Bedienungsanleitung Bosch GLL 3-50 Professional (Seite 16 von 245) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Polnisch, Türkisch, Schwedisch, Norwegisch, Finnisch)

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16 | English

1 609 92A 0KM | (19.11.14) Bosch Power Tools

– Turn the measuring tool by 180°, allow it to level in and

mark the cross point of the laser lines on the opposite wall

B (point II).

– 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 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

indicates the actual height deviation of the measuring tool.

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 Horizontal Line

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

quired.

– 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

follows:

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

= 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.

180˚

2,5 m

,0 m

2,5 m

OBJ_BUCH-1973-003.book Page 16 Wednesday, November 19, 2014 8:19 AM

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