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11
EN
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 (Figure
8
#2).
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
and
c
. If the measurement is greater than the values
shown below, the laser must be serviced at an authorized
service center.
Distance Between Walls Allowable Distance
Between
a
and
c
30’ (9m) 1/4” (6.0mm)
40’ (12m) 5/16” (8.0mm)
50’ (15m) 13/32” (10.0mm)
Checking Accuracy –
Vertical Beam (See Figure
9
)
Checking the vertical (plumb) calibration of the laser can be most
accurately done when there is a substantial amount of vertical height
available, ideally 30’ (9m), with one person on the oor 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. Place the laser on a smooth, flat, stable surface that is level in
both directions. Turn on both vertical beams (Figure
9
#1).
2. Mark two short lines where the beams cross
a
,
b
and also
on the ceiling
c
,
d
. Always mark the center of the beams’
thickness (Figure
9
#2).
3. Pick up and rotate the laser 180 degrees, and position it so the
beams line up with the marked lines on the level surface
(
e
,
f
) (Figure
8
#3).
4. Mark two short lines where the beams cross on the
ceiling
g
,
h
.
5. Measure the distance between each set of marked lines on the
ceiling (
c
,
g
and
d
,
h
). If the measurement is greater
than the values shown below, the laser must be serviced at an
authorized service center.
Ceiling Height
Allowable Distance
Between Marks
8’ (2.5m) 1/16” (1.5mm)
10’ (3m) 3/32” (2.0mm)
14’ (4m) 1/8” (2.5mm)
20’ (6m) 5/32’ (4mm)
30’ (9m) 1/4’ (6mm)
Checking 90º Accuracy Between Vertical Beams (DW089LR/G)
(See Figure
10
)
Checking 90º accuracy requires an open oor area at least 33’ x 18’
(10m x 5m). Refer to Figure 9 for the position of the laser at each step
and for the location of the marks made at each step. Always mark the
center of the beams’ thickness.
1. Place the laser on a smooth, flat, stable surface that is level in both
directions. Turn on the side vertical beam.
2. Mark the center of the beam at three locations
(
a
,
b
,
c
)on the floor along the side laser line. Mark
b
should
be at the midpoint of the laser line (Figure
10
#1).
3. Move the laser to mark
b
and turn on both vertical beams (Figure
10
#2).
4. Position the beam crossing precisely at mark
b
, with the side
beam aligned with mark
c
.
5. Mark a location
e
along the front vertical beam at least 5m (18’)
away from the unit.
6. Rotate the laser cross over mark
b
so that the vertical beam now
passes through mark
b
and
e
(Figure
10
#3).
7. Mark the location
f
where the side vertical beam passes by
mark
e
.
8. Measure the distance between marks
a
and
f
. If the
measurement is greater than the values shown below, the laser
must be serviced at an authorized service center.
Distance from
a
to
b
Allowable Distance
Between
a
and
f
14’ (4m) 5/32” (3.5mm)
17’ (5m) 3/16” (4.5mm)
20’ (6m) 7/32” (5.5mm)
23’ (7m) 1/4” (6mm)
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