Maintenance And Service - Bosch Professional GMS 120 Manual

Recalibration
If the measuring indicator (i) indicates a continuously high amplitude in the Metal operat-
ing mode, even though there is no metal object near the measuring tool, the measuring
tool can be manually recalibrated.
– Ensure that the battery indicator (h) still shows a capacity of at least 1/3.
– Switch the measuring tool off.
– Remove all objects near the measuring tool that could be detected (including watches
or metal rings).
Hold the measuring tool up horizontally so that the rear side of the measuring tool is
pointing towards the floor.
Avoid bright light sources and prevent direct sunlight from shining on the rear side of
the measuring tool, without covering this area.
– Press the on/off button (5) and the audio signal button (7) simultaneously and hold
both buttons until the light-up ring (1) lights up red. Then release both buttons.
– If the calibration was successful, the measuring tool will start automatically after a few
seconds and will be ready for operation again.
Note: If the measuring tool does not start automatically, repeat the recalibration. If the
measuring tool still does not start, send it in its protective bag (19) to an authorised
Bosch after-sales service centre.

Maintenance and Service

Maintenance and Cleaning
Check the measuring tool before each use. If the measuring tool is visibly damaged
u
or parts have become loose inside the measuring tool, safe function can no longer be
ensured.
Always keep the measuring tool clean and dry to ensure optimum, safe operation.
Never immerse the measuring tool in water or other liquids.
Wipe off any dirt using a dry, soft cloth. Do not use any detergents or solvents.
Do not remove the contact pads (12) on the rear side of the measuring tool.
Only store and transport the measuring tool in the protective bag provided.
If the measuring tool needs to be repaired, send it off in the protective bag.
After-Sales Service and Application Service
Our after-sales service responds to your questions concerning maintenance and repair of
your product as well as spare parts. You can find explosion drawings and information on
Bosch Power Tools
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