Bosch GLL 5-50, Original Instructions Manual

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English | 9
Bosch Power Tools 1 609 92A 0MH | (16.5.14)
– Direct the laser against the close wall A and allow the meas-
uring tool to level in. Mark the centre of the point where the
laser lines cross each other on the wall (point
I
).
– Turn the measuring tool by 180°, allow it to level in and
mark the cross point of the laser lines on the opposite wall
B (point
II
).
– Without turning the measuring tool, position it close to wall
B. Switch the measuring tool on and allow it to level in.
– Align the height of the measuring tool (using a tripod or by
underlaying, if required) in such a manner that the cross
point of the laser lines is projected against the previously
marked point
II
on the wall B.
– Without changing the height, turn around the measuring
tool by 180°. Direct it against the wall A in such a manner
that the vertical laser line runs through the already marked
point
I
. Allow the measuring tool to level in and mark the
cross point of the laser lines on the wall A (point
III
).
– The difference d of both marked points
I
and
III
on wall A
indicates the actual height deviation of the measuring tool.
The maximum permitted deviation d
max
can be calculated as
follows:
d
max
= double the distance between the walls x 0.2 mm/m
Example: If the distance between the walls is 5 m, the maxi-
mum deviation is
d
max
= 2 x 5 m x 0.2 mm/m = 2 mm. The marks must there-
fore be maximum 2 mm apart.
Checking the Levelling Accuracy of the Horizontal Line
For the check, a free surface of approx. 5 x 5 metres is re-
quired.
– Mount the measuring tool in the middle between walls A
and B on the rotating platform or a tripod, or place it on a
firm, flat surface. Switch on the measuring tool in the mode
with automatic levelling. Switch on horizontal mode and al-
low the measuring tool to level in.
– At a distance of 2.5 metres from the measuring tool, mark
the centre of the laser line (point
I
on wall A and point
II
on
wall B) on both walls.
– Set up the measuring tool 5 metres away turned by 180°
and allow it to level in.
– Align the height of the measuring tool (using a tripod or by
underlaying, if required) in such a manner that the centre
A
B
5 m
180°
A
B
B A
d
180°
A
B
2,5 m
5,0 m 5, 5,0
m
5
A
B
2,5 m
d
5,0 m
2,5 m
5,0 m
A
B
OBJ_BUCH-2195-001.book Page 9 Friday, May 16, 2014 2:18 PM