Bosch GLL 30 Instrucciones De Funcionamiento página 13

Do not leave the switched on measuring tool unattended and
switch the tool off after use. Other persons could be blinded by the
laser beam.
Application
The measuring tool is used for determining and checking horizontal
and vertical lines.
Automatic Leveling
Working with Automatic Leveling
Position the tool on a level and firm base or to a tripod 12.
After switching on, the leveling function automatically compensates
irregularities within the self-leveling range of ±4º. The leveling is
finished as soon as the laser beams no longer move.
If the measuring tool surface deviates more than 4º from the horizontal
plane, then the automatic leveling function is not possible and the laser
beams will flash. The lines will flash 1 s off 3 s on continually.
In this case, bring the tool to the level position and wait for the self-
leveling to take place. As soon as the tool is within the self-leveling
range of ±4°, then the laser lines will continuously light up.
In case of ground vibrations or position changes during operation, the
tool is automatically level again. To avoid errors, check the position of
the horizontal and vertical laser line with regard to the reference points
upon re-leveling.
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