Bosch GPL100-30G Consignes D'utilisation/De Sécurité page 19

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.
Should the measuring tool exceed the maximum deviation dur-
ing one of the tests, please have it repaired by a Bosch after-
sales service.
Checking the horizontal levelling accuracy
For this check, you will need a free measuring distance of 16 ft
(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.
– Aim the horizontal laser beam that runs parallel to the longitu-
dinal axis of the measuring tool at the closer wall A and allow
the measuring tool to level in. Mark the centre of the laser
point on the wall (point I).
GPL100-30G 50G 11-20.indd 19
A
16 ft (5 m)
-19-
B
4/23/21 5:27 PM