10
GB
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 25’ (7.5 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
.
1.
Mark
point P1 on the floor (Figure
I
#1).
2.
Turn the laser ON and press
4 times to display dots
above, ahead, below, and to the right and left of the laser.
3.
Place the laser so that the down dot is centered over point
P1 and mark the center of the up dot on the ceiling as point
P2 (Figure
I
#1).
4.
Turn the
laser 180°, making sure that the down dot is still
centered on point P1 on the floor (Figure
I
#2).
5.
Mark
the center of the up dot on the ceiling as point P3
(Figure
I
#2).
6.
Measure the distance between points P2 and P3.
7.
If your measurement is greater than the
Allowable
Distance Between P2 & P3
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 P2 & P3
4.5 m (15
′
)
3 mm (1/8
”
)
6 m (20
′
)
4.2 mm (5/32
”
)
9 m (30
′
)
6 mm (1/4
”
)
12 m (40
′
)
8.4 mm (5/16
”
)
Level Dot Accuracy - Level
Checking the level calibration of the laser unit requires two
parallel walls at least 20’ (6 m) apart
.
1.
Turn the laser ON and press
4 times to display dots
above, ahead, below, and to the right and left of the laser.
2.
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).
3.
Mark the laser dot position on the first wall as point P1
(Figure
H
#1).
4.
Turn the laser 180° and mark the laser dot position on the
second wall as point P2 (Figure
H
#1).
5.
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 P2.
6.
Turn the laser 180° and
aim the laser dot near point P1 on
the first wall, and mark point P3
(Figure
H
#2).
7.
Measure the vertical distance between points P1 and P3 on
the first wall.
8.
If your measurement is greater than the
Allowable
Distance Between P1 & P3
for the corresponding
Distance Between Walls
in the following table, the laser
must be serviced at an authorized service center.
Distance Between
Walls
Allowable Distance
Between P1 & P3
6.0 m (20
′
)
3.6 mm (9/64”)
9.0 m (30
′
)
5.4 mm (7/32”)
15.0 m (50
′
)
9 mm (11/32”)
23.0 m (75
′
)
13.8 mm (9/16”)
9.
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.
Level Dot Accuracy - Square
Checking the squareness of the laser beams requires
a room
at least 35’ (10 m) long
.
All marks can be made on the floor
by placing a target in front of the level or square beam and
transferring the location to the floor.
NOTE
:
To ensure accuracy, the distance (D1) from P1 to P2, P2
to P3, P2 to P4, and P2 to P5 should be equal.
1.
Mark
point P1 on the floor at one end of the room, as
shown in Figure
J
#1.
2.
Turn the
laser ON and press 4 times to display dots
above, ahead, below, and to the right and left of the laser
.
3.
Place the laser so that the down dot is centered over point
P1 and make sure the front dot points toward the far end of
the room (Figure
J
#1).
