DeWalt DCE822G18 Manual page 18

Checking Accuracy – Horizontal Beam,
GB
Pitch Direction (Fig. E)
Checking the horizontal pitch calibration of the
laser requires a single wall at least 30' (9 m) long.
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.
1. Attach the laser to one end of a wall using its
pivot bracket.
2. Turn on the laser's horizontal beam and pivot
the laser toward the opposite end of the wall and
approximately parallel to the adjacent wall.
3. Mark the center of the beam at two locations (a, b)
at least 30' (9m) apart.
4. Reposition the laser to the opposite end of
the wall.
5. Turn on the laser's horizontal 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 center of
the beam is aligned with the nearest mark (b).
7. Mark the center of the beam (c) directly above or
below the farthest mark (a).
8. Measure the distance between these two marks
(a, c).
• If the measurement is greater than the values
shown below, the laser must be serviced at an
authorized service center.
Distance
Between Walls
10.0 m
12.0 m
15.0 m
18
Allowable Distance
Between and
c
a
6.0 mm
7.2 mm
9.0 mm
Checking Accuracy – Vertical Beam
(Fig. F)
Checking the vertical (plumb) calibration of the
laser can be most accurately done when there is a
substantial amount of vertical height available, ideally
20' (6m), 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.
1. Start by marking a 5' (1.5 m) line on the floor.
2. Turn on the laser's vertical beam and position the
unit at one end of the line, facing the line.
3. Adjust the unit so its beam is aligned and centered
on the line on the floor.
4. Mark the position of the laser beam on the ceiling
(a). Mark the center of the laser beam directly over
the midpoint of the line on the floor.
5. Reposition the laser at the other end of the line on
the floor. Adjust the unit once again so its beam is
aligned and centered on the line on the floor.
6. Mark the position of the laser beam on the ceiling
(b), directly beside the first mark (a).
7. Measure the distance between these two marks.
• If the measurement is greater than the values
shown below, the laser must be serviced at an
authorized service center.
• Ceiling Allowable Distance Between Marks Height
2,5 m.
Distance
Between Walls
2.5 m
3.0 m
4.0 m
6.0 m
Allowable Distance
Between and
a b
1.7 mm
2.1 mm
2.8 mm
4.1 mm