17
13) Measure the distances:
Δa= |
a2
-
a1
|
Δb= |
b1
-
b2
|
14) The difference | Δa – Δb| should be no more than 2.25 mm,
otherwise send the laser level to a qualified technician for
repair.
15) Mark the dots only with laser beams leveled - leveling
indicator (e) not blinking. Repeat the procedure for upper
horizontal beam.
A
B
Figure # 4
C
a2
0.5m
X
2m
b1
X
b2
X
a1
X
180°