DeWalt DW089 User Manual page 22

DW 089/ D W089CG
CHECKING ACCURACY – VERTICAL BEAMS (FIG. 7A, 7B)
E
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
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
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 DW089 at each
step and for the location of the marks made at each step. Always mark
the centre of the beam's thickness.
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DW089_DW089CG - User Manual - NA - May 2018.indd 20
Ceiling
Height
2.5 m (8')
3.0 m (10')
4.0 m (14')
6.0 m (20')
9.0 m (30')
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.
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")
5/25/2018 10:40:48 AM