Bosch GRL Professional 250 HV Original Instructions Manual page 12

OBJ_BUCH-1492-001.book Page 12 Friday, July 1, 2011 12:25 PM
12 | English
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
-1
(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 19 on the remote con-
trol. Rotational operation starts with average rotational speed.
To change the rotational speed, press the rotational operation
button 5 or button 19 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 32.
Line Operation, Point Operation
(10°/25°/50°, 0°)
To switch to line or point operation, press the line operation
button 11 or button 20 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 button
11 or button 20 on the remote control. The aperture angle is
increased in two steps; at the same time, the rotational speed
is increased with each step. When pressing the line operation
button a third time, the measuring tool switches to point op-
eration after brief post-pulsation. Pressing the line operation
button again takes you back to line operation with the small-
est aperture angle.
Note: Due to inertia, it is possible for the laser to slightly move
beyond the end point of the laser line.
1 619 929 J23 | (1.7.11)
Rotating the Laser Line/Laser Dot or the
Rotational Plane (see figure A)
When the measuring tool is in the horizontal position, the
laser line (in line operation) or the laser dot (in point opera-
tion) can be positioned within the rotational plane of the
laser. Rotation is possible by 360°.
For this, manually turn the rotation head 10 to the desired
position or use the remote control: Press button 22 to rotate
in clockwise direction, and button 23 on the remote control to
rotate in anticlockwise direction. In rotational operation,
pressing the buttons has no effect.
When the measuring tool is in the vertical position, it is pos-
sible to rotate the laser point, laser line or rotational plane
around the vertical axis. Rotating is possible only within the
self-levelling range (5° leftwards or rightwards) and only with
the remote control.
Press button 22 on the remote control to rotate in clockwise
direction, and button 23 on the remote control to rotate in an-
ticlockwise direction.
Automatic Levelling of the Rotational Laser Level
Overview
After switching on, the measuring tool automatically detects
the horizontal or vertical position. To change between the
horizontal and vertical position, switch the measuring tool off,
reposition it and switch on again.
After switching on, the measuring tool checks the horizontal
and vertical position and automatically levels out any uneven-
ness within the self-levelling range of approx. 8 % (5°).
When the measuring tool is inclined by more than 8 % after
switching on or after a position change, levelling in is no long-
er possible. In this case, the rotor is stopped, the laser flashes
and levelling indicator 3 continuously lights up red. Reposi-
tion the measuring tool and wait for it to re-level. Without re-
positioning, the laser is automatically switched off after
2 minutes and the measuring tool after 2 hours.
When the measuring tool is levelled in, it continuously checks
the horizontal and vertical position. Automatic re-levelling
takes place after position changes. To avoid faulty measure-
ments, the rotor stops during the levelling process, the laser
flashes and the levelling indicator 3 flashes green.
Shock-warning Function
The measuring tool has a shock-warning function; after posi-
tion changes or shock to the measuring tool, or in case of
ground vibrations, it keeps the measuring tool from levelling
in at changed heights, and thus prevents vertical errors.
To switch on the shock-warning function, press the shock-
warning button 2. The shock-warning indicator 1 continuous-
ly lights up green, and the shock-warning function is activated
after 30 seconds.
When the levelling-accuracy range is exceeded after a posi-
tion change of the measuring tool or when heavy ground vi-
brations are detected, the shock-warning function is actuat-
ed: The rotation is stopped, the laser flashes, the levelling
indicator 3 goes out and the shock-warning indicator 1 flash-
es red. The current operating mode is stored.
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