Working Advice - Bosch GRL 250 HV Professional Manual Original

OBJ_BUCH-757-011.book Page 26 Wednesday, February 1, 2017 8:34 AM
26 | English
– After levelling, direct the laser beam in point operation on-
to the close wall A. Mark the centre point of the laser beam
on the wall (point I).
A
20 m
– Turn the measuring tool around by 180°, allow it to level in
and mark the centre point of the laser beam on the oppo-
site wall B (point II).
A
180°
– Without turning the measuring tool, position it close to wall
B. Switch the measuring tool on and allow it to level in.
– Align the height of the measuring tool (using the tripod or
by underlaying, if required) in such a manner that the cen-
tre point of the laser beam is projected exactly against the
previously marked point II on wall B.
A
1 609 92A 273 | (1.2.17)
– 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.
B
A
The difference d of both marked points I and 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.
B
For this, turn the measuring tool prior to each measuring
procedure by 90°.
The maximum permitted deviation over the measuring sec-
tion of 2 x 20 m = 40 m is as follows:
40 m x ±0.1 mm/m = ±4 mm.
The difference d between points I and III must therefore be
maximum 8 mm in each of the four measuring procedures.
If the measuring tool should exceed the maximum deviation in
any one of the four measuring procedures, have it checked at
a Bosch after-sales service agent.

Working Advice

 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 ambient light. This enhanc-
es the laser visibility for the eye.
B
 Do not use the laser viewing glasses as safety goggles.
The laser viewing glasses are used for improved visualisa-
tion 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 glasses do not afford complete
UV protection and reduce colour perception.
Working with the Laser Receiver (Accessory)
Under unfavourable light conditions (bright environment, di-
rect sunlight) and for larger distances, use the laser receiver
for improved finding of the laser beam 35.
When working with the laser receiver, select rotational opera-
tion with the highest rotational speed.
Before working with the laser receiver, read and observe the
laser receiver operating instructions.
Working with the Remote Control
While pressing the operator buttons, the measuring tool can be
brought out of alignment so that the rotation is briefly stopped.
This effect is avoided when using the remote control.
B
180°
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