Bosch Professional GPL 3 G Original Instructions Manual page 23

Switching On/Off
To switch on the measuring tool, slide the on/off switch (2) to the ON position. As soon
as it is switched on, the measuring tool emits laser beams from the outlet apertures (1).
Do not direct the laser beam at persons or animals and do not stare into the laser
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beam yourself (even from a distance).
To switch off the measuring tool, slide the on/off switch (2) to the OFF position. The
pendulum unit is locked when the tool is switched off.
Never leave the measuring tool unattended when switched on, and ensure the
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measuring tool is switched off after use. Others may be blinded by the laser beam.
If the maximum permitted operating temperature of 45 °C is exceeded, the tool shuts
down to protect the laser diode. Once it has cooled down, the measuring tool is opera-
tional again and can be switched back on.
Automatic shut-off
The measuring tool automatically switches itself off after 60 min of operation.
If the switched on measuring tool is not within the self-levelling range (the laser points
flash continuously), the automatic shut-off is reset to 60 min.
Automatic Levelling
Position the measuring tool on a level, firm support or attach it to a tripod (11).
To use the bottom laser point, rotate the measuring tool on the magnetic rotating
mount (3) in such a manner that the laser point can be seen on the floor.
After switching on, the automatic levelling function automatically compensates irregular-
ities within the self-levelling range of ±4°. The levelling is finished as soon as the laser
points light up continuously (i.e. no longer flashing) and do not move any more.
If automatic levelling is not possible, e.g. because the surface on which the measuring
tool stands deviates by more than 4° from the horizontal plane, the laser points will flash
continuously and quickly.
If this is the case, set up the measuring tool in a level position and wait for the self-level-
ling to take place. As soon as the measuring tool is within the self-levelling range of ±4°,
the laser points will light up continuously.
In case of ground vibrations or position changes during operation, the measuring tool is
automatically levelled again. After each levelling process, check the position of the hori-
zontal and/or vertical laser points in relation to the reference points to avoid errors
arising from a change in the measuring tool's position.
Bosch Power Tools
English | 23
1 609 92A 5MH | (22.10.2020)