Craftsman CMHT77629 User Manual page 11

Installing AA Batteries
Load new AA batteries in the CMHT77629 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 two new, high-quality, name brand AA batteries,
making sure to position the - and + ends of each battery
as noted inside the battery compartment (Figure
4.
Push the battery compartment cover closed until it snaps
in place (Figure ).
B 3
When the laser is not in use, keep the Power/Transport
Lock switch in the center (OFF) position (Figure
to save battery power.
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 the horizontal and vertical
laser beams. Either:
• Move the Power/Transport Lock switch to the left
to keep the pendulum locked and display the cross
beams in manual mode (Figure
• Move the Power/Transport Lock switch to the right
to unlock the pendulum and display the cross
beams in self-leveling mode (Figure
3. Check the horizontal and vertical 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.
4.
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B 1
).
B 2
Checking Laser Accuracy
The laser tools are sealed and calibrated at the factory.
It is recommended that you perform an accuracy check
)
A 2
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.
).
A 1
Horizontal Beam - Scan Direction
Checking the horizontal scan calibration of the laser
requires two walls at least 30' (9m) apart. It is important
).
A 3
to conduct a calibration check using a distance no
shorter than the distance of the applications for which
the tool will be used.
1.
2.
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.
Place the back of the laser against a wall and facing
straight ahead toward the opposing wall.
Move the Power/Transport Lock switch to the right
(Figure ) to turn the laser ON in self-leveling
A 3
mode and display the horizontal and vertical beams.
E
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