Working Advice - Bosch GRL Professional 250 HV Originalbetriebsanleitung

OBJ_BUCH-757-006.book Page 31 Wednesday, September 29, 2010 11:21 AM
A
20 m
– After levelling, direct the laser beam in point
operation onto the close wall A. Mark the
centre point of the laser beam on the wall
(point I).
A
180°
– Turn the measuring tool around by 180°, al-
low it to level in and mark the centre point of
the laser beam on the opposite wall B (point
II).
– Without turning the measuring tool, position
it close to wall B. Switch the measuring tool
on and allow it to level in.
A
– Align the height of the measuring tool (using
the tripod or by underlaying, if required) in
such a manner that the centre point of the la-
ser beam is projected exactly against the pre-
viously marked point II on wall B.
Bosch Power Tools
B A
– Rotate the measuring tool by 180° without
changing the height. Allow it to level in and
mark the centre point of the laser beam on
wall A (point III). Take care that point III is as
vertical as possible above or below point I.
– The difference d of both marked points I and
B III on wall A amounts to the actual deviation
of the measuring tool for the measured axis.
Repeat the measuring procedure for the other
three axes. For this, turn the measuring tool
prior to each measuring procedure by 90°.
On the measuring section of 2 x 20 m = 40 m,
the maximum allowable deviation is:
40 m x ±0.1 mm/m = ±4 mm.
Consequently, the difference d between points
I and III for each of the four individual measure-
ments may not exceed 4 mm max.
If the measuring tool should exceed the maxi-
mum deviation in anyone of the four measuring
procedures, have it checked at a Bosch after-
sales service agent.

Working Advice

B
Always use the centre of the laser point for
marking. The size of the laser point changes
with the distance.
Laser Viewing Glasses (Accessory)
The laser viewing glasses filter out the ambient
light. This makes the red light of the laser ap-
pear brighter for the eyes.
Do not use the laser viewing glasses as safe-
ty goggles. The laser viewing glasses are used
for improved visualisation of the laser beam,
but they do not protect against laser radiation.
Do not use the laser viewing glasses as sun
glasses or in traffic. The laser viewing glass-
es do not afford complete UV protection and
reduce colour perception.
English | 31
B
180°
2 610 A14 633 | (29.9.10)