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Bosch GLL100-40G Instrucciones De Funcionamiento Y Seguridad página 12

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Influences on Accuracy
The ambient temperature has the greatest
influence. Especially temperature differences
occurring from the ground upward can refract
the laser beam.
Since the largest difference in temperature
layers is close to the ground, you should
mount the measuring tool on a tripod and
position it in the center of the work surface,
wherever this is possible.
In addition to external influences, device-spe-
cific influences (e.g. falls or heavy impacts)
can also lead to deviations. For this reason,
check the leveling accuracy each time before
beginning work.
First check the height accuracy and leveling
accuracy of the horizontal laser line, then the
leveling accuracy of the vertical laser line.
Should the measuring tool exceed the maxi-
mum 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 measur-
ing distance of 16 ft (5 m) on firm ground be-
tween 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.
A
– Aim the laser at the closer wall A and al-
low the measuring tool to level in. Mark the
middle of the point at which the laser lines
cross on the wall (point I).
Leveling Accuracy
16 ft (5 m)
A
– 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 II).
– Position the measuring tool – without ro-
tating it – close to wall B, switch it on and
allow it to level in.
A
– Align the height of the measuring tool (us-
ing the tripod or by placing objects under-
neath as required) so that the point where
the laser lines cross exactly hits the previ-
ously marked point II on wall B.
A
B
d
– Turn the measuring tool 180° without ad-
justing the height. Aim it at wall A such that
the vertical laser line runs through the al-
ready marked point I. Allow the measuring
tool to level in and mark the point where
the laser lines cross on wall A (point III).
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180°
B
B
B
180°

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