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Initial Operation
• Loud audio signals will sound under
certain conditions while operating the
tool. Therefore, keep the tool away from
your ear or other persons. The loud
audio signal can cause hearing damage.
Protect the tool against moisture and
direct sun light.
• Do not subject the tool to extreme
temperatures or variations in
temperature.
As an example, do not leave it in vehicles
for longer periods. In case of large
variations in temperature, allow the
tool to adjust to the ambient temperature
before putting it into operation. In case of
extreme temperatures or variations in
temperature, the accuracy of the tool can
be impaired.
• Avoid heavy impact or dropping of the
tool. After heavy exterior impact on the
tool, an accuracy check should always be
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, is locked.
Switching On and Off
To switch on the tool, slide the On/Off
switch 7 to the “ on”. position (when
working without automatic levelling) or to the
“ on” position (when working with
automatic levelling). Immediately after
switching on, the 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 tool, slide the On/Off
switch 7 to the “off” position. When switching
off, the levelling unit is locked.
When exceeding the maximum permitted
operating temperature of 45 °C, the tool
switches off to protect the laser diode. After
cooling down, the tool is ready for operation
and can be switched on again.
Deactivating the Automatic Shut-off
When no button on the tool is pressed for
approx. 30 minutes, the tool automatically
switches off to save the batteries.
To switch on the tool after automatic shut-off,
either slide the On/Off switch 7 to the “off”
position and then switch the tool on again or
press the operating mode button 4 once or
press teh pulse-function button 3 once.
To deactivate the automatic shut-off, keep
the operating mode button 2 pressed for at
least 3 s (while the tool is switched on).
Deactivation of the automatic shut-off is
confirmed by brief flashing of the laser
beams.
• Do not leave the switched on tool
unattended and switch the tool off after
use.
To activate the automatic shut-off, switch the
tool off and then on again.
Deactivating the Signal Tone
After the tool has been switched on,the audio
signal is always activated.
To deactivate/activate the audio signal, press
and hold the operating mode button 4 and
the pulse-function button 3 at the same time
for at least 3 s.
The audio signal activation and deactivation
are both confirmed by three short beeps.
Operating Modes
The tool has three operating modes between
which you can switch at any time:
– Horizontal operation: generates a
horizontal laser plane.
– Vertical operation: generates a vertical
laser plane.
– Cross-line operation: generates a
horizontal and vertical laser plane.
After switching on, the tool is in horizontal
operation. Press the operating mode button
4 to change the operating mode.
All three operating modes can be selected
either with or without automatic levelling.
Pulse Function
When working with the laser receiver 17,
the pulse function must be activated,
–independent of the selected operating
mode.
In pulse function, the laser lines flash at very
high frequency and thus become detectable
by the laser receiver 17.
To switch on the pulse function, press button
3. When the pulse function is switched on,
the pulse-function indicator 5 lights up green.
Operation