Checking The Height Accuracy Of The Horizontal Line; Leveling Accuracy - Bosch GLL2-45 Instrucciones De Funcionamiento Y Seguridad

is levelled in as soon as the laser lines no
longer flash.
If the automatic levelling function is not
possible, e.g. because the surface on which
the tool stands deviates by more than 4° from
the horizontal plane, the laser beams flash. In
this case, bring the tool to the level position
and wait for the self-levelling to
take place.
In case of ground vibrations or position
changes during operation, the tool is
automatically levelled in again. To avoid errors,
check the position of the horizontal and
vertical laser line with regard to the reference
points upon re-levelling.
Influences on Accuracy
The ambient temperature has the greatest
influence. Especially temperature differences
occurring from the ground upward can divert
the laser beam.
Because the largest difference in temperature
layers is close to the ground, the tool should
always be mounted on a tripod when using for
distances exceeding 65 ft. If possible, also set
up the tool in the centre of the work area.
Apart from exterior influences, device specific
influences (such as heavy impact or falling
down) can lead to deviations. Therefore, check
the accuracy of the tool each time before
starting your work.
First, check both the height as well as the
leveling accuracy of the horizontal laser line,
then the leveling accuracy of the vertical laser
line.
Should the tool exceed the maximum
deviation during one of the tests, please have
it repaired by a Bosch
after-sales service center.
Checking the Height Accuracy of the
Horizontal Line
For this check, a free measuring distance
of approximately 26 feet on a firm surface
between two walls A and B is required.
– Mount the tool onto a tripod or place it on a
firm and level surface close to wall A.
Lock Mode - Working without Automatic
Levelling (see figure D)
For work without automatic levelling, push the
On/Off switch 7 to the "
the automatic levelling is switched off, the laser
line flash continuously.
When the automatic levelling is switched off,
the tool can be held by hand or placed on an
inclined surface.
Working Advice
!
The width of the laser line changes with the
distance.

Leveling Accuracy

Switch on the tool. Select cross-line
operation with automatic leveling.
– Direct the laser against the close wall A
and allow the tool to level in. Mark the
center of the point where the laser lines
cross each other on the wall (point I).
– Turn the tool by 180°, allow it to level in
and mark the cross point of the laser lines
on the opposite wall B (point II).
-10-
Always use the center of
CAUTION
the laser line for marking.
A
A
5 m
26 ft
A
180˚
A
180˚
on" position. When
B
B
B
B