18
| English
1 609 929 W91 | (20.5.10)
Bosch Power Tools
– 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 devi-
ation of the measuring tool.
The maximum permitted deviation d
max
is calcu-
lated as follows:
d
max
= double distance of the walls x 0.3 mm/m
Example: With a 5 metre distance between the
walls, the maximum deviation must not exceed
d
max
= 2 x 5 m x 0.3 mm/m = 3 mm. Thus, the
marks must not 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 me-
tres is required.
– Mount the measuring tool between both
walls A and B onto the holder or a tripod, or
place it on a firm and level surface. Allow the
measuring tool to level in.
– At a distance of 2.5 metres from the measur-
ing 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 of the laser
line is projected exactly against the previous-
ly marked point
II
on wall B.
– Mark the centre of the laser line as point
III
(vertically above or below point
I
) on the wall
A.
– The difference
d
of both marked points
I
and
III
on wall A indicates the actual deviation of
the measuring tool from the level plane.
The maximum permitted deviation d
max
is calcu-
lated as follows:
d
max
= double distance of the walls x 0.3 mm/m
Example: With a 5 metre distance between the
walls, the maximum deviation must not exceed
d
max
= 2 x 5 m x 0.3 mm/m = 3 mm. Thus, the
marks must not be more than 3 mm apart.
d
180°
A
B
2,5 m
5,0 m
A
B
2,5 m
d
5,0 m
2,5 m
2,5 m
5,0 m
0 m
A
B
OBJ_BUCH-1236-001.book Page 18 Thursday, May 20, 2010 12:18 PM