Bosch Professional GLL 3-50 Manual Original página 15

If the battery warning (5) flashes red, the batteries must be
replaced.
Always replace all the batteries at the same time. Only use
batteries from the same manufacturer and which have the
same capacity.
Take the batteries out of the measuring tool when you
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are not using it for a prolonged period of time. The bat-
teries can corrode and self-discharge during prolonged
storage in the measuring tool.
Working with the rotating platform
You can use the rotating platform (16) to rotate the measur-
ing tool 360° around a central, always visible plumb point.
This enables you to set up the laser lines precisely, without
having to change the position of the measuring tool.
(13)
(17)
(16)
Place the measuring tool with the guide groove (13) on the
guide rail (17) of the rotating platform (16) and slide the
measuring tool as far as it will go onto the platform.
To disconnect the measuring tool, pull it off the rotating plat-
form in the opposite direction.
To adjust the height of the rotating platform, unscrew and re-
move the locking screw (14) of one of the telescopic legs.
Lock the telescopic leg by tightening the locking screw. Re-
peat the process for the other two telescopic legs.
If the measuring tool is mounted on the rotating
platform (16), you can use the fine adjustment screw (15)
to align vertical laser lines precisely with reference points.
Operation
Starting Operation
Protect the measuring tool from moisture and direct
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sunlight.
Do not expose the measuring tool to any extreme tem-
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peratures or fluctuations in temperature. For example,
do not leave it in a car for extended periods of time. If it
has been subjected to significant fluctuations in temper-
ature, first allow the measuring tool to adjust to the ambi-
ent temperature and then always carry out an accuracy
check before continuing work (see "Accuracy Check of
the Measuring Tool", page 16).
The precision of the measuring tool may be compromised
if exposed to extreme temperatures or fluctuations in
temperature.
Avoid substantial knocks to the measuring tool and
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avoid dropping it. Always carry out an accuracy check
Bosch Power Tools
before continuing work if the measuring tool has been
subjected to severe external influences (see "Accuracy
Check of the Measuring Tool", page 16).
Switch the measuring tool off when transporting it.
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The pendulum unit is locked when the tool is switched off,
as it can otherwise be damaged by big movements.
Switching On/Off
To switch on the measuring tool, slide the on/off
switch (12) to the On position (for working with the pen-
dulum lock) or to the
matic levelling). As soon as it is switched on, the measuring
tool emits laser beams from the outlet apertures (1).
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).
To switch off the measuring tool, slide the on/off switch
(12) to the Off position. The pendulum unit is locked when
(14)
the tool is switched off.
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.
If the maximum permitted operating temperature of 40 °C is
exceeded, the tool shuts down to protect the laser diode.
Once it has cooled down, the measuring tool is operational
again and can be switched back on.
Deactivating the automatic shut-off function
If no button on the measuring tool is pressed for approx.
30 min, the measuring tool will automatically switch itself off
to preserve battery life.
To deactivate the automatic shut-off function, hold down the
laser mode button (4) for at least 3 s when switching on the
measuring tool. The laser beams will flash briefly after 3 s if
the automatic shut-off function is deactivated.
To activate the automatic shut-off function, switch the meas-
uring tool off and on again (without holding down the laser
mode button (4)).
Operating Modes
The measuring tool has several operating modes, which you
can switch between at any time:
– Horizontal mode combined with vertical mode: Generates
one horizontal and two orthogonal vertical laser lines
– Horizontal mode: Generates one horizontal laser line
– Cross-line mode: Generates one horizontal and one ver-
tical laser line
– Vertical mode: Generates two orthogonal vertical laser
lines
In all operating modes, a plumb point is projected onto the
floor.
Once switched on, the measuring tool is in horizontal mode
combined with vertical mode. To change the operating
mode, press the laser mode button (4).
All operating modes can be selected with both automatic lev-
elling or the pendulum lock.
English | 15
On position (for working with auto-
1 609 92A 92E | (28.09.2023)