Bosch GLM400C Consignes D'utilisation Et De Sécurité page 40

Measuring result not plausible
The target surface does not
reflect correctly (e.g. water,
glass).
Laser beam output 20,
reception lens 18 or digital
viewfinder 19 is covered.
Wrong reference level set.
Obstruction in path of laser
beam.
error, have the measuring tool checked by an after-sales
service agent for Bosch power tools.
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The measuring tool monitors the correct function
for each measurement. When a defect is
determined, only the symbol shown aside flashes
in the display. In this case, or when the above
mentioned corrective measures cannot correct an
Cover off the target surface.
Keep the laser beam output
20, reception lens 18 and
digital viewfinder 19 clear.
Select reference
that corresponds
measurement.
Laser point
completely on target surface.
level
to
must be
4/6/18 8:20 AM