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21
E
• Turn the laser ON and press once to display 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
G
1
).
• Turn the laser 180°, making sure that the down dot is
still centered on point (a) on the oor (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
Allowable Distance
Between
b
&
c
8′ 1/16"
10′ 3/32"
14′ 1/8"
20′ 3/16"
Distance Between
Ceiling & Floor
Allowable Distance
Between
b
&
c
2.5 m 1.7 mm
3.0 m 2.1 mm
4.0 m 2.8 mm
6.0 m 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 rst 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 rst 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 rst wall, and mark point (c)
(Figure H #2).
• Measure the vertical distance between points (a)
and (c) on the rst 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
Allowable Distance
Between
a
&
c
20' 3/16"
30' 1/4"
50' 7/16"
Distance
Between Walls
Allowable Distance
Between
a
&
c
6.0 m 4.1 mm
9.0 m 6.2 mm
15.0 m 10.2 mm
Level Dot Accuracy - Square
Checking the level calibration of the laser unit requires
a room at least 20' (6 m) long. All marks can be made
on the oor by placing a target in front of the level or
square beam and transferring the location to the oor.
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