Leveling Accuracy - Bosch GLL3-80 Operating/Safety Instructions Manual

for the human eye. Therefore, shut off the
pulse function by pushing button 3 again
when working without laser receiver. When
the pulse function is switched off, the pulse-
function indicator 5 is deactivated.
Automatic Leveling
Working with Automatic Leveling
Position the tool on a level and firm support,
attach it to the WM1 positioning device 19 or
to the tripod 23.
When working with automatic levelling, push
the On/Off switch 7 to the "
After switching on, the leveling function
automatically compensates irregularities
within the self-leveling range of ±4°. The
leveling is finished as soon as the laser
beams do not move any more.
If automatic leveling is not possible, e.g.
because the surface on which the tool stands
deviates by more than 4° from the horizontal
plane, the laser lines begin to flash rapidly.
When the audio signal is activated, a fast-beat
signal sounds for 30 s (maximum). This alarm
is deactivated within 10 s after switching on, in
order to allow adjustment of the tool.
Set up the tool in level position and wait for
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
should always be mounted on a tripod when
distances exceeding 20 m. If possible, also
set up the tool in the center 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.
Firstly, check the leveling accuracy of the
horizontal laser line and 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.
on" position.
Leveling Accuracy
the self-leveling to take place. As soon as the
tool is within the self-leveling range of ±4°,
all laser beams light up continuously and the
audio signal is switched off.
In case of ground vibrations or position
changes during operation, the tool is
automatically leveled in again. To avoid
errors, check the position of the horizontal and
vertical laser line with regard to the reference
points upon releveling.
Working without Automatic Leveling
For working without automatic leveling, slide
the On/Off switch 7 to the "
When automatic leveling is switched off,
indicator 6 lights up red and for the first 30 s
laser beams flash slowly.
When the automatic leveling is switched off,
the tool can be held by hand or placed on an
inclined surface. In cross-line operation, the
two laser lines do not necessarily run at a
right angle to each other.
• Always use the center of the laser line
for marking. The width of the laser line
changes with the distance.
OBJ_BUCH-1046-001.book Page 11 Thursday, August 20, 2009 8:20 A
Checking the Horizontal Leveling
A free measuring distance of 16 ft on a
firm surface in front of two walls A and B is
– Montieren Sie das Messwerkzeug nahe der
required for the check.
Wand A auf einem Stativ
– Mount the tool onto a tripod, or place it on a
tool
auf festen, ebenen Unte
firm and level surface close to the wall A.
das Messwerkzeug im Betrieb mit Nivellier-
Switch the tool on. Select cross-line
automatik ein. Wählen Sie die Betriebsart, in
operation with automatic leveling. Select
der eine waagrechte Laserebene sowie eine
the operating mode in which a horizontal
senkrechte Laserebene frontal vor dem
and vertical laser plane is g e n e r a t e d i n
Messwerkzeug erzeugt werden.
front of the tool.
– Richten Sie den Laser auf die nahe Wand A
und lassen Sie das Me
ren. Markieren Sie die Mitte des Punktes, an
-9-
dem sich die Laserlinien an der Wand A kreu-
zen (Punkt
on" position.
Working Advice
Accuracy.
oder stellen Sie es
rgrund. Schalten Sie
16 ft (5m)
sswerkzeug einnivellie-
I).
B
– R