Bosch GLL 2-15 Instrucciones De Funcionamiento Y Seguridad página 11

Checking the Leveling Accuracy of the
Horizontal Line
For the check, a free surface of approx.
16 x 16 ft (5 x 5 m) 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.
A
– At a distance of 8 ft (2.5 m)from the tool,
mark the center of the laser line (point I on
wall A and point II on wall B) on both walls.
A
– Set up the tool 16 ft (5 m) 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 II on wall B.
– Mark the center 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 tool from the level plane.
The maximum permitted deviation d
calculated as follows:
d = double distance of the walls x 0.0036
max
in/ft (0.3 mm/m). Example: With a 16 ft (5 m)
B
B
is
max
distance between the walls, the maximum
deviation must not exceed d
0.0036 in/ft = 0.1152 in (2 x 5 m x 0.3mm/m =
3 mm). Thus, the marks must not be more than
0.1152 in (3 mm) apart.
A
Checking the Leveling Accuracy of the
d
For this check, a door opening is required with
at least 8 ft of space (on a firm surface) to each
side of the door.
– Position the tool on a firm, level surface (not
on a tripod) 8 ft (2.5 m) 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
– Mark the center of the vertical laser line at
the floor of the door opening (point I), at a
distance of 16 ft (5 m) beyond the other side
of the door opening (point II) and at the
upper edge of the door opening (point III).
– Position the tool on the other side of the
door opening directly behind point II. Allow
the tool to level in and align the
vertical laser line in such a manner that its
center runs exactly through points I and II.
-11-
A
= 2 x 16 ft x
max
180°
Vertical Line
B
B