Bosch GRL Professional 250 HV Originalbetriebsanleitung Seite 24

24 | English
Switching On and Off
 Do not direct the laser beam at persons or animals (es-
pecially not at their eye level), and do not stare into the
laser beam yourself (not even from a distance). Imme-
diately after switching on, the measuring tool sends out the
vertical plumb beam 9 and the variable laser beam 6.
– For switching on the measuring tool, press the On/Off
button 4. The indicators 1, 3 and 12 light up briefly. The
measuring tool immediately starts the automatic levelling.
During the levelling, the levelling indicator 3 lights up
green and the laser flashes in point operation.
The measuring tool is levelled in as soon as levelling indicator
3 lights up green continuously and the laser beam is steady.
After the levelling is completed, the measuring tool automati-
cally starts in rotational operation.
With the operating mode buttons 5 and 11, the operating
modes can already be specified during levelling in (see "Oper-
ating Modes of the Rotational Laser Level", page 24). In this
case, the measuring tool starts in the set operating mode up-
on completion of levelling in.
– To switch off the measuring tool, press the On/Off button
4 again.
 Do not leave the switched-on measuring tool unattend-
ed and switch the measuring tool off after use. Other
persons could be blinded by the laser beam.
To save the batteries, the measuring tool is automatically
switched off when not within the self-levelling range for more
than 2 h or when the shock warning is actuated for more than
2 h (see "Automatic Levelling of the Rotational Laser Level",
page 25). Reposition the measuring tool and switch it on
again.
Starting Operation of the Remote Control
 Protect the remote control against moisture and direct
sunlight.
 Do not subject the remote control to extreme tempera-
tures or variations in temperature. As an example, do
not leave it in vehicles for longer periods. In case of large
variations in temperature, allow the remote control to ad-
just to the ambient temperature before putting it into oper-
ation.
The remote control remains ready for operation as long as a
battery with sufficient voltage is inserted.
– Set up the measuring tool in such a manner that the signals
of the remote control can directly reach one of the recep-
tion lenses 7. When the remote control cannot be pointed
directly against a reception lens, the working range is re-
duced. By reflecting the signal (e.g. against walls), the
working range can be improved, even for indirect signals.
After pressing a button on the remote control, the illuminated
operation indicator 30 indicates that a signal was sent out.
Switching the measuring tool on/off with the remote control is
not possible.
1 609 92A 0D9 | (24.3.14)
Operating Modes of the Rotational Laser Level
Overview
All three operating modes are possible with the measuring
tool in horizontal and vertical position.
Rotational Operation
Rotational operation is especially recom-
mended when using the laser receiver.
You can select between different rota-
tional speeds.
Line Operation
In this operation mode, the variable laser
beam moves within a limited aperture an-
gle. This increases the visibility of the la-
ser beam in comparison to rotational op-
eration. You can select between different
aperture angles.
Point Operation
This operation mode enables the best vis-
ibility of the variable laser beam. As an ex-
ample, it is used for easy projecting of
heights or checking building lines.
Rotational Operation (150/300/600 min
Each time after switching on, the measuring tool is in rotation-
al operation mode with average rotational speed.
– To switch from line operation to rotational operation, press
the rotational operation button 5 or button 25 on the re-
mote control. Rotational operation starts with average ro-
tational speed.
– To change the rotational speed, press the rotational oper-
ation button 5 or button 25 again until the requested
speed is reached.
When working with the laser receiver, the highest rotational
speed should be set. When working without laser receiver, re-
duce the rotational speed for improved visibility of the laser
beam and use the laser viewing glasses 38.
Line Operation, Point Operation
(10°/25°/50°, 0°)
– To switch to line or point operation, press the line opera-
tion button 11 or button 26 on the remote control. The
measuring tool switches to line operation with the smallest
aperture angle.
– To change the aperture angle, press the line operation but-
ton 11 or button 26 on the remote control. The aperture
angle is increased in two steps; at the same time, the rota-
tional speed is increased with each step. When pressing
the line operation button a third time, the measuring tool
switches to point operation after brief post-pulsation.
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