Inserting/Replacing The Batteries; Initial Operation - Bosch GLL 2-15 Professional Manual Original

OBJ_BUCH-2049-003.book Page 13 Wednesday, January 27, 2016 12:50 PM
Assembly

Inserting/Replacing the Batteries

Alkali-manganese batteries are recommended for the meas-
uring tool.
To open the battery lid 9, press the latch of the battery lid 8 in
the direction of the arrow and remove the battery lid. Insert
the supplied batteries. When inserting, pay attention to the
correct polarity according to the representation on the inside
of the battery compartment.
When the batteries become weak, the laser beams flash rap-
idly for about 5 s (while the measuring tool is switched on).
Always replace all batteries at the same time. Only use batter-
ies from one brand and with the identical capacity.
 Remove the batteries from the measuring tool when
not using it for extended periods. When storing for ex-
tended periods, the batteries can corrode and self-dis-
charge.
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.
Bosch Power Tools
 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.
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 up-
ward can divert the laser beam.
As thermal fluctuation is largest close to the ground, the meas-
uring tool, if possible, should be mounted on a commercially
available tripod and placed in the centre of the working area.
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 be-
ginning work.
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1 609 92A 25H | (27.1.16)