Calibration - Laser Reference Pro Shot Alpha Operation Manual

8
Calibration is your responsibility, check it often.
It is well worth the effort to check calibration before you first use your laser,
and then periodically to ensure that you are doing the highest quality work.
Always check calibration if the laser has been handled roughly.
Follow the steps below to check the calibration of the laser and make
adjustments if necessary.
1. Attach the laser to a flat head tripod approximately 100 feet from a wall or
other stable vertical surface, (at telephone pole or building wall will work).
The tripod head must be level enough to allow you to turn the laser 360
degrees with minimal re-leveling needed. Use the tripod leg adjustments to
level the tripod head. Position the laser so that either direction of the cross
(X) axis is pointed at the target.
2. Turn the laser on and allow it to level.
3. Take the receiver to the target and move it up or down until you get a on
grade display in the LCD, or a steady tone. Make an on grade mark using
the receiver's beam center notch.
4. Return to the laser, rotate it 180 degrees, and allow it to re-level. The
opposite cross axis direction is now aimed at the target. Use the receiver to
make another on grade mark at the target.
5. If there is a difference between the two marks, make another mark half
way between them. This third mark represents true level. If the distance
between the outer marks and the center mark is within the accuracy specifi-
cation of the laser, go to step 9. If not, continue with the next step.
6. Remove the battery door and the rubber plug on the lower left side of the
battery holder. The four buttons switches control calibration of the laser. A
label shows the axis and direction of travel that each button controls. Each
push of a button moves the calibration by approximately 3 arc seconds,
(1/64" @ 100') / .4mm @ 30m). Use a small screwdriver or dull pencil to
press the plus or minus X axis button to bring the beam to the true level
mark. Go to the target and check the beam elevation. If the elevation is
correct, continue to the next step, if not, repeat this step until the beam
reaches the correct height.
7. Check the cross axis adjustment by rotating the laser 180 degrees to the
first position, let it re-level, and check that the beam is on the true level mark.
8. Rotate the laser 90 degrees so that either direction of the Y axis is aimed
at the target. Allow the laser to re-level and make an elevation mark at the
target. If the distance between this mark and the true level mark is within the
laser's accuracy specification, calibration is complete. If not, continue to the
next step.
9. Use the Y axis push buttons to move the beam until it coincides with the
true level mark. Calibration is complete.