Download manual

EN
ACCURACY CONTROL
Horizontal levelling control
1. Choose a room ±10 m long
2. Place the instrument next to wall no. 1.
3. Turn on the instrument and allow it to level itself.
4. Mark the horizontal line in the middle of the cross on wall no 1.
5. Turn the instrument through 180° and mark the laser beam in the middle of the cross on wall no. 2.
6. Bring the instrument as close as possible to wall No. 2.
7. Adjust the height of the laser such that the laser cross is centred on the marker on wall No. 2.
8. Then rotate the instrument through 180° and note the difference between the centre of the laser cross
and the marker on wall no. 1.
9. This difference should not exceed 2 mm.
10. NB: The tolerance depends on the distance between the walls for which the monitoring test has
been carried out. This distance should be multiplied by 2. Hence, if the instrument has an accuracy
of 2 mm / 10 m, then in our example the calculation is 10 m distance x 2 = 20 m. The tolerance is
4 mm / 20 m.
13