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2. Checking the height accuracy of the cross created by
the front vertical and horizontal beams.
(Up and down deviation)
1) Place the laser on a table or on the floor between 3 walls
A, B and C. The distance between A and B should be
approximately 5 meters.
2) Place the laser level approximately 0.5 meters from wall A
and 2 meters from wall C.
3) Turn the device ON and activate the top horizontal and the 2
vertical beams.
4) Place the intersection point of the horizontal and the front
vertical beams towards wall A.
5) Repeat stage 1. procedure from steps 5 – 14.
6) Repeat the procedure for top horizontal beam.
3. Checking the Accuracy of the front vertical beam.
1) Hang an approximately 3 meter long plumb line on a wall.
2) After the plumb line has settled, mark point a1 on the wall
behind the plumb line, near the plumb cone. (see figure 5).
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