Bosch GLL2-40 - Page 9

Checking the
Leveling
Accuracy
of the
Horizontal
Line
For
the check,
a free
surface
of approx.
26x26
ft is required.
-
Set up the
tool
on a firm, level
surface
between
both walls
A and B
onto the
magnetic
bracket
or a tripod.
Allow the
tool
to level in.
dmax
=
double distance
of the
walls x
0.3
mm/m
Example:
With a 26 ft
distance
between
the
walls, the
maximum
deviation
must not
exceed dmax
=
2
x 26 m x
0.0036 in/ft
=
g/t0
in. Thus,
the marks
must not
be more
than
3/16 in
apart.
Checking the
Leveling Accuracy
of the
Vertical
Line
For
this
check, a door
opening is required
with
at
least
13 ft
of space
(on
a
firm
surlace)
to
each
side of the door.
-
Position the tool
on a firm, level
surface
(not
on a tripod) 13 ft
away from
the
door
opening. Allow the tool
to level in while
in
cross-line
operation mode,
and direct the
laser
beams at the
door opening.
II
II
-
At a distance
of 13 ft from the
tool, mark the
center
of the laser line
(point
I on wall
A and
point
ll on wall B)
on both walls.
A
r
I,
,*
ry
'.'tfrit-
-
.,'..:
B
-
[\4ark the center
of
the vertical
laser line
at
the floor of the door
opening
(point
l), at a
distance of 26 ft
beyond the other
side of
the door opening
(point
ll)
and at the
upper
edge of the door opening
(point
lll).
-
Set up the tool
26 ft away turned
by 180'
and allow it to level in.
-
Align the height
of the tool
(using
a tripod or
by
underlaying, if required)
in such a
manner
that the center
of the laser line is
projected
exactly
against the
previously
marked
point
ll
on wall B.
-
lvlark
the center
of
the laser
line
as
point
lll
(vertically
above or below
point
l) on the
wall A.
-
The
difference d
of both marked
points
I
and lll on wall
A indicates the
actual
deviation
of the tool from
the level
plane.
The
maximum
permitted
deviation dmax is
calculated
as follows:
-
Position
the tool on the
other side of the
door opening directly behind
point
ll. Allow
the tool to level in
and align the vertical
-:,@
t-'
T
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-9-
A
B
l
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