Inserting/Replacing The Batteries; Initial Operation; Operation Modes - Bosch GLL 3-50 Professional Originalbetriebsanleitung

14 | English
19 Rotating platform
20 Magnets
21 Laser target plate
22 Construction tripod BS 150*
23 Laser viewing glasses*
24 Universal holder BM 1*
25 Telescopic rod BT 350*
26 Measuring plate with stand*
27 Laser receiver*
28 Holder*
29 Case*
* The accessories illustrated or described are not included as
standard delivery.
Assembly

Inserting/Replacing the Batteries

Alkali-manganese batteries are recommended for the meas-
uring tool.
To open the battery lid 8, pull latch 10 and fold the battery lid
out. Insert the batteries. When inserting, pay attention to the
correct polarity according to the representation on the out-
side of the battery lid.
When the battery indication 5 flashes red, the batteries must
be replaced.
Always replace all batteries at the same time. Only use batter-
ies from one brand and with the identical capacity.
 Remove the batteries from the measuring tool when
not using it for extended periods. When storing for
extended periods, the batteries can corrode and self-
discharge.
Using the Rotating Platform
Extending the Telescopic Legs
1 609 92A 25M | (16.2.16)
Place the measuring tool with the
guide groove 15 on the guide rail 16
of the rotating platform 19 and slide
the measuring tool to the stop onto
the platform. To disconnect, pull the
measuring tool in the opposite direc-
tion from the rotating platform.
Unscrew the locking screw
17 for the extendable
stand. Pull out the stand.
Lock the stand by tightening
the locking screw 17.
Repeat the process for the
other two stands.
Operation

Initial Operation

 Protect the measuring tool against moisture and direct
sun light.
 Do not subject the measuring tool to extreme tempera-
tures or variations in temperature. As an example, do
not leave it in vehicles for a long time. In case of large vari-
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 or falling of the measuring tool. Af-
ter heavy exterior impact on the measuring tool, an accura-
cy check should always be carried out before continuing to
work (see "Levelling Accuracy").
 Switch the measuring tool off during transport. When
switching off, the levelling unit, which can be damaged in
case of intense movement, is locked.
Switching On and Off
To switch on the measuring tool, slide the On/Off switch 14
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 14
to the "off" position. When switching off, the levelling unit is
locked.
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.
Deactivating the Automatic Shut-off
The measuring tool switches off automatically after an operat-
ing duration of 30 minutes. To deactivate the automatic
switch-off, keep the operating mode button 4 pressed for 3 s
while switching on the measuring tool. When the automatic
switch-off is deactivated, the laser lines briefly flash after 3 s.
 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.
To activate the automatic shut-off, switch the measuring tool
off and then on again (without the operating mode button 4
pushed).

Operation Modes

The measuring tool has four operating modes, between which
you can switch at any time:
– Horizontal operation (operating mode A): generates a
horizontal laser line
– Cross-line operation (operating mode B): generates a
horizontal and a vertical laser line
Bosch Power Tools