Product Manual

-14-
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
always mount the measuring tool on a tri-
pod for measuring distances of 65 ft (20 m)
or more. In addition, position the measuring
tool in the center 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 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
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 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, level
surface. Switch on the measuring tool
and select cross-line operation.
16 ft (5 m)
A
B
– 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).
180°
A
B
– 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
rotating it – close to wall B, switch it on
and allow it to level in.
A
B
– Align the height of the measuring tool
(using the tripod or by placing objects
underneath as required) so that the point
where the laser lines cross exactly hits
the previously marked point II on wall B.
d
180°
A
B
– Turn the measuring tool 180° without
adjusting the height. Aim it at wall A such
that the vertical laser line runs through
the already marked point I. Allow the
measuring tool to level in and mark the
point where the laser lines cross on wall
A (point III).
– The discrepancy d between the two
marked points I and III on wall A reveals
Leveling Accuracy