Bosch Professional GLL 50 G Original Instructions Manual page 14

14 | English
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, flat surface.
Switch on 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 8K4 | (01.06.2023)
– 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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