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46 | English
First check the levelling accuracy of the horizontal laser line, then the levelling accuracy
of the vertical laser lines.
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 Horizontal Levelling Accuracy of the Transverse Axis
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, flat surface.
Switch on the measuring tool. Switch on the horizontal laser line and the vertical laser
line at the front of the measuring tool.
A
5 m
A
180°
– Position the measuring tool – without rotating it – close to wall B, switch it on and al-
low it to level in.
A
1 609 92A 8JB | (08.12.2023)
– Aim the laser at the closer wall A and al-
low the measuring tool to level in. Mark
B
the middle of the point at which the laser
lines cross on the wall (point I).
– Turn the measuring tool 180°, allow it to
level in and mark the point where the
B
laser lines cross on the opposite wall B
(point Ⅱ).
– Align the height of the measuring tool
(using the tripod or by placing objects
B
underneath as required) so that the
point where the laser lines cross exactly
hits the previously marked point Ⅱ on
wall B.
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