Bosch GLL 2-15 Professional Originalbetriebsanleitung Seite 14

OBJ_BUCH-2049-001.book Page 14 Thursday, September 5, 2013 9:03 PM
14 | English
Checking the Height Accuracy of the Horizontal Line
For this check, a free measuring distance of 5 m on a firm sur-
face 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.
A
5 m
– 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).
A
180°
– 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.
A
– 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.
1 618 C00 94T | (5.9.13)
A
d
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
follows:
d = double distance of the walls x 0.3 mm/m
max
Example: With a 5 metre distance between the walls, the
B
maximum deviation must not exceed
d = 2 x 5 m x 0.3 mm/m = 3 mm. Thus, the marks must not
max
be more than 3 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 between both walls A and B onto
the holder or a tripod, or place it on a firm and level sur-
face. Allow the measuring tool to level in.
A
B
– 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.
B
180°
is calculated as
max
B
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