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The switching off of individual quadrants can
only be controlled by using the Bosch Level-
ing Remote App. The quadrants in which the
laser beam is visible can be seen in the laser
operating mode indicator (a) on the home
screen.
Automatic leveling
Overview
After switching on, the laser level checks the
horizontal and vertical position and automati-
cally levels out any unevenness within the self-
leveling range of approx. ±8.5% (approx 5°).
The leveling indicator flashes on
the display during leveling. The
status display (12) on the laser
level and the status display for the
respective axis ((35) or (34)) on the remote
control flash a uniform green at the same
time.
The rotation is stopped until leveling has been
completed and the laser beams are flashing.
The home screen will appear after leveling
has been successfully completed. The laser
beams will light up continuously and rotation
will start. The status display (12) on the laser
level and the status display for the levelled
axis ((35) or (34)) on the remote control will
light up green continuously.
If the laser level is at a slant
of more than 8.5%, leveling
will no longer be possible.
An error message will ap-
pear on the display and the status display
(12) will flash red.
Reposition the laser level and wait for it to re-
level.
If the maximum leveling
time is exceeded, leveling
will be discontinued with
an error message.
Reposition the laser level and briefly press the
on/off button (11) to restart leveling.
Position changes
When the laser level is levelled in, it continu-
ously checks the horizontal and vertical posi-
tion. Re-leveling is automatically performed if
there are any position changes.
Minimal position changes are levelled out
without interrupting the operation. This auto-
matically compensates subsoil ground vibra-
tions or weather influences.
For larger position changes, the rotation of
the laser beam will be stopped in order to
avoid faulty measurements during the leveling
process and the laser beams will flash. The
leveling indicator will appear on the display.
The shock-warning function will be actuated,
if required.
The GRL4000-80CHV will automatically detect
the horizontal or vertical position. To change
between the horizontal and the vertical po-
sition, switch the laser level off, reposition it
and switch it on again.
If the position is changed without
switching on/off, an error mes-
sage will appear and the status
display (12) will quickly flash red.
Briefly press the on/off button (11) to restart
leveling.
Shock-warning function
The laser level has a shock-warning function.
After position changes or shock to the mea-
suring tool, or in case of ground vibrations,
it keeps the laser level from levelling in at
changed positions, and thus prevents errors
caused by a change in the laser level’s posi-
tion.
Activating the shock-warning function:
The shock-warning
function is switched
on automatically. It is
activated approxi-
mately 30 seconds after the laser level has
been switched on. During activation, the
shock-warning indicator (c) will light up on
the display. The indicator lights up continu-
ously after activation.
Shock warning actuated:
If the position of the
laser level is changed
or a severe knock is
registered, the shock
warning will be actuated. The laser will stop
rotating and an error message will appear.
The status display (12) will quickly flash red
and a warning signal will sound at a faster
rate.
Confirm the warning message with by
pressing the slope button (14) on the laser
level or the slope button (32) on the remote
control. When working with automatic level-
ling (including slope operation), levelling is
automatically restarted.
