Specifications

Model UT90B: OPERATING MANUAL
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when there is not any response on the
display during current measurement. Replace
the damaged fuse with identical model
number or electrical specifications.
To replace the fuse as follows:
1. Turn the Meter to OFF position, and remove
the test leads from terminals.
2. Take off the holster as figure 9 shows.
3. Remove the 3 screws from the case bottom,
separate the case bottom, then replace the
damaged fuse.
MAINTENANCE
This section provides basic maintenance
information including battery replacement
instruction.
Warning
Before remove the case bottom, make sure
the power is off, remove the test leads from
terminals and test circuit.
z Periodically wipe the case with a damp
cloth and a little mild detergent. Do not use
chemical abrasives or solvents.
z Please stop any operation of the Meter and
sent it outside to repair or service if there is
anything wrong.
z Do not attempt to repair of service your
Meter unless you are qualified to do so and
have the relevant calibration, performance