UNI-T UT81B User Manual

39
Model UT81B: OPERATING MANUAL
1.Remove the
battery compartment
2.Remove the
case bottom
3.Install fuses with
correct type and
specification
Figure 5-1. Fuse Replacement
B. Replacing the Fuses
To avoid electrical shock or arc blast, or personal
injury or damage to the Meter, use specified fuses
ONLY in accordance with the following procedure.
Warning
Follow Figure 5-1 and proceed as follows to replace
the Meter’s fuse:
Turn the rotary switch to OFF and remove all
connections from the terminals.
Remove the screw from the battery compartment,
and separate the battery compartment from the case
bottom.
Remove the three screws from the case bottom,
and separate the case bottom from the case top.
Remove the fuse by gently prying one end loose,
then take out the fuse from its bracket.
Install ONLY replacement fuses with the identical
type and specification as follows and make sure the
fuse is fixed firmly in the bracket.
Fuse 1: 0.5A, 250V, fast type fuse, ø5 x 20mm
Fuse 2: 10A, 250V, fast type fuse, ø5 x 20mm
Rejoin the case bottom and case top, battery
compartment and case bottom, and install the 5
screws.
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Replacement of the fuses is seldom required. Burning
of a fuse always results from improper operation.

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