Automatic Downwards Plumb Point Function In The Vertical Position; Centre Line Mode; Mask Mode (See Figure C); Automatic Levelling - Bosch GRL 600 CHV Professional Notice Originale

42 | English
To rotate the rotational plane, press the ▲ button (4) or the
▼ button (3) on the measuring tool or the up (31) or
down (36) slope button on the remote control until the re-
quired position is reached.
Automatic downwards plumb point function in the
vertical position
When the measuring tool is in the vertical position, the vari-
able laser beam (8) can automatically be aligned vertically
downwards for plumbing by using the remote control or via
the Bosch Levelling Remote App.
To start the downwards plumb point func-
tion, press the plumb point function but-
ton (26) on the remote control. The plumb
point function symbol will appear on the dis-
play while the variable laser beam is aligned
vertically. After it has been successfully
aligned, the plumb point function indic-
ator (e) will appear on the start screen.
Note: Possible rotation of the rotational plane around the
Y‑axis is not in the form of rotation around the plumb point.

Centre line mode

In centre line mode, the measuring tool automatically at-
tempts to align the laser beam to the centre line of the laser
receiver by moving the rotation head up and down. The laser
beam can be aligned to the X‑axis or the Y‑axis of the meas-
uring tool.
Centre line mode is started at the laser receiver. For this,
please read and observe the operating instructions for the
laser receiver.
During the search, the centre line mode symbol
for one or both axes will appear on the display
of the measuring tool and the status indic-
ator (12) will flash red.
If the laser beam was able to be aligned to the centre line of
the laser receiver, the centre line mode will automatically fin-
ish and the slope found will be indicated on the start screen.
If the laser beam could not be aligned to the
centre line of the laser receiver, an error mes-
sage will appear on the display. Before restart-
ing the function, check the position of the meas-
uring tool and the laser receiver.
Mask mode (see figure C)
In rotational operation, the variable laser beam (8) can be
switched off for one or more quadrants of the rotational
plane. This makes it possible to limit the risk related to laser
beams to certain areas. Interference from the laser beam
that affects other tools or interference with the laser receiver
by unintended reflections can also be avoided.
The switching off of individual quadrants can only be con-
trolled by using the Bosch Levelling Remote App. The
quadrants in which the laser beam is visible can be seen in
the laser operating mode indicator (a) on the start screen.
1 609 92A 55C | (05.11.2019)

Automatic Levelling

Overview

After switching on, the measuring tool checks the horizontal
and vertical position and automatically levels out any un-
evenness within the self-levelling range of approx. ±8.5%
(±5°).
The symbol for levelling flashes on the dis-
play during levelling. The status indic-
ator (12) on the measuring tool and the
status indicator for the respective axis ((35)
or (34)) on the remote control flash a uni-
form green.
The rotation is stopped until levelling has been completed
and the laser beams are flashing. The start screen will ap-
pear after levelling has been successfully completed. The
laser beams will light up continuously and rotation will start.
The status indicator (12) on the measuring tool and the
status indicator for the levelled axis ((35) or (34)) on the re-
mote control will light up green continuously.
If the measuring tool is at a slant of
more than 8.5% or is positioned dif-
ferently to the horizontal or vertical
position, levelling will no longer be
possible. An error message will ap-
pear on the display and the status
indicator (12) will flash red.
Reposition the measuring tool and wait for it to re-level.
If the maximum levelling time is ex-
ceeded, levelling will be discontin-
ued with an error message.
Reposition the measuring tool and briefly press the on/off
button (11) to restart levelling.

Position changes

When the measuring tool is levelled in, it continuously
checks the horizontal and vertical position. Re-levelling is
automatically performed if there are any position changes.
Minimal position changes are levelled out without inter-
rupting the operation. This automatically compensates sub-
soil ground vibrations or weather influences.
For larger position changes, the rotation of the laser beam
will be stopped in order to avoid faulty measurements during
the levelling process and the laser beams will flash. The lev-
elling symbol appears on the display. The shock-warning
function will be actuated, if required.
The measuring tool will automatically detect the horizontal or
vertical position. To change between the horizontal and
the vertical position, switch the measuring tool off, reposi-
tion it and switch it on again.
If the position is changed without switching
on/off, an error message will appear and the
status indicator (12) will quickly flash red.
Briefly press the on/off button (11) to re-
start levelling.
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