13
Cone Error Checking
1) Set up the laser about 2 ft. (60 cm) away from a wall (a) or pole and
100 ft. (30 m) from another wall (b) or pole.
2) Turn the laser on. After it has self-leveled, mark the location of the
beam on the near wall (a). Always mark the center of the beam. If it’s
too bright to see the beam, use a detector.
3) Rotate the laser 180°. Mark the location of the beam on the far wall (b).
4) Now set up the laser about 2 ft. (60 cm) away from the far wall.
Mark the beam (b’) near the first mark (b).
5) Rotate the laser 180°. Mark the location of the beam on the other wall
(a’), near the first mark (a).
6) Compare the two sets of marks on the walls. If the difference between
aa’-bb’ exceeds 1/4" (6 mm), contact your local service center.
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