Bosch GTL 3 Professional Originalbetriebsanleitung Seite 22

22 | English
Deactivating the Automatic Shut-off
The measuring tool switches off automatically
after an operating duration of 30 minutes.
To deactivate the automatic switch-off, press
the On/Off button 3 for 3 s when you switch
on the measuring tool. When the automatic
switch-off is deactivated, the laser lines flash
briefly to confirm after the switching on.
Do not leave the switched on measuring
tool unattended and switch the measur-
ing tool off after use. Other persons
could be blinded by the laser beam.
To activate the automatic switch-off, switch
the measuring tool off and switch it on again
by pressing briefly the On/Off button 3. After
the switching on, the laser lines do not flash.
Angular accuracy
Influences on Accuracy
The ambient temperature has the greatest in-
fluence. Especially temperature differences
occurring from the ground upward can divert
the laser beam.
Therefore, position the measuring tool as
near as possible to the work surface and fix
it with the underside as parallel as possible
to the work surface.
Apart from exterior influences, device-spe-
cific influences (such as heavy impact or fall-
ing down) can lead to deviations. Therefore,
check the accuracy of the measuring tool
each time before starting your work.
1 609 929 S09 | (15.10.08)
Checking the angular accuracy
For this check, you need a free surface of ap-
prox. 10 x 5 m on a stable and even base.
Should the measuring tool exceed the maxi-
mum deviation during one of the tests, please
have it repaired by a Bosch after-sales service.
Checking the angular accuracy between
the 0° and the 90° laser lines
– Position the measuring tool in one of the
corners of the measuring surface. Switch
on the measuring tool and align it so that
the 0° laser line runs along the long side
of the measuring surface and that the 90°
laser line runs along the short side of the
measuring surface.
– Mark the crossing point of the laser lines
on the floor (Point I). Mark also the centre
of the 0° laser line at a distance of 5 m
(Point II) and at a distance of 10 m
(Point III).
10 m
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