Kapro Prolaser 3D All-Lines 883G Manuel D'utilisation page 18

2. Checking the Height Accuracy of the cross created by
the longitudinal (#4) and the 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) Unlock the pendulum and press the Beam Selector (a), twice
to project all 3 lasers beams.
4) Direct the cross lines of the horizontal beam and the forward
vertical beam (#4) towards wall A.
5) Repeat the previous marking procedures from paragraph 5 - 16
3. Checking the Accuracy of the forward Vertical beam (#4).
1) Hang approximately 3 meter 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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