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  5. Measure the vertical distance between the lowest mark (A) and 
the highest mark (B). If the measurement is greater than the values 
shown in Table 1, the laser must be serviced at an authorised 
service centre.
CHECKING ACCURACY – HORIZONTAL BEAM, PITCH DIRECTION (FIG. 6)
Checking the horizontal pitch calibration of the laser requires asingle 
wall at least 9 m (30') long. It is important to conduct acalibration 
check using adistance no shorter than the distance of the applications 
for which the tool will be used.
  TABLE 2 
  Distance   Allowable Distance  
  Between Walls  Between Marks
  9.0 m (30')  6.0 mm (1/4")
  12.0 m (40')  8.0 mm (5/16")
  15.0 m (50')  10.0 mm (13/32")
  1. Attach the laser to one end of awall using its pivot bracket.
  2. Turn on the laser’shorizontal beam and pivot the laser toward the 
opposite end of the wall and approximately parallel to the adjacent 
wall.
  3. Mark the centre of the beam at two locations (C, D) at least 9 m 
(30') apart.
  4. Reposition the laser to the opposite end of the wall.
  5. Turn on the laser’shorizontal beam and pivot the laser back 
toward the first end of the wall and approximately parallel to the 
adjacent wall.
  6. Adjust the height of the laser so that the centre of the beam is 
aligned with the nearest mark (D).
  7. Mark the centre of the beam (E) directly above or below the 
farthest mark (C).
  8. Measure the distance between these two marks (C, E). If the 
measurement is greater than the values shown in Table 2, the laser 
must be serviced at an authorised service centre.
DW089_DW089CG - User Manual - NA - May 2018.indd   19 5/25/2018   10:40:48 AM