When measuring capacitance, the corresponding
functional buttons:
Capacity REL
F1 F2
F2: relative mode
Note
l
l
l

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