DeWalt DW088 Guide D'utilisation page 9

Distance Between Walls
Checking Accuracy – Vertical Beam (Fig. H)
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 floor 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. Start by marking a 5' (1.5 m) line on the floor.
2. Turn on the laser's vertical beam and position the unit at one end of the line, facing the line.
3. Adjust the unit so its beam is aligned and centered on the line on the floor.
4. Mark the position of the laser beam on the ceiling (f). Mark the center of the laser beam directly over the midpoint of the line on
the floor.
Fig. H
STEP 7
g
f
5. Reposition the laser at the other end of the line on the floor. Adjust the unit once again so its beam is aligned and centered on
the line on the floor.
6. Mark the position of the laser beam on the ceiling (g), directly beside the first mark (f).
7. Measure the distance between these two marks.
8. If the measurement is greater than the values shown below, the laser must be serviced at an authorized service center.
30' (9 m)
40' (12 m)
50' (15 m)
STEPS 2, 3
Ceiling Allowable Distance
8' (2.5 m)
10' (3.0 m)
14' (4.0 m)
20' (6.0 m)
30' (9.0 m)
Allowable Distance Between Marks
1/4" (6.0 mm)
5/16" (8.0 mm)
13/32" (10.0 mm)
STEP 6
g
f
STEP 4
5' (1.5 m)
STEP 1
Between Marks Height
5/32 (3,5 mm)
3/16 (4,5 mm)
1/4 (6,0 mm)
3/8 (9,0 mm)
1/2 (13 mm)
7
ENGLISH
STEP 5