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Controls and Displays L4
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note: The leveling screws are
at 90
º
to the leveling pivot
point, which is directly below
the circular vial. As you face
the control panel and look
down at the circular vial, the
leveling screw on your right
controls bubble movement
from left to right. The leveling
screw at the back, below the
battery door, controls bubble
movement from front to back.
Turning the leveling screw on
your right in a clockwise
motion will move the bubble to
the right and turning the back
leveling screw in a clockwise
motion will move the bubble to
the back. Turning each screw
counter-clockwise will have
the opposite effect.
Power button • When pressed, the rotating mirror will begin to spin and
the laser beam will be projected if the circular level is centered. If the
laser is not level enough to operate, the limit indicator will flash.
Circular level vial • The circular level indicates when the laser is rough
leveled enough to allow the automatic compensator to work.
Leveling knobs • Use to center the bubble in the circular level vial. The
leveling knobs are also used during vertical alignment (see page 13)
Leveling Limit indicator • If the L4 is powered on, but not level enough
to automatically compensate, the limit indicator will flash, the rotating
mirror will not spin, and no laser beam will be projected.
Low battery indicator • Will flash when the batteries need to be replaced
and the beam will turn off. A spare set of batteries can be carried in the
laser case to prevent downtime.
Vertical vial • Used to plumb the plane of laser light when the laser is in
the vertical mode (see page 7). The laser is completely manual in the
vertical mode and will not shut-off if the vertical vial is not centered.
Checking & Adjusting Calibration
7. Remove the upper black rubber plug below the control panel. Using a
3/32" hex driver, adjust the X-axis calibration. Turning the screw clockwise
will raise the beam in the -X-axis (see opposite page). One full turn of the
screw will make approximately a 3/4"(19mm) change at 100'(30m) turn the
screw a little at a time until the beam matches the true level mark. Do not
move the laser or platform during this adjustment.
8. Check the X-axis adjustment: rotate the laser back to the first direction
and re-center the bubble. Check that the reading is within the needed
tolerance of the true level mark.
9. Rotate the laser 90 degrees to aim the +Y-axis (control panel) at the
target. Re-center the bubble. Check the reading at the target. If the reading
is on, or within tolerance of the true level mark, calibration is complete. If not,
continue on.
10. Remove the lower black rubber plug. Using a 3/32" hex driver, adjust
the Y-axis calibration. Turning the screw clockwise will raise the beam in the
+Y-axis (see opposite page). One full turn of the screw wil l make
approximately a 3/4"(19mm) change at 100'(30m) turn the screw a little at
a time until the beam matches the true level mark. Do not move the laser or
platform during this adjustment.
11. Rotate the laser 180 degrees. The -Y-axis is now aimed at the target.
Re-center the bubble.
12. Compare the elevation of this axis to the true level mark. If the
difference between this reading and true level is within you r working
tolerance, calibration is complete. If not, use the procedure in step 10 to
balance this axis with the +Y-axis.
Calibration is now complete.
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