BTI MLL 150 Notice D'utilisation page 67

of the beam. It is important to conduct a calibration check using a
distance no shorter than the distance of the applications for which the
tool will be used.
TABLE 3
1. Place the laser on the floor and turn on both vertical beams.
2. Mark the position where the beams cross on the floor (F) and
3. Rotate the laser 180 degrees, and reposition it so the beam
4. Mark the position where the beams cross on the ceiling (H).
5. Measure the distance between the two ceiling marks. If the
CHECKING 90º ACCURACY BETWEEN VERTICAL BEAMS (FIG. 8A–8C)
Checking 90º accuracy requires an open floor area at least 10 m x
5 m (33' x 18'). Refer to the graphic for the position of the MLL 150
at each step and for the location of the marks made at each step.
Always mark the centre of the beams' thickness.
TABLE 4
N565330 crossline laser MLL 150 BTI - Part A - WithGreen.indd 65
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Ceiling
Height
2.5 m (8')
3.0 m (10')
4.0 m (14')
6.0 m (20')
9.0 m (30')
also on the ceiling (G). Always mark the centre of the beams'
thickness.
crossing is exactly on the original mark on the floor.
measurement is greater than the values shown in Table 3, the
laser must be serviced at an authorised service centre.
Distance
from A to B
4.0 m (14')
5.0 m (17')
6.0 m (20')
7.0 m (23')
Allowable Distance
Between Marks
1.5 mm (1/16")
2.0 mm (3/32")
2.5 mm (1/8")
4.0 mm (5/32")
6.0 mm (1/4")
Allowable Distance
Between Marks
3.5 mm (5/32")
4.5 mm (3/16")
5.5 mm (7/32")
6.0 mm (1/4")
ENGLISH
65
10/20/2017 10:20:50 AM