Checking 90 Degree Accuracy Between Vertical Beams - DeWalt DW089 Original Instruction

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 also
on the ceiling (G). Always mark the centre of the beams' thickness.
3. Rotate the laser 180 degrees, and reposition it so the beam
crossing is exactly on the original mark on the floor.
4. Mark the position where the beams cross on the ceiling (H).
5. Measure the distance between the two ceiling marks. If the
measurement is greater than the values shown in Table 3, the laser
must be serviced at an authorised service centre.
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 DW089 at each
step and for the location of the marks made at each step. Always mark
the centre of the beams' thickness.
TABLE 4
Ceiling
Height
2.5 m (8')
3.0 m (10')
4.0 m (14')
6.0 m (20')
9.0 m (30')
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")
ENG LI S H
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