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2. Checking the height accuracy of the cross created
by the front vertical and horizontal lines.
(Up and down deviation)
1) Set up 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) Position the laser level approximately 0.5 meters from
wall A and 2 meters from wall C.
3) Turn on the laser in Automatic mode to project all 3 lasers
beams.
4) Direct the cross lines of the horizontal beam and the front
vertical beam towards wall A.
5) Repeat the previous marking procedures from steps 5-15
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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