Bosch GLL 2-50 - Инструкция по эксплуатации - Страница 16

16

 | English 

1 609 92A 0KJ | (6.5.14)

Bosch Power Tools

Checking the Levelling Accuracy of the Horizontal Line

For the check, a free surface of approx. 5 x 5 metres is required.

– Set up the measuring tool on a firm, level surface between 

both walls A and B. Allow the measuring tool to level in 
while in horizontal operation.

– At a distance of 2.5 metres from the measuring tool, mark 

the centre of the laser line (point

I

 on wall A and point

II

 on 

wall B) on both walls.

– 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

max

 is calculated as fol-

lows:
d

max

= double distance of the walls x 0.3 mm/m

Example: With a 5 metre distance between the walls, the max-
imum deviation must not exceed
d

max

= 2 x 5 m x 0.3 mm/m = 3 mm.  Thus,  the  marks  must  not 

be more than 3 mm apart.

Checking the Levelling Accuracy of the Vertical Line

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.

– Position the measuring tool on a firm, level surface (not on 

a tripod) 2.5 m away from the door opening. Allow the 
measuring tool to level in while in cross-line operation 
mode, and direct the laser beams at the door opening.

– 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.

– Measure the height of the door opening.

The maximum permitted deviation d

max

 is calculated as fol-

lows:
d

max

= double height of the door opening  x 0.3 mm/m

Example: With a door opening height of 2 metres, the maxi-
mum permitted deviation is 
d

max

= 2 x 2 m x 0.3 mm/m = 1.2 mm. Thus, the marks must 

not be more than 1.2 mm apart.

2,5 m

,0 m

5,

5

A

B

d

2,5 m

A

B

2,5 m

2,5 m

2 m

d

OBJ_BUCH-817-005.book  Page 16  Tuesday, May 6, 2014  10:15 AM