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CHECKING THE HEIGHT ACCURACY OF THE HORIZONTAL PLANE (UP AND DOWN DEVIATION)
1. Set up the laser on a tripod or on a flat surface
between two walls A and B, approximately 5 meters apart.
2. Position the laser level approximately 0.5 meter from wall A.
3. Switch ON the self-leveling mode and press the button to project the horizontal and the
vertical planes towards wall A.
4. Mark the center of the cross planes on the wall as a1.
Turn the laser 180° towards wall B and mark the center of the cross planes as b1 on the
wall.
ENGLISH
5. Move the laser level towards wall B and position it approximately 0.5 meter from wall B.
6. Mark on wall B the center of the cross planes as b2.
7. Turn the laser 180° towards wall A, and mark on the wall the center of the cross planes
as a2.
8. Measure the distances:
Δa= |a2-a1|
Δb= |b1-b2|
9. The difference | Δa – Δb| should be no more than 2 mm.
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