Kapro Prolaser Vector 873 GREEN Manuel D'utilisation page 20

4. Checking 90º accuracy between the 2 vertical beams.
This procedure requires a room of at least 5x5 meters with 4 walls.
1) Set up the laser on a table or on the floor in the middle of the room.
2) Unlock the pendulum, and press the V/H push button 4 times
to project the forward and the side vertical beams
(see figure 9).
A B
C
D
Figure # 9
Figure # 9
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