9-2 Uson 628 Operator’s Manual
9.3 Preventive Maintenance
The instrument should be serviced and calibrated regularly by an authorized
service engineer. As service intervals depend on the usage of the equipment, refer
to the supplier for advice of servicing frequency. It is suggested that this should be
performed at least once a year.
9.4 Fuse Replacement
There is a power fuse fitted in the on the rear panel of the tester, the fuse is type
T5.0A/250V, 20mm, glass.
To replace the fuse:
1. Ensure the tester is switched off and disconnected from the mains power
supply.
2. Unscrew the cover of the fuse holder on the rear panel.
3. Remove the fuse and discard.
4. Fit a new fuse of the same type and rating into the fuse holder.
5. Screw the fuse holder back into position.
Note: It is recommended that the reason why the fuse has blown is established and
rectified before power is re-applied.
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