Bosch GLL 3-80 - Инструкция по эксплуатации - Страница 24

24

 | English

A

B

d

180°

– Turn the measuring tool 180° without adjusting the

height. Aim it at wall A such that the vertical laser line runs
through the already marked point 

Ⅰ

. Allow the measuring

tool to level in and mark the point where the laser lines
cross on wall A (point 

Ⅲ

).

– The discrepancy 

d

 between the two marked points 

Ⅰ

 and

Ⅲ

 on wall A reveals the actual height deviation of the

measuring tool.

The maximum permitted deviation on the measuring dis-
tance of 2 × 

5

 m = 

10

 m is as follows: 

10

 m × ±

0.2

 mm/m = ±

2

 mm. The discrepancy 

d

 between

points 

Ⅰ

 and 

Ⅱ

 must therefore amount to no more than 

2

 mm.

Checking the Levelling Accuracy of the Vertical Lines

For this check, you will need a door opening (on solid
ground) which has at least 2.5 m of space either side of the
door.
– Place the measuring tool 2.5 m away from the door open-

ing on a firm, flat surface (not on a tripod). Switch on the
measuring tool in the mode with automatic levelling. Se-
lect the operating mode for generating a vertical laser
plane directly in front of the measuring tool.

2,5 m

2,5 m

– Mark the centre of the vertical laser line on the floor of the

door opening (point 

Ⅰ

), 5 m away on the other side of the

door opening (point 

Ⅱ

) and on the upper edge of the door

opening (point 

Ⅲ

).

2 m

d

– Rotate the measuring tool 180° and position it 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 way that its centre passes through
points 

Ⅰ

 and 

Ⅱ

 exactly.

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

door opening as point 

Ⅳ

.

– The discrepancy 

d

 between the two marked points 

Ⅲ

 and

Ⅳ

 reveals the actual vertical deviation of the measuring

tool.

– Measure the height of the door opening.
Repeat the measuring process for the two vertical laser
planes. To do this, select the operating mode for generating
a vertical laser plane to one side of the measuring tool and
rotate the measuring tool by 90° before beginning the meas-
uring process.
You can calculate the maximum permitted deviation as fol-
lows:
Doubled height of the door opening × 

0.2

 mm/m

Example: At a door opening height of 

2

 m, the maximum de-

viation amounts to
2 × 

2

 m × ±

0.2

 mm/m = ±

0.8

 mm. The points 

Ⅲ

 and 

Ⅳ

must therefore be no further than 

0.8

 mm from each other.

Working Advice

u

Only the centre of the laser line must be used for
marking.

 The width of the laser line changes depending

on the distance.

Working with the Laser Target Plate

The laser target plate 

(28)

 improves visibility of the laser

beam in unfavourable conditions and at greater distances.
The reflective surface of the laser target plate 

(28)

 improves

visibility of the laser line. The transparent surface enables
the laser line to be seen from behind the laser target plate.

Working with the Tripod (Accessory)

A tripod offers a stable, height-adjustable support surface
for measuring. Place the measuring tool with the 1/4" tripod
mount 

(20)

 on the thread of the tripod 

(32)

 or a conven-

tional camera tripod. Use the 5/8" tripod mount 

(19)

 to se-

cure the measuring tool on a conventional building tripod.
Tighten the measuring tool using the locking screw of the tri-
pod.

1 609 92A 7GY | (21.04.2022)

Bosch Power Tools