DeWalt DCLE34220 Instructions Manual page 20

Plumb Dot Accuracy
E
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
• Turn the laser ON and press
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
• 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
8'
10'
14'
20'
Distance Between
Ceiling & Floor
2.5 m
3.0 m
4.0 m
6.0 m
20
G 1
once to display dots
).
G 1
G 2
).
Allowable Distance
Between &
c
b
1/16"
3/32"
1/8"
3/16"
Allowable Distance
Between &
c
b
1.7 mm
2.1 mm
2.8 mm
4.1 mm
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
above, ahead, below, and to the right and left of the
laser.
• Place the laser 2"–3" (5–8 cm) from the first wall. To
.
test the front laser dot, make sure the front of the
laser is facing the wall (Figure H #1).
• Mark the laser dot position on the first wall as point
(a) (Figure H #1).
• Turn the laser 180˚ and mark the laser dot position
on the second wall as point (b) (Figure H #1).
• Place the laser 2"–3" (5–8 cm) from the second 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.
• Turn the laser 180˚ and aim the laser dot near
point (a) on the first wall, and mark point (c)
(Figure H #2).
• Measure the vertical distance between points (a)
and (c) on the first wall.
• If your measurement is greater than the Allowable
Distance Between (a) & (c) for the corresponding
Distance Between Walls in the following table,
the laser must be serviced at an authorized
service center.
• Repeat steps 2 through 8 to check the accuracy of
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
Between Walls
20'
30'
50'
Allowable Distance
Between &
a c
3/16"
1/4"
7/16"