-9-
Initial Operation
• Protect the tool against moisture and
direct sun irradiation.
• Do not subject the tool to extreme
temperatures or variations in
temperature.
Asan example, do not leave it in vehicles
for longer periods. In case of large
variationsin temperature, allow the
tool to adjust to the ambient temperature
before putting it into operation. In case of
extreme temperaturesor variationsin
temperature, the accuracy of the tool can
be impaired.
• Avoid heavy impact or falling of the
tool. After heavy exterior impact on the
tool, an accuracy check should alwaysbe
carried out before continuing to work (see
“Leveling Accuracy”).
• Switch the tool off during transport.
When switching off, the leveling unit,
which can be damaged in case of intense
movement, islocked.
Switching On and Off
To switch on the tool, push the On/Off switch
7to the “ on” position (when working
without automatic leveling) or to the “
on” position (when working with automatic
leveling). Immediately after switching on, the
tool sendslaser beamsout of the exit
openings1.
• 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 tool, push the On/Off
switch 7to the “off” position. When switching
off, the leveling unit islocked.
Deactivating the Automatic Shut-off The tool
switchesoff automatically after an operating
duration of 30 minutes. To deactivate the
automatic switch-off, keep the operating
mode button 4pressed for 3swhile
switching on the tool. When the automatic
switch-off isdeactivated, the laser lines
briefly flash after 3s.
•Do not leave the switched on measuring
tool unattended and switch the
tool off after use. Other personscould be
blinded by the laser beam.
To activate the automatic shut-off, switch the
tool off and then on again (without the
operating mode button 4pushed).
Operating Modes (see figures A–D)
The tool has three operating modesbetween
which youcan switch at any time:
– Horizontal operation “–”: Producesa
horizontal laser line,
– Vertical operation “l”: Producesavertical
laser line,
– Cross-line operation “+”: Producesa
horizontal and vertical laser line.
All three operating modescan be selected in
the automatic leveling mode. In the locked
mode, either the horizontal operation or the
vertical operation mode can be selected.
After switching on, the tool isin cross-line
operating mode. To change the operating
mode, press the operating mode button 4.
Pulse Function
The LR2 laser receiver allowsthe GLL2-50
to be used in situationsin which the lines
cannot be seen. The pulse function is
activated separately from the selection of the
operating mode. The GLL2-50 doesnot work
with other laser receivers.
In pulse function, the laser linesflash at very
high frequency and thus become detectable
for the laser receiver 16.
To switch on the pulse function, press button
3. When the pulse function isswitched on,
the pulse-function indicator 2lightsup green.
When the pulse function isswitched on, the
visibility of the laser linesisreduced for the
human eye. Therefore, shut off the pulse
function by pushing button 3again when
working without laser receiver. When the
pulse function isswitched off, the pulse-
function indicator 2isdeactivated.
Automatic Leveling
Working with Automatic Leveling (see
figure C)
Position the tool on alevel and firm support
or attach it to acommercially available
photographic tripod.
When working with automatic leveling, push
the On/Off switch 7to the “ on” position.
After switching on, the leveling function
automatically compensatesirregularities
within the self-leveling range of ±4°. The tool
islevelled in as soon as the laser linesno
longer flash.
Operation
