Troubleshooting - Brother HD-390I Operator's Instruction Manual

Professional analogue multimeter
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Troubleshooting

Nevertheless, problems or malfunctions may occur.
For this reason, the following is a description of how you can
eliminate possible malfunctions yourself:
Error
The multimeter does
not work.
No measurements
possible via V/mA
socket.
No measurements
possible via 10A
socket.
No change in
measured values.
Faulty measuring
results are displayed.
Possible cause
Are the batteries exhausted? Or the
inner batteries bad contacted?
Check the status of the batteries and
if the fuse 0.5A is good or contacted
well.
Is the fuse defective? Check the fuse
0.5A (fuse replacement)
Is the fuse defective? Check the fuse
10A (fuse replacement)
Have you selected the right
measuring sockets? Is the measuring
range/mode correct (AC/DC)?
Has null balancing of the display or a
0 Ohm calibration for the resistance
measurement been carried out? Is
the batteries not properly assembled
in?
13

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