Bedienungsanleitung Bosch GLL 2-50 (Seite 16 von 239) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Polnisch, Türkisch, Schwedisch, Norwegisch, Finnisch)

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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:

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

max

=2x5mx0.3mm/m=3mm. 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:

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

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

2,5 m

2 m

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

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