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CHECKING ACCURACY – VERTICAL BEAMS (FIG. 7A, 7B)
Checking the vertical (plumb) calibration of the laser can be most
accurately done when there is a substantial amount of vertical height
available, ideally 9 m (30'), with one person on the floor positioning
the laser and another person near a ceiling to mark the position 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
Ceiling
Allowable Distance
Height
Between Marks
2.5 m (8')
1.5 mm (1/16")
3.0 m (10')
2.0 mm (3/32")
4.0 m (14')
2.5 mm (1/8")
6.0 m (20')
4.0 mm (5/32")
9.0 m (30')
6.0 mm (1/4")
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 beam's thickness.
DW089K-XJ_DW89CG-XJ User Manual - EU - FEB 2019 - Part A.indd 65
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