Chapter II
22
Portable digital multimeter
3.5. Multimeter
maintenance
3.5.1. Fuse
self-test
When fuse F1 (0.63 A) or F2 (11 A) is blown, the display shows “FUSE.1” or “FUSE.2”,
accordingly.
If both fuses are blown, the display shows “FUSES”.
Replace the fuse or fuses concerned.
)
Note
Fuse F1 cannot be tested unless the switch is set to a mA position.
Fuse F2 is located in the common circuit. Therefore, all measurements
become impossible when it is out of service.
3.5.2. Battery
self-test
When the BAT indication appears on the display, the instrument still has approximately
50 hours of operation, but specifications can no longer be guaranteed.
Replace the battery.
3.5.3. Replacing the battery or fuses
Disconnect the cords from the measured circuit, then multimeter.
Open the multimeter casing as follows (see last page of the manual) :
1 – Remove the stand from the back of the instrument.
Figures 1 and 2
2 – Remove the front cover using the stand as a lever.
Figures 3 and 4
3 – Remove the gasket.
4 – Replace the battery or fuse.
Before use, make sure that the gasket, then the front cover are carefully set back on the
instrument.
3.5.4. Cleaning
Clean the multimeter using a damp cloth. Do not use abrasives or solvents.
