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5. Turn the laser 180° towards wall B and mark the center of the cross beams as b1 on the
wall.
a1
6. Move the laser level towards wall B and position it approximately 0.5 meter from wall B.
7. Mark on wall B the center of the cross beams as b2.
If the b1 & b2 is not overlapping, adjust the tripod height to make sure b1& b2 overlapping.
A
a1
8. Turn the laser 180° towards wall A, and mark on the wall the center of the cross beams
as a2.
A
a2
2 2
2 2
a1
a1
9. Measure the distances:
Δa= |a2 - a1|
Δb= |b1- b2|
10. The diff erence | Δa – Δb| should be no more than 3 mm for CLR215 or 4 mm for CLG220.
180°
b1
B
b2
b1
B
180°
b2
b1
8
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