Initial Operation - Bosch GLL 2-15 Professional Originalbetriebsanleitung

Operation

Initial Operation

 Protect the measuring tool against moisture and direct
sun light.
 Do not subject the measuring tool to extreme tempera-
tures or variations in temperature. As an example, do
not leave it in vehicles for a long time. In case of large vari-
ations in temperature, allow the measuring tool to adjust to
the ambient temperature before putting it into operation.
In case of extreme temperatures or variations in tempera-
ture, the accuracy of the measuring tool can be impaired.
 Avoid heavy impact or falling of the measuring tool. Af-
ter heavy exterior impact on the measuring tool, an accura-
cy check should always be carried out before continuing to
work (see "Levelling Accuracy").
 Switch the measuring tool off during transport. When
switching off, the levelling unit, which can be damaged in
case of intense movement, is locked.
Switching On and Off
To switch on the measuring tool, push the On/Off switch 3 to
the "On" position. Immediately after switching on, the meas-
uring tool sends two laser beams out of the exit opening 1.
 Do not point the laser beam at persons or animals and
do not look into the laser beam yourself, not even from
a large distance.
To switch off the measuring tool, slide the On/Off switch 3 to
the "Off" position. When switching off, the levelling unit is
locked.
Deactivating the Automatic Shut-off
The measuring tool switches off automatically after an operat-
ing duration of 120 minutes. To deactivate the automatic
switch-off, keep the operating mode button 4 pressed for 3 s
while switching on the measuring tool. When the automatic
switch-off is deactivated, the laser lines briefly flash after 3 s.
 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 activate the automatic shut-off, switch the measuring tool
off and then on again (without the operating mode button 4
pushed).
Operation Modes (see figures A –C)
The measuring tool has four operating modes between which
you can switch at any time:
– Horizontal operation "–" (with automatic levelling):
Produces a horizontal laser line,
– Vertical operation "l" (with automatic levelling):
Produces a vertical laser line,
– Cross-line operation "+" (with automatic levelling):
Produces a horizontal and vertical laser line,
– Cross-line operation "+" (without automatic levelling):
Produces a horizontal and vertical laser line.
Bosch Power Tools
Once the measuring tool has been switched on, it is in cross-
line operation with automatic levelling. To change the operat-
ing mode, press the operating mode button 4.
If the automatic levelling indicator 5 lights up, the measuring
tool is in the operating mode without automatic levelling. In
this operating mode the respective laser lines are permanent-
ly displayed, regardless of the inclination of the measuring
tool.
Working with Automatic Levelling
Position the measuring tool on a level and firm support, attach
it to the holder 10 or to the tripod 18.
After switching on, the levelling function automatically com-
pensates irregularities within the self-levelling range of ±4°.
The levelling is finished as soon as the laser beams do not
move any more.
If the automatic levelling function is not possible, e.g. be-
cause the surface on which the measuring tool stands devi-
ates by more than 4° from the horizontal plane, the laser
beams flash slowly. In this case, bring the measuring tool to
the level position and wait for the self-levelling to take place.
As soon as the measuring tool is within the self-levelling range
of ±4°, the laser lines light up continuously again.
In case of ground vibrations or position changes during opera-
tion, the measuring tool is automatically levelled in again. To
avoid errors, check the position of the horizontal and vertical la-
ser line with regard to the reference points upon re-levelling.
Levelling Accuracy
Influences on Accuracy
The ambient temperature has the greatest influence. Espe-
cially temperature differences occurring from the ground
upward can divert the laser beam.
As thermal fluctuation is largest close to the ground, the
measuring tool, if possible, should be mounted on a commer-
cially available tripod and placed in the centre of the working
area.
Apart from exterior influences, device-specific influences
(such as heavy impact or falling down) can lead to deviations.
Therefore, check the accuracy of the measuring tool each
time before starting your work.
First, check both the height as well as the levelling accuracy of
the horizontal laser line, then the levelling accuracy of the ver-
tical laser line.
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, a free measuring distance of 5 m on a firm
surface between two walls A and B is required.
– Mount the measuring tool onto the holder or a tripod, or
place it on a firm and level surface close to wall A. Switch
the measuring tool on.
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