Bosch GLL 2 - Инструкция по эксплуатации - Страница 15

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Bosch Power Tools

1 609 92A 0KK | (7.5.14)

– Align the height of the measuring tool (using a tripod or by 

underlaying, if required) in such a manner that the cross 
point of the laser lines is projected against the previously 
marked point

II

 on the wall B.

– Without changing the height, turn around the measuring 

tool by 180 °. Direct it against the wall A in such a manner 
that the vertical laser line runs through the already marked 
point

I

. Allow the measuring tool to level in and mark the 

cross point of the laser lines on the wall A (point

III

).

– The difference 

d

 of both marked points 

I

 and 

III

 on wall A 

results in the actual height deviation of the measuring tool 
alongside the lateral axis.

On the measuring distance of 2 x 5 m = 10 m, the maximum 
allowable deviation is: 
10 m x ± 0.2 mm/m = ± 2 mm. 
Thus, the difference 

d

 between points 

I

 and 

III

 must not ex-

ceed 2 mm (max.).

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 vertical operation with 
automatic levelling, and direct the laser beam 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

).

– Rotate the measuring tool by 180 ° and position it on the 

other side of the door opening directly behind point 

II

. Al-

low 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

.

– Mark the centre of the laser line at the upper edge of the 

door opening as point 

IV

.

– The difference 

d

 of both marked points 

III

 and 

IV

 results 

in the actual deviation of the measuring tool to the plumb 
line.

– Measure the height of the door opening.

The maximum admissible deviation is calculated as follows:
Doubled height of the door opening x 0.2 mm/m
Example: For a door-opening height of 2 m, the maximum de-
viation may be
2 x 2 m x ± 0.2 mm/m = ± 0.8 mm. Consequently, points 

III

and 

IV

 may be no more than 0.8 mm (max.) apart from each 

other.

A

B

A

B

d

d

180°

2,5 m

2,5 m

2 m

d

OBJ_BUCH-907-003.book  Page 15  Wednesday, May 7, 2014  1:39 PM