Starting Operation Of The Rotary Laser; Switching On/Off; Direction Indicators - Bosch GRL 400 H Professional Notice Originale

Starting Operation of the rotary laser

Setting up the measuring tool
Place the measuring tool on a stable surface in
the horizontal position or mount it on the
tripod (25).
Due to its high levelling accuracy, the measuring tool is very
sensitive to knocks and vibrations and changes in position.
Take care, therefore, that the measuring tool is stable to
avoid interruptions to the operation caused by relevelling.
Switching On and Off
To switch on the measuring tool, press the on/off
button (4). All indicators light up briefly. The measuring tool
emits the variable laser beam (2) from the outlet
aperture (1).
Do not direct the laser beam at persons or animals and
u
do not stare into the laser beam yourself (even from a
distance).
The measuring tool immediately starts automatic levelling.
During levelling, the status indicator (5) flashes green, the
laser does not rotate and flashes.
The measuring tool is levelled in as soon as the status
indicator (5) lights up green continuously and the laser lights
up continuously. After levelling is completed, the measuring
tool automatically starts in rotational operation.
Never leave the measuring tool unattended when
u
switched on, and ensure the measuring tool is
switched off after use. Others may be blinded by the
laser beam.
The measuring tool exclusively operates with fixed rotational
speed in rotational operation, which is also suitable for use
of a laser receiver.
When factory set, the shock-warning function is automatic-
ally switched on and the shock-warning function
indicator (3) lights up green.
To switch off the measuring tool, briefly press the on/off
button (4). When the shock warning has actuated (the
shock-warning function indicator (3) flashes red), briefly
press the on/off button once to restart the shock-warning
function and then press it briefly again to switch off the
measuring tool.
To save the batteries, the measuring tool is automatically
switched off when not within the self-levelling range for
more than 2 hours or when the shock warning is actuated for
more than 2 hours. Reposition the measuring tool and switch
on again.
Starting operation of the laser receiver
Setting up the laser receiver (see figure A)
Place the laser receiver at least 0.5 m away from the rotary
laser. For rotary lasers with multiple operating modes, select
the horizontal or vertical operation with the highest rota-
tional speed.
Bosch Power Tools
Position the laser receiver so that the laser beam can reach
the reception area (18). Align it so that the laser beam runs
straight through the reception area (as shown in the figure).

Switching On/Off

A loud audio signal sounds when switching on the
u
laser receiver. Therefore, keep the laser receiver
away from your ear or other persons when switching it
on. The loud sound can damage hearing.
To switch on the laser receiver, press the on/off
button (13). All display indicators light up briefly and two
audio signals sound.
After the laser receiver is switched on, the measuring accur-
acy is always set to "medium" and the audio signal is always
switched off.
To switch off the laser receiver, press the on/off
button (13) again.
If no button on the laser receiver is pressed for approx.
10 min and no laser beam reaches the reception area (18)
for 10 min, the laser receiver will automatically switch itself
off to preserve battery life. An audio signal indicates when
the laser receiver is switching off.
Selecting the setting of the centre line indicator
You can use the button adjusting the reception
accuracy (14) to specify the accuracy with which the posi-
tion of the laser beam is indicated as "centred" on the recep-
tion area:
– Measuring accuracy "fine" (indicator (f) on the display),
– Measuring accuracy "medium" (indicator (a) on the dis-
play).
An audio signal sounds every time the accuracy setting is
changed.

Direction indicators

The position of the laser beam in the reception area (18) is
indicated as follows:
– On the display (19) on the front and rear of the laser re-
ceiver by means of the "laser beam below centre line" dir-
ection indicator (c), the "laser beam above centre line"
direction indicator (g) and the centre line indicator (e),
– By an audio signal (optional) (see "Laser Beam Indicator
Audio Signal", page 18).
Laser receiver too low: If the laser beam hits the upper half
of the reception area (18), then the "laser beam above
centre line" direction indicator (g) appears in the display.
If the audio signal is switched on, a slow-beat signal sounds.
Move the laser receiver upwards in the direction of the ar-
row. When the laser beam is close to the centre line, only the
tip of the "laser beam above centre line" direction
indicator (g) is shown.
Laser receiver too high: If the laser beam hits the lower half
of the reception area (18), then the "laser beam below
centre line" direction indicator (c) appears in the display.
If the audio signal is switched on, a fast-beat signal sounds.
Move the laser receiver downwards in the direction of the ar-
row. When the laser beam is close to the centre line, only the
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