22
| English
1 609 929 S02 | (17.3.09)
Bosch Power Tools
– 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 cal-
culated 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 Verti-
cal 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 on a firm, level
surface (not on a tripod) 2.5 m away from the
door opening. Allow the measuring tool to lev-
el in while in cross-line operation mode, and
direct the laser beams at the door opening.
– Mark the centre of the vertical laser line at
the floor of the door opening (point
I
), at a
distance of 5 metres beyond the other side of
the door opening (point
II
) and at the upper
edge of the door opening (point
III
).
– Position the measuring tool on the other side
of the door opening directly behind point
II
.
Allow the measuring tool to level in and align
the vertical laser line in such a manner that
its centre runs exactly throught points
I
and
II
.
– The difference
d
between point
III
and the
centre of the laser line at the upper edge of
the door opening results in the actual devia-
tion of the measuring tool from the vertical
plane.
– Measure the height of the door opening.
The maximum permitted deviation d
max
is cal-
culated as follows:
d
max
= double height of the door opening
x 0.3 mm/m
Example: With a door opening height of 2 me-
tres, the maximum permitted deviation is
d
max
= 2 x 2 m x 0.3 mm/m = 1.2 mm. Thus, the
marks must not be more than 1.2 mm apart.
2,5 m
2,5 m
2 m
d
OBJ_BUCH-817-003.book Page 22 Tuesday, March 17, 2009 8:51 AM