Kapro 883N Prolaser 3D All- Lines Manual Del Usuario página 21

5. Checking 90º accuracy between the 2 Vertical beams.
This procedure requires a room of at least 5x5 meters with 3
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 button switch #2, 3 times
to project the forward and the side vertical beams
3) Mark the center of the side vertical beam at 3 places;
• Point a1 on the left wall A, in the middle of the vertical line.
• Point b1 on the right wall B, in the middle of the vertical line.
• Point c1 on the table, in the middle of the cross lines of the
2 verticals.
4) Mark the point c2 on the front wall C, in the middle of the
vertical line (see figure # 7).
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