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| English
Automatic shut-off
If no button on the measuring tool is pressed for approx.
120
min, the measuring tool will automatically switch itself
off to preserve battery life.
To switch the measuring tool back on after it has been auto-
matically switched off, you can either slide the on/off
switch
(2)
to the "
OFF
" position first and then switch the
measuring tool back on, or press the laser operating mode
button
(4)
.
To deactivate the automatic shut-off function, hold down the
laser mode button
(4)
for at least 3 s (with the measuring
tool switched on). If the automatic shut-off function is deac-
tivated, the laser beams will flash briefly as confirmation.
To activate the automatic shut-off function, switch the meas-
uring tool off and on again.
Operating Modes
The measuring tool has several operating modes, which you
can switch between at any time:
– Cross-line mode (see figure
A
): Generates a horizontal
laser plane and a vertical laser line pointing forwards,
– Horizontal mode (see figure
B
): Generates a horizontal
laser plane,
– Vertical mode (see figure
C
): Generates a vertical laser
line pointing forwards.
To change the operating mode, press the button for laser op-
erating mode
(4)
as often as required until the laser beams
are generated in the required operating mode.
All operating modes can be used with both automatic level-
ling and the incline function.
Automatic Levelling
The measuring tool monitors the position at all times during
operation. It works with automatic levelling during set-up
within the self-levelling range of ±
4
°. Outside of the self-lev-
elling range, it will automatically switch to the incline func-
tion.
Working with automatic levelling (see figures A–C)
Position the measuring tool on a level, firm surface or attach
it to the holder
(10)
or the tripod
(17)
.
The automatic levelling function automatically compensates
irregularities within the self-levelling range of ±
4
°. Once the
laser beam is permanently lit, the measuring tool has levelled
in.
If automatic levelling is not possible, e.g. because the sur-
face on which the measuring tool stands deviates by more
than
4
° from the horizontal plane, the laser lines will quickly
flash for 2 seconds at first. Afterwards, the laser lines will
light up for 5 seconds and then quickly flash every 5 seconds
several times. The measuring tool is in the incline function.
For additional work with automatic levelling, set up the
measuring tool so that it is horizontal and wait for the self-
levelling procedure to complete. As soon as the measuring
tool is within the self-levelling range of ±
4
°, the laser beams
will light up continuously.
In case of ground vibrations or position changes during oper-
ation, the measuring tool is automatically levelled again.
Upon levelling, check the position of the laser beams with re-
gard to the reference points to avoid errors arising from a
change in the measuring tool's position.
Working with the Incline Function (see figure K)
Place the measuring tool on an inclined surface. When work-
ing with the incline function, the laser lines will quickly flash
for 2 seconds at first. Afterwards, the laser lines will light up
for 5 seconds and then quickly flash every 5 seconds several
times.
In the incline function, the laser lines are no longer levelled
and no longer necessarily run perpendicular to one another.
Accuracy Check of the Measuring Tool
Influences on Accuracy
The largest influence is exerted by the ambient temperature.
In particular, temperature differences that occur from the
ground upwards can refract the laser beam.
Since the temperature stratification is greatest at ground
level, you should mount the measuring tool on a tripod and
position it in the centre of the work surface, wherever this is
possible.
In addition to external influences, device-specific influences
(e.g. falls or heavy impacts) can also lead to deviations. For
this reason, check the levelling accuracy each time before
beginning work.
Should the measuring tool exceed the maximum deviation
during one of the tests, please have it repaired by a
Bosch
after-sales service.
Checking the Height Accuracy of the Horizontal Line
For this check, you will need a free measuring distance of
5
m on firm ground between two walls (designated A and B).
– Mount the measuring tool close to wall A on a tripod, or
place it on a firm, level surface. Switch on the measuring
tool and select cross-line operation.
A
B
5 m
– Aim the laser at the closer wall A and allow the measuring
tool to level in. Mark the middle of the point at which the
laser lines cross on the wall (point I).
1 609 92A 607 | (14.01.2021)
Bosch Power Tools
