Bedienungsanleitung Bosch GCL 2-50 G (Seite 18 von 266) (Alle Sprachen)

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18 | English

The automatic levelling function automatically compensates

irregularities within the self-levelling range of ±4°. Once the

laser beam is permanently lit, the measuring tool has levelled

in.

If automatic levelling is not possible, e.g. because the sur-

face on which the measuring tool stands deviates by more

than 4° from the horizontal plane, the laser lines will initially

flash quickly for 2seconds, then quickly flash every

5seconds several times. The measuring tool is in the incline

function.

For additional work with automatic levelling, set up the

measuring tool so that it is horizontal and wait for the self-

levelling procedure to complete. As soon as the measuring

tool is within the self-levelling range of ±4°, the laser beams

will light up continuously.

In case of ground vibrations or position changes during oper-

ation, the measuring tool is automatically levelled again.

Upon levelling, check the position of the laser beams with re-

gard to the reference points to avoid errors arising from a

change in the measuring tool's position.

Working with the Incline Function (seefigureE)

Place the measuring tool on an inclined surface. When work-

ing with the incline function, the laser lines will initially flash

quickly for 2seconds, then quickly flash every 5seconds

several times.

In the incline function, the laser lines are no longer levelled

and no longer necessarily run perpendicular to one another.

Accuracy Check of the Measuring Tool

Influences on Accuracy

The largest influence is exerted by the ambient temperature.

In particular, temperature differences that occur from the

ground upwards can refract the laser beam.

Since the temperature stratification is greatest at ground

level, you should always mount the measuring tool on a tri-

pod for measuring distances of 20m or more. In addition,

position the measuring tool in the centre of the work surface,

wherever this is possible.

In addition to external influences, device-specific influences

(e.g. falls or heavy impacts) can also lead to deviations. For

this reason, check the levelling accuracy each time before

beginning work.

First check the height accuracy and levelling accuracy of the

horizontal laser line, then the levelling accuracy of the ver-

tical laser line.

Should the measuring tool exceed the maximum deviation

during one of the tests, please have it repaired by a Bosch

after-sales service.

Checking the Height Accuracy of the Horizontal Line

For this check, you will need a free measuring distance of

5m on firm ground between two walls (designated A andB).

– Mount the measuring tool close to wallA on a tripod, or

place it on a firm, level surface. Switch on the measuring

tool and select cross-line operation.

5 m

– Aim the laser at the closer wall A and allow the measuring

tool to level in. Mark the middle of the point at which the

laser lines cross on the wall (pointI).

180°

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

the point where the laser lines cross on the opposite wall

B (point).

– Position the measuring tool –without rotating it– close to

wallB, switch it on and allow it to level in.

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

by placing objects underneath as required) so that the

point where the laser lines cross exactly hits the previ-

ously marked point on wallB.

180°

1 609 92A 7LT | (28.04.2022) Bosch Power Tools

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