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13
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
mount the measuring tool on a tripod and position it 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 level-
ling 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 vertical 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. Select cross-line mode with
automatic levelling.
A
B
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).
Bosch Power Tools
1 609 92A 58R | (04.03.2020)
