Bosch Professional GRL 350 HV Instructions Manual page 11

before continuing work if the measuring tool has been
subjected to severe external influences (see "Accuracy
Check of the Measuring Tool", page 14).
Take care if the laser grid is broken by the measuring
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tool falling over. You may cut yourself on the broken
edges of the grid.
Starting Operation of the Remote Control
When pressing the operating controls, it is possible to bring
the measuring tool out of its level position, so that the rota-
tion is briefly interrupted. This effect is avoided when using
the remote control.
The remote control will only work if it is fitted with batteries
that are sufficiently charged.
Set up the measuring tool in such a manner that the signals
of the remote control can directly reach one of the
sensors (9). If the remote control cannot be pointed directly
at a sensor, the working range will be reduced. By reflecting
the signal (e.g. against walls), the working range can be im-
proved even for indirect signals.
After pressing a button on the remote control, the signal
transmission indicator (28) will light up, indicating that a sig-
nal has been sent out.
It is not possible to switch the measuring tool on/off with the
remote control.
Starting Operation of the rotary laser
Keep the work area free from obstacles that could re-
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flect or obstruct the laser beam. For example, cover
any reflective or shiny surfaces. Do not measure
through panes of glass or similar materials. The meas-
urements may be distorted by a reflected or obstructed
laser beam.
Setting up the measuring tool
Horizontal position
Vertical position
Position the measuring tool on a stable surface in the hori-
zontal or vertical position, mount it on the tripod (39) or on
the wall mount (42) with the alignment unit.
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
Note: After the first time the tool is started up and before be-
ginning work, you should always perform an accuracy check
(see "Accuracy Check of the Measuring Tool", page 14).
To switch on the measuring tool, press the on/off
button (3). All indicators will quickly flash red (3×/s). The
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measuring tool emits the variable laser beam (8) and the up-
wards plumb point (11) from the outlet apertures (10).
Do not direct the laser beam at persons or animals and
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do not stare into the laser beam yourself (even from a
distance).
The measuring tool immediately starts automatic levelling.
During levelling, the X-axis (7) and Y-axis (6) status indicat-
ors flash green and the laser flashes in point operation.
The measuring tool is levelled as soon as the X-axis (7) and
Y‑axis (6) status displays light 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
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switched on, and ensure the measuring tool is
switched off after use. Others may be blinded by the
laser beam.
To switch off the measuring tool, press the on/off
button (3) until all indicators turn off.
Sleep Mode (Standby)
During breaks from work, you can set the measuring tool to
sleep mode using the remote control (21). This saves all the
settings and the shock-warning function remains activated.
To switch on sleep mode, press the sleep mode button (29)
on the remote control. All indicators on the measuring tool
will flash red slowly (1×/s).
To switch off sleep mode, press the sleep mode button (29)
again. You can also end sleep mode by briefly pressing the
on/off button (3) on the measuring tool.
Operating Modes
Path of X and Y axes
The path of the X and Y axes is marked on the housing above
the rotation head.
Operating Modes Overview
All three operating modes are possible with the measuring
tool in horizontal and vertical position.
Rotational operation
Rotational operation is especially recommen-
ded when using the laser receiver. It is possible
to select between different rotational speeds.
Line operation
In this operating mode, the variable laser beam
moves within a defined aperture angle. This in-
creases the visibility of the laser beam in com-
parison to rotational operation. You can select
between different aperture angles.
Point operation
In this operating mode, the best visibility of the
variable laser beam can be reached. For ex-
ample, it is used to easily project heights or to
check building lines.
Line and point operation are not suitable for use with the
laser receiver (37).
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1 609 92A 69Y | (23.04.2021)