18
| English
1 609 929 K01 | (1.10.07)
Bosch Power Tools
–
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.
–
Set up the measuring tool on a firm, level sur-
face between both walls A and B. Allow the
measuring tool to level in while in horizontal
operation.
–
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.
Checking the Levelling Accuracy of the
Vertical Line
For this check, a door opening is required with
at least 2.5 metres of space (on a firm surface)
to each side of the door.
–
Position the measuring tool at a distance of
2.5 metres away from the door opening on a
firm surface (not on a tripod). Allow the
measuring tool to level in while in cross-line
operation and direct the laser beam against
the door opening.
2,5 m
,0 m
5,
5
A
B
d
2,5 m
A
B
2,5 m
2,5 m
OBJ_BUCH-186-003.book Page 18 Monday, October 1, 2007 12:30 PM
