Manual Bosch GPL 3 (page 12 of 178) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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12 | English

1 609 92A 0KW | (16.5.14) Bosch Power Tools

Checking the Vertical Levelling Accuracy

For this check, a free measuring distance of approx. 5 m be-

tween floor and ceiling on a firm surface is required.

– Draw a straight line on the ceiling.

– Mount the measuring tool to the holder or a tripod. Switch

the measuring tool on and rotate it in such a manner that

the bottom plumb beam can be seen on the floor.

– Position the measuring tool in such a manner that the up-

per plumb beam points against the line on the ceiling. Al-

low the measuring tool to level in. Mark the centre of the

upper laser point on the line on the ceiling (point I). Also,

mark the centre of the laser point on the floor (point II).

– Rotate the measuring tool by 180°. Position it in such a

manner that the centre of the bottom laser point is direct-

ed on the already marked point II and the upper laser point

is directed against the line on the ceiling. Allow the meas-

uring tool to level in. Mark the centre of the upper laser

point on the line on the ceiling (point III).

– The difference d of both marked points I and III on the ceil-

ing results in the actual deviation of the measuring tool to

the plumb line.

On the measuring distance of 2 x 5 m = 10 m, the maximum

allowable deviation is:

10 m x ±0,3 mm/m = ±3 mm.

Thus, the difference d between points I and III must not ex-

ceed 3 mm (max.).

Working Advice

 Always use the centre of the laser point for marking.

The size of the laser point changes with the distance.

Attaching with the Holder

To fasten the measuring tool on the holder 8, screw the lock-

ing screw 9 of the holder into the 1/4" tripod mount 6 on the

measuring tool and tighten. To rotate the measuring tool on

the holder, slightly loosen the screw 9.

– Rotate the measuring tool on the holder 8 sideward or to-

ward the rear to make the bottom plumb beam visible.

– Rotate the measuring tool on the holder 8 to project

heights with the horizontal laser beam.

With the holder 8, the measuring tool can be attached as

follows:

– Mount the holder 8 to the tripod 18 or a commercially

available camera tripod via the 1/4" tripod mount 13. For

fastening to a commercially available construction tripod,

use the 5/8" tripod mount 14.

– The holder 8 can be fastened to steel parts via the magnets

12.

– The holder 8 can be fastened to drywalls or wood walls

with screws. For this, insert screws with a minimum length

of 60 mm into the screw holes 10 of the holder.

– The holder 8 can also be fastened to pipes or similar beams

using a commercially available strap by threading it

through the opening 11 for strap attachment.

Working with the Tripod (Accessory)

A tripod 18 offers a stable, height-adjustable measuring sup-

port. Place the measuring tool via the tripod mount 6 onto the

1/4" male thread of the tripod and screw the locking screw of

the tripod tight.

Working with the Measuring Plate (Accessory)

With the measuring plate 15, it is possible to project the laser

mark onto the floor or the laser height onto a wall.

With the zero field and the scale, the offset or drop to the re-

quired height can be measured and projected at another loca-

tion. This eliminates the necessity of precisely adjusting the

measuring tool to the height to be projected.

The measuring plate 15 has a reflective coating that enhances

the visibility of the laser beam at greater distances or in

intense sunlight. The brightness intensification can be seen

only when viewing, parallel to the laser beam, onto the mea-

suring plate.

Laser Viewing Glasses (Accessory)

The laser viewing glasses filter out the ambient light. This

makes the red light of the laser appear brighter for the eyes.

 Do not use the laser viewing glasses as safety goggles.

The laser viewing glasses are used for improved visualisa-

tion of the laser beam, but they do not protect against laser

radiation.

 Do not use the laser viewing glasses as sun glasses or in

traffic. The laser viewing glasses do not afford complete

UV protection and reduce colour perception.

5 m

OBJ_BUCH-807-004.book Page 12 Friday, May 16, 2014 7:51 AM

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Bosch GPL 3 Manual

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