DeWalt DW089LG - Laser Accuracy and Usage; 90° Vertical Beam Accuracy (DW089); Leveling the Laser

17
E
90º Accuracy Between Vertical Beams
(DW089)
Checking 90º accuracy requires an open fl oor area at
least 33’ x 18’ (10m x 5m). Refer to Figure
N
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 beam's thickness.
1.
Place the laser on a smooth, fl at, stable surface
that is level in both directions.
2.
Move the Power/Transport Lock switch to the right
to turn the laser ON.
3.
Press to turn on the side vertical beam.
4.
Mark the center of the beam at three locations
(
a
,
b
,
c
) on the fl oor along the side laser line.
Mark
b
should be at the midpoint of the laser line
(Figure
N 1
).
5.
Pick up and move the laser to
b
.
6.
Press to turn on the front vertical beam too
(Figure
N 2
).
7.
Position the front vertical beam so it crosses
precisely at
b
, with the side beam aligned with
c
(Figure
N 2
).
8.
Mark a location
e
along the front vertical beam at
least 14’ (4m) away from the unit (Figure
N 2
).
9.
Rotate the laser 90º so the side vertical beam now
passes through
b
and
e
(Figure
N 3
).
10.
Directly above or below
a
, mark
f
along the front
vertical beam.
11.
Measure the distance between
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)
Using the Laser
Leveling the Laser
As long as the laser is properly calibrated, the laser is
self-leveling. Each laser is calibrated at the factory to
fi nd level as long as it is positioned on a fl at surface
within average ± 4° of level. No manual adjustments
are required.
If the laser has been tilted so much that it cannot
self-level (> 4°), the laser beam will fl ash. There are
two fl ashing sequences associated with the out of level
condition.
• Between 4° and 10° the beams fl ash with a constant
blink cycle
• At angles greater than 10° the beams fl ash with a
three blink cycle.
When the beams fl ash THE LASER IS NOT LEVEL
(OR PLUMB) AND SHOULD NOT BE USED FOR
DETERMINING OR MARKING LEVEL OR PLUMB.
Try repositioning the laser on a more level surface.