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8) Turn the laser 180° towards wall A, and mark on the wall
the center of the cross lines as a2 (see figure #4).
9) Measure the distances:
Δa = |a2-a1|
Δb = |b1-b2|
10) The difference |Δa – Δb| should not be more than 2 mm,
otherwise to send the laser level to a qualified technician
for repairs.
Checking the Level Accuracy of Horizontal Line.
(Side to side inclination)
1) Set up the laser on a tripod or on a solid surface at a
distance of approximately 1.5 meters from a wall 5 meter
long.
2) Unlock the pendulum and press the button to project the
horizontal and the vertical cross lines towards the wall.
Figure #4
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