Inserting/Replacing the Battery
Alkaline batteries are recommended for
the tool.
To open the battery compartment 11, slide
the latch 10 in the direction of the arrow and
fold the battery lid up. Insert the batteries.
Insert batteries using correct polarity as
illustrated on the inside of battery lid.
When the batteries become weak, a 5
s audio signal will sound. The battery low
indicator 2 continuously flashes red.
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
t e m p e r a t u r e s o r v a r i a t i o n s i n
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
s w i t c h e d
unattended and switch the tool off after
use.
Do not point the laser
b e a m
or animals and do not look into the laser
2610048966 GLL3-300 01-18.indd 10
Preparation
Operation
D o
n o t
l e a v e
o n
t o o l
a t
p e r s o n s
When the batteries are weak when switching
on the tool, the 5 s audio signal will sound
directly after switching on the tool.
Always replace all batteries at the same time.
Only use batteries from one brand and with
the identical capacity.
• Remove the batteries from the tool
when not using it for extended periods.
When storing for extended periods, the
batteries can corrode and discharge
themselves.
beam yourself, not even from a large
distance.
To switch on the tool, slide the On/Off switch
7 to the "
on". position (when working
without automatic leveling) or to the "
on" position (when working with automatic
leveling). Immediately after switching on,
the tool sends laser beams out of the exit
openings 1.
To switch off the tool, slide the On/Off switch
7 to the " off " position. When switching off,
the leveling unit is locked.
When exceeding the maximum permitted
operating temperature of 104°F, the tool
switches off to protect the laser diode. After
cooling down, the tool is ready for operation
and can be switched on again.
Automatic Shut-off
When no button on the tool is pressed for
approx. 120 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 6 once or
press the receiver mode button 4 once.
Deactivating the Automatic Shut-off
To deactivate the automatic shut-off, keep the
operating mode button 6 pressed for at least 3
t h e
s (while the tool is switched on). Deactivation
of the automatic shut-off is confirmed by brief
flashing of the laser beams.
Activating the Automatic Shut-off
To a c t i v a t e t h e a u t o m a t i c s h u t - o ff ,
switch the tool off and then on again.
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