Initial Operation; Switching On And Off; Operating Modes - Bosch GLL 2-20 Instrucciones De Funcionamiento Y Seguridad

Initial Operation

Protect the tool against
! WARNING
moisture and direct sun
irradiation.
• Do not subject the tool to extreme
temperatures or variations in
temperature. As an example, do not leave
it in vehicles for longer periods. In case of
large variations in temperature, allow the
tool to adjust to the ambient temperature
before putting it into operation. In case
of extreme temperatures or variations in
temperature, the accuracy of the tool can be
impaired.
• Avoid heavy impact or and prevent
the tool from falling. Damage to the
measuring tool can impair its accuracy.
After heavy impact or shock, compare the
laser line with a known horizontal or vertical
reference line.
•
Switch the tool off during transport.
When switching off, the leveling unit,
which can be damaged in case of intense
movement, is locked.

Switching On and Off

To switch on the tool, slide the On/Off switch
2 to the "On" position. Immediately after
switching on, the tool sends laser beams out of
the exit openings 1.
Do not point the laser beam
! WARNING
at persons or animals and
do not look into the laser beam yourself, not
even from a large distance.
To switch off the tool, slide the On/Off switch
2 to the "off" position. When switching off, the
leveling unit is locked.
Do not leave the switched
! WARNING
on measuring tool
unattended and switch the tool off after
use. Other persons could be blinded by the
laser beam.

Operating Modes

After switching on, the measuring tool is in
cross-line operating mode with automatic
leveling.
To change the operating mode, press the
"Mode" button 8 until the requested operating
mode is indicated by the corresponding
illuminated operating mode indication 10.
Operation
Indication
All three operating modes can be selected
either with or without automatic leveling.
The following operating modes are available.
Working with Automatic Leveling
(figure A - D)
When working with automatic leveling, the
indicator for working without automatic leveling
11 may not be lit. If required, switch the
automatic leveling "on" again by pressing the
"Lock" button 7 so that the indicator 11 goes
out.
Position the tool on a level and firm support or
attach it to positioning device 12 or a 1/4"-20
thread tripod 21.
After switching on, the leveling function
automatically compensates irregularities within
the self-leveling range of ±4°, the leveling
warning indicator 9 goes out and the laser is
switched on.
If the automatic leveling 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-leveling to take place.
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 re-leveling.
Influences on Tool Accuracy
The ambient temperature has the greatest
influence. Especially temperature differences
occurring from the ground upward can divert
the laser beam.
-9-
Operating Mode
Cross-line operation (see figures
A, B and E): The measuring tool
generates a horizontal laser plane
(360° laser line) and a vertical laser
line.
Horizontal operation (see Figure
C): The measuring tool generates a
horizontal laser plane.
Vertical operation (see figure D):
The measuring tool generates a
vertical laser line.
Automatic Leveling