DeWalt DCE822G18 Manual page 19

Plumb Dot Accuracy
Checking the plumb calibration of the laser can be
most accurately done when there is a substantial
amount of vertical height available, ideally 20' (6 m),
with one person on the floor positioning the laser and
another person near a ceiling to mark the dot created
by the beam on the ceiling.
• Mark point (a) on the floor, as shown in Figure
.
G 1
• Turn the laser ON and press
dots above and below the laser.
• Place the laser so that the down dot is centered
over point (a) and mark the center of the up dot on
the ceiling as point (b) (Figure
• Turn the laser 180°, making sure that the down dot
is still centered on point (a) on the floor
(Figure ).
G 2
• Mark the center of the up dot on the ceiling as
point (c) (Figure ).
G 2
• Measure the distance between points (b) and (c).
• If your measurement is greater than the Allowable
Distance Between (b) & (c) for the corresponding
Distance Between Ceiling & Floor in the following
table, the laser must be serviced at an authorized
service center.
Distance Between
Ceiling & Floor
2.5 m
3.0 m
4.0 m
6.0 m
Level Dot Accuracy - Level
Checking the level calibration of the laser unit requires
two parallel walls at least 20' (6 m) apart.
• Turn the laser ON and press twice to display dots
• Place the laser 2"–3" (5–8 cm) from the first wall. To
once to display
• Mark the laser dot position on the first wall as point
• Turn the laser 180˚ and mark the laser dot position
).
G 1
• Place the laser 2"–3" (5–8 cm) from the second
• Turn the laser 180˚ and aim the laser dot near
• Measure the vertical distance between points (a)
• If your measurement is greater than the Allowable
Allowable Distance
Between &
b c
1.7 mm
2.1 mm
• Repeat steps 2 through 8 to check the accuracy of
2.8 mm
4.1 mm
above, ahead, below, and to the right and left of
the laser.
test the front laser dot, make sure the front of the
laser is facing the wall (Figure H #1).
(a) (Figure H #1).
on the second wall as point (b) (Figure H #1).
wall. To test the front laser dot, make sure the front
of the laser is facing the wall (Figure H #2), and
adjust the height of the laser until the laser dot hits
point b.
point (a) on the first wall, and mark point (c) (Figure
H #2).
and (c) on the first wall.
Distance Between (a) & (c) for the corresponding
Distance Between Walls in the following table,
the laser must be serviced at an authorized
service center.
the right dot and then the left dot, making sure that
the laser dot you are testing is the laser dot facing
each wall.
Distance Allowable Distance
Between Walls Between
6.0 m
9.0 m
15.0 m
GB
&
a c
4.1 mm
6.2 mm
10.2 mm
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