16
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.
x
a2
x
a1
x
b1
b2
x
A
B
180°
Figure # 4
