Prokit's Industries MT-1820 - Manual (Page 23)

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tightening the bottom case
4. Please remove the test lead from the tested point and turn the
power off before replacing the battery or fuse.
FAULT ELIMINATION
If the instrument does not work properly, the below methods can
help you to solve the problems quickly. If the fault still can’t be
eliminated, please contact the maintenance center or the
distributors:
Fault Solution
No display
Power off – turn on the power
Hold Key- set a correct mode
Replace battery
symbol appearance
Replace battery
No current input
Replace fuse
Error value
Replace battery
The instruction manual is subject to change without notice.
The contents in the instruction manual are considered to be correct, if the users find any
errors or pretermission, etc., please contact the manufacturer.
The manufacturer hereby will not be responsible for any accident and damage caused by
the improper operation.
The functions described in this instruction manual do not be the reason for special usage.