Bosch GLL 5-50 X Professional Original Instructions Manual page 10

OBJ_BUCH-2753-001.book Page 10 Wednesday, November 4, 2015 4:09 PM
10 | English
A
B
– Set up the measuring tool 5 metres away turned by 180°
and allow it to level in.
– Align the height of the measuring tool (using a tripod or by
underlaying, if required) in such a manner that the centre
of the laser line is projected exactly against the previously
marked point II on wall B.
– Mark the centre 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 measuring tool from
the level plane.
The maximum permitted deviation d
follows:
d = double the distance between the walls x 0.2 mm/m
max
Example: If the distance between the walls is 5 m, the maxi-
mum deviation is
d = 2 x 5 m x 0.2 mm/m = 2 mm. The marks must there-
max
fore be maximum 2 mm apart.
Checking the Levelling Accuracy of the Vertical Lines
For this check, a door opening is required with at least 2.5 m
of space (on a firm surface) to each side of the door.
– Place the measuring tool 2.5 m away from the door open-
ing on a firm, flat surface (not on the rotating platform or a
tripod). Switch on the measuring tool in the mode with au-
tomatic levelling. Switch on vertical mode with all vertical
laser lines and aim the front vertical laser line at the door
opening. Allow the measuring tool to level in.
1 609 92A 1SA | (4.11.15)
– Mark the centre of the vertical laser line at the floor of the
door opening (point I), at a distance of 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 measuring tool on the other side of the door
opening directly behind point II. Allow the measuring tool
to level in and align the vertical laser line in such a manner
that its centre runs exactly through points I and II.
– The difference d between point III and the centre of the la-
ser line at the upper edge of the door opening results in the
actual deviation of the measuring tool from the vertical
plane.
can be calculated as
– Measure the height of the door opening.
max
The maximum permitted deviation d
follows:
d
max
Example: If the height of the door opening is 2 m, the maxi-
mum deviation is
d
max
fore be maximum 0.8 mm apart.
Working Advice
 For marking, always use only the centre of the laser
point or the laser line. The size of the laser point as well as
the width of the laser line change with distance.
Laser Viewing Glasses (Accessory)
The laser viewing glasses filter out the ambient light. This
makes the red light of the laser appear brighter for the eyes.
 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.
max
= double the height of the door opening x 0.2 mm/m
= 2 x 2 m x 0.2 mm/m = 0.8 mm. The marks must there-
can be calculated as
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