DeWalt LaserChalkLine DW088CG Instruction Manual page 9

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 20' (6 m), 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 (a). Mark the center of the
laser beam directly over the midpoint of the line on the floor.
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 (b), directly beside the first
mark (a).
7. Measure the distance between these two marks.
• If the measurement is greater than the values shown below, the laser must be
serviced at an authorized service center.
Fig. H
STEP 7
b
a
Troubleshooting
The Laser Does Not Turn On
• Make sure batteries are installed according to (+) and (–) on the inside of the battery door.
• Make sure the batteries are in proper working condition. If in doubt, try installing new batteries.
• Make sure that the battery contacts are clean and free of rust or corrosion. Be sure to keep the laser level dry and use only new,
high-quality, name brand batteries to reduce the chance of battery leakage.
• If the laser unit is heated above 120 ˚F (50 ˚C), the unit will not turn on. If the laser has been stored in extremely hot
temperatures, allow it to cool. The laser level will not be damaged by pressing the on/off button before cooling to its proper
operating temperature.
STEP 4
STEPS 2, 3
Between Walls
Between Walls
STEP 6
b
a
STEP 1
7
Distance Allowable Distance
Between
8'
10' 3/16"
14'
20'
Distance Allowable Distance
Between
2.5 m 3.4 mm
3.0 m 4.2 mm
4.0 m 5.5 mm
6.0 m 8.2 mm
STEP 5
ENGLISH
and
a b
1/8"
1/4"
3/8"
and
a b