15
8) Turn the laser 180° towards wall
A
, and mark the center
of the cross lines as
a2
on the wall (see figure 4).
9) Measure the distances:
Δa=
|a2
-
a1
|
Δb= |
b1
-
b2
|
10) The difference | Δa – Δb| should be no more than
4 mm, otherwise send the laser level to a qualified
technician for repair.
Checking the Level Accuracy of the Horizontal Line.
(Side to side inclination)
1) Set up the laser on a tripod or on a flat surface at a
distance of approximately 1.5 meters from a 5 meter long wall.
2) Unlock the pendulum and press the button to project the
horizontal and the vertical cross lines towards the wall.
B
A
a1
b1
x
b2
x
x
a2x
180°
Figure # 4