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34 | English
Errors – Causes and Corrective Measures
Cause
Temperature monitoring indicator (k) and warning indicator (j) light up, it is not
possible to take a measurement
The measuring tool is outside of
the operating temperature range,
or has been subjected to large
fluctuations in temperature.
Radio interference indicator (i) and warning indicator (j) light up
Measurements are impaired by
electric, magnetic or electromag-
netic fields (such as mobile
phones, laptops or tablets near
the measuring tool).
Warning indicator (j) flashes
The measuring tool has developed
a fault and is no longer functional.
Metal object indicator and continuously high amplitude in the measuring indicator
(b), even though there is no metal object near the measuring tool
The factory calibration is no longer
valid (e.g. if the measuring tool
falls from great height).
Light-up ring (1) does not light up when it is positioned on the surface
The surface cannot be detected
because the sensor area (17) is
dirty.
Contact with the wall or surface
may not be detected due to partic-
ular wall properties (e.g. a very
dark surface).
1 609 92A 92B | (17.11.2023)
Remedy
Switch the measuring tool off and allow it to adjust
to the ambient temperature before switching it back
on. It is only possible to take exact measurements if
the temperature inside the measuring tool remains
constant.
If possible, deactivate all tools whose radiation
could interfere with the measurement and switch off
the corresponding functions or tools.
Send the measuring tool to an authorised Bosch
after-sales service centre.
Manually recalibrate the measuring tool (see "Recal-
ibrating the Measuring Tool", page 35).
Clean the measuring tool with a soft, dry cloth and
re-start the measurement.
Position the measuring tool on the surface. For
manual wall detection, press and hold the metal/
electricity (4) and wood (5) buttons simultaneously
until the light-up ring (1) is lit (for approx. 3 s) and
an audio signal sounds. Then perform a measure-
ment as usual.
Note: Before taking the next measurement on a dif-
ferent surface, you must reset the manual wall de-
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