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Installing AA Batteries
GB
Load new AA batteries in the STHT77504-1 or
STHT77594-1 laser.
1.
Turn the laser upside down.
2.
On the bottom of the laser, lift up the latch to open
the battery compartment cover (Figure
3.
Insert four new, high-quality, name brand AA
batteries, making sure to position the - and + ends of
each battery as noted inside the battery compartment
(Figure
).
B 2
4.
Push the battery compartment cover closed until it
snaps in place (Figure
When the laser is not in use, keep the Power/
Transport Lock switch in the center (OFF) position
(Figure
) to save battery power.
A 2
Turning the Laser On
1.
Place the laser on a smooth, flat, level surface,
with the laser facing straight ahead toward the
opposing wall (0º position).
2.
Turn the laser ON to display a horizontal laser
beam. Either:
• Move the Power/Transport Lock switch to the
left to keep the pendulum locked and display
the beams in manual mode (Figure
• Move the Power/Transport Lock switch to the
right to unlock the pendulum and display the
beams in self-leveling mode (Figure
3.
Press
(Figure
a horizontal laser beam, a second time to display
a vertical beam, and a third time to display both the
horizontal and vertical beams.
4.
Check the laser beams.
• If the laser is tilted so much that it cannot
self-level
(> 4°), or the laser is not level in manual mode,
the laser beams will flash.
• If the laser beams flash, the laser is not level
(or plumb) and should NOT BE USED for
determining or marking level or plumb. Try
repositioning the laser on a level surface.
10
).
B 1
).
B 3
A 1
A 3
) once to display
A 4
5.
If ANY of the following statements are TRUE,
continue with the instructions for Checking Laser
Accuracy BEFORE USING THE LASER for
a project.
• This is the first time you are using the laser
(in case the laser was exposed to extreme
temperatures).
• The laser has not been checked for accuracy
in a while.
• The laser may have been dropped.
Checking Laser Accuracy
The laser tools are sealed and calibrated at the factory. It is
recommended that you perform an accuracy check prior
to using the laser for the first time (in case the laser
was exposed to extreme temperatures) and then regularly
to ensure the accuracy of your work. When performing
any of the accuracy checks listed in this manual,
follow these guidelines:
• Use the largest area/distance possible, closest
to the operating distance. The greater the area/
distance, the easier to measure the accuracy of
the laser.
• Place the laser on a smooth, flat, stable surface
that is level in both directions.
• Mark the center of the laser beam.
).
Horizontal Beam - Scan Direction
Checking the horizontal scan calibration of the
laser requires two walls at least 30' (9m) apart. It
).
is important to conduct a calibration check using
a distance no shorter than the distance of the
applications for which the tool will be used.
1.
Place the laser against the end of the wall (Figure
).
D 1
2.
Move the Power/Transport Lock switch to the
right (Figure
leveling mode and display a horizontal laser beam.
3.
At least 30' (9m) apart along the laser beam,
mark
and
a
4.
Turn the laser 180º.
) to turn the laser ON in self-
A 3
.
b
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