Bosch GPL 5 Professional Notice Originale page 12

12 | English
– Turn the measuring tool 180° without adjusting the
height. Allow it to level in, then mark the centre point of
the laser beam on wall A (point Ⅲ). Ensure that point Ⅲ is
as vertical as possible above or below point Ⅰ.
– The discrepancy d between the two marked points Ⅰ and
Ⅲ on wall A reveals the actual height deviation of the
measuring tool along the longitudinal axis.
The maximum permitted deviation on the measuring dis-
tance of 2 × 20 m = 40 m is as follows:
40 m × ±0.3 mm/m = ±12 mm. The discrepancy d between
points Ⅰ and Ⅲ must therefore amount to no more than
12 mm.
Checking the Horizontal Levelling Accuracy of the
Transverse Axis
For this check, you will need a free measuring distance of
20 m on firm ground in front of a wall.
– Mount the measuring tool 20 m from the wall on the
holder or a tripod, or place it on a firm, level surface.
Switch on the measuring tool.
2 0
m
– Aim one of the two side laser beams that run along the
transverse axis of the measuring tool at the wall. Allow the
measuring tool to level in. Mark the centre of the laser
point on the wall (point Ⅰ).
d
– Turn the measuring tool 180° without adjusting the
height. Allow it to level in, then mark the centre point of
the other side laser beam on the wall (point Ⅱ). Ensure
that point Ⅱ is as vertical as possible above or below
point Ⅰ.
1 609 92A 4HT | (29.01.2019)
– The discrepancy d between the two marked points Ⅰ
and Ⅱ on the wall reveals the actual height deviation of the
measuring tool along the transverse axis.
The maximum permitted deviation on the measuring dis-
tance of 2 × 20 m = 40 m is as follows:
40 m × ±0.3 mm/m = ±12 mm. The discrepancy d between
points Ⅰ and Ⅱ must therefore amount to no more than
12 mm.
Practical Advice
Always use the centre of the laser point for marking.
u
The size of the laser point changes with the distance.
Working with the measuring plate (accessory)
The measuring plate (15) can be used to project the laser
mark onto the ground and/or the laser height onto a wall.
The offset to the desired height can be measured using the
zero field and the scale, and can be projected at another
point. This means that you do not need to precisely adjust
the measuring tool for the height you want to project.
The measuring plate (15) has a reflective coating that en-
hances the visibility of the laser beam at greater distances
and in intense sunlight. The brightness intensification can
only be seen if you view the measuring plate with your line of
sight parallel to the laser beam.
Working with the Tripod (Accessory)
A tripod offers a stable, height-adjustable support surface
for measuring. Place the measuring tool with the 1/4" tripod
mount (6) on the thread of the tripod (16) or a conventional
camera tripod. Tighten the measuring tool using the locking
screw of the tripod.
Roughly align the tripod before switching on the measuring
tool.
Attaching using the holder
To attach the measuring tool to the holder (8), tighten the
locking screw (9) of the holder in the 1/4" tripod mount (6)
so that it is fixed to the measuring tool. Roughly align the
holder before switching on the measuring tool.
To turn the measuring tool on the holder (8), loosen the
locking screw (9) slightly.
– Rotate the measuring tool on the holder (8) sideways or
towards the rear to make the bottom plumb beam visible.
180°
– Rotate the measuring tool on the holder (8) to project
heights with the horizontal laser beam.
With the holder (8), the measuring tool can be attached as
follows:
– Mount the holder (8) to the tripod (16) or a commercially
available camera tripod via the 1/4" tripod mount (14).
Use the 5/8" tripod mount (13) to secure the measuring
tool on a commercially available building tripod.
– The holder (8) can be attached to steel parts using the
magnets (11).
– The holder (8) can be attached to dry construction walls
or wooden walls using screws. To do this, insert screws of
a length of at least 60 mm through the screw holes (10)
of the holder.
Bosch Power Tools