Operating Modes; Automatic Levelling - Bosch GLL Professional 3-80 C Betriebsanleitung

OBJ_BUCH-3106-001.book Page 20 Friday, June 2, 2017 10:18 AM
20 | English
ations in temperature, allow the measuring tool to adjust to
the ambient temperature before putting it into operation.
In case of extreme temperatures or variations in tempera-
ture, the accuracy of the measuring tool can be impaired.
 Avoid heavy impact to or falling down of the measuring
tool. After severe exterior effects to the measuring tool, it
is recommended to carry out an accuracy check (see "Ac-
curacy Check of the Measuring Tool", page 21) each time
before continuing to work.
 Switch the measuring tool off during transport. When
switching off, the levelling unit is locked. Else it can be
damaged in case of intense movement.
Switching On and Off
To switch on the measuring tool, slide the On/Off switch 16
to the " On" position (when working without automatic lev-
elling) or to the " On" position (when working with auto-
matic levelling). Immediately after switching on, the measur-
ing tool sends laser beams out of the exit openings 1.
 Do not point the laser beam at persons or animals and
do not look into the laser beam yourself, not even from
a large distance.
To switch off the measuring tool, slide the On/Off switch 16
to the "Off" position. When switching off, the levelling unit is
locked.
 Do not leave the switched-on measuring tool unattend-
ed and switch the measuring tool off after use. Other
persons could be blinded by the laser beam.
When exceeding the maximum permitted operating tempera-
ture of 40 °C, the measuring tool switches off to protect the
laser diode. After cooling down, the measuring tool is ready
for operation and can be switched on again.
If the temperature of the measuring tool is approaching the
maximum permissible operating temperature, the laser lines
will gradually become dimmer.
Deactivating the Automatic Shut-off
When no button on the measuring tool is pressed for approx.
120 minutes, the measuring tool automatically switches off
to save the batteries.
To switch the measuring tool back on after automatic shut-off,
you can either slide the On/Off switch 16 to the "Off" position
first and then switch the measuring tool back on, or press either
the laser mode button 7 or the receiver mode button 5 once.
To deactivate the automatic shut-off function, hold down the
laser mode button 7 for at least 3 s (with the measuring tool
switched on). If the automatic shut-off function is deactivat-
ed, the laser beams will flash briefly as confirmation.
To activate the automatic shut-off, switch the measuring tool
off and then on again.
Deactivating the Signal Tone
After the measuring tool has been switched on, the audio sig-
nal is always activated.
To deactivate or activate the audio signal, simultaneously
press the laser mode button 7 and the receiver mode button
5 and hold them down for at least 3 s.
The audio signal activation and deactivation are both con-
firmed by three short beeps.
1 609 92A 3PX | (2.6.17)

Operating Modes

The measuring tool has several operating modes between
which you can switch at any time. These are for:
– Generating a horizontal laser plane,
– Generating a vertical laser plane,
– Generating two vertical laser planes,
– Generating a horizontal laser plane as well as two vertical
laser planes.
After you switch it on, the measuring tool generates a horizon-
tal laser plane. To change the operating mode, press the laser
mode button 7.
All operating modes can be selected both with and without au-
tomatic levelling.
Receiver mode
Receiver mode must be activated to work with the laser re-
ceiver 26 – regardless of which operating mode is selected.
In receiver mode the laser lines flash at very high frequency,
enabling them to be detected by the laser receiver 26.
To switch on receiver mode, press button 5. Indicator 6 will
light up green.
When receiver mode is switched on, the laser lines are less
visible to the human eye. For this reason, switch receiver
mode off by pressing button 5 again to work without a laser re-
ceiver. Indicator 6 will extinguish.

Automatic Levelling

Working with Automatic Levelling
Position the measuring tool on a level and firm support, attach
it to the holder 24 or to the tripod 30.
When working with automatic levelling, push the On/Off
switch 16 to the " On" position.
After switching on, the levelling function automatically com-
pensates irregularities within the self-levelling range of ±4°.
The levelling is finished as soon as the laser beams do not
move any more.
If automatic levelling is not possible, e.g. because the surface
on which the measuring tool stands deviates by more than 4°
from the horizontal plane, the laser lines begin to flash rapidly.
When the audio signal is activated, a fast-beat signal sounds.
Set up the measuring tool in level position and wait for the
self-levelling to take place. As soon as the measuring tool is
within the self-levelling range of ±4°, all laser beams light up
continuously and the audio signal is switched off.
In case of ground vibrations or position changes during opera-
tion, the measuring tool is automatically levelled in again. To
avoid errors, check the position of the horizontal and vertical la-
ser line with regard to the reference points upon re-levelling.
Working without Automatic Levelling
For work without automatic levelling, slide the on/off switch
16 to the " On" position. When automatic levelling is
switched off, the indicator 4 lights up red and the laser lines
continuously flash slowly.
When automatic levelling is switched off, you can hold the
measuring tool freely in your hand or place it on an inclined
surface. The laser lines no longer necessarily run perpendicu-
lar to each other.
Bosch Power Tools