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Inserting/Changing the batteries
It is recommended that you use alkaline
manganese batteries to operate the
measuring tool.
Press the locking mechanism (8) upwards
to open the battery compartment cover
(9) and remove the battery compartment
cover. Insert the batteries.
When inserting the batteries, ensure that
the polarity is correct according to the
illustration on the inside of the battery
compartment.
The battery indicator (3) always indicates
the current status of the battery. If the
batteries are running low, the laser lines
will gradually become dimmer. If the
Starting Operation
Protect the measuring
tool from moisture and
direct sunlight.
measuring tool to any
extreme temperatures or fluctuations in
temperature. The precision of the
measuring tool may be compromised if
exposed to extreme temperatures or
fluctuations in temperature. For example,
do not leave it in a car for extended
periods of time. If it has been subjected to
significant fluctuations in temperature,
first allow the measuring tool to adjust to
the ambient temperature and then always
carr y out an accuracy check before
continuing work (see "Leveling Accuracy",
page 12).
k n o c k s
measuring tool and avoid dropping it.
Always carry out an accuracy check before
continuing work if the measuring tool has
been subjected to severe external
influences (see "Leveling Accuracy", page
12).
2610059938 GLL50-40G 02-21.indd 10
Preparation
Operation
Do not expose the
A v o i d
s u b s t a n t i a l
t o
t h e
batteries are almost empty the battery
indicator starts flashing continuously and
the laser lines will blink every 5 min for
5 s until the tool turns off. If the batteries
are empty, the laser lines and the battery
indicator will flash once before the
measuring tool switches off.
Always replace all the batteries at the
same time. Only use batteries from the
same manufacturer and which have the
same capacity.
when you are not using it for a
prolonged period of time. The batteries
can corrode and self-discharge during
prolonged storage in the measuring tool.
transporting it. The pendulum unit is
locked when the tool is switched off, as it
can otherwise be damaged by extreme
movements.
Switching On/Off
To switch on the measuring tool, slide the
on/off switch (2) to the "On" position. As
soon as it is switched on, the measuring
tool emits laser beams from the laser
beam outlet window (1).
animals and do not stare into the laser
beam yourself (even from a distance).
Serious eye injury could result.
To switch off the measuring tool, slide the
on/off switch (2) to the Off position. The
pendulum unit is locked when the tool is
switched off.
unattended when switched on, and
ensure the measuring tool is switched off
after use. Others may be blinded by the
laser beam.
-10-
Take the batteries out
of the measuring tool
Switch the measuring
t o o l
o f f
w h e n
Do not direct the laser
beam at persons or
N e v e r
l e a v e
m e a s u r i n g
t o o l
2/23/21 3:03 PM
t h e
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