Craftsman CMHT77629, User Manual

12

E

3.

Turn the laser 45º counter-clockwise so that the 
right-most end of the laser line is displayed on the 
wall (Figure 

D

1

).

4.

Mark 

a

 on the center of the beam on the wall.

5.

Turn the laser 90º clockwise so that the left-most 
end of the laser line is displayed near 

a

 (Figure 

D

2

).

6.

Mark 

b

 on the center of the beam on the wall.

7.

Measure the vertical distance between 

a

 and 

b

.

8.

If your measurement is greater than the Allowable 
Distance Between 

a

 and 

b

 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 

a

 and 

b

30

′

 (9m)

7/16

″

 (11.0mm)

40

′

 (12m)

9/16

″

 (14.4mm)

50

′

 (15m)

23/32

″

 (18.0mm)

Horizontal Beam - Pitch Direction

Checking the horizontal pitch calibration of the 
laser requires a single wall at least 30

′

 (9m) long. 

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 against the end of the wall (Figure 

E

1

).

2.

Move the Power/Transport Lock switch to the right 
(Figure 

A

3

) to turn the laser ON in self-leveling 

mode and display the horizontal and vertical beams. 

3.

At least 30

′

(9m) apart along the laser beam, mark 

a

 and 

b

.

4.

Move the laser to the opposite end of the wall 
(Figure 

E

2

).

5.

Position the laser toward the first end of the same 
wall and parallel to the adjacent wall.

6.

Adjust the height of the laser so the center of the 
beam is aligned with 

b

.

7.

Directly above or below 

a

, mark 

c

 along the laser 

beam (Figure 

E

3

).

8.

Measure the distance between 

a

 and 

c

.

9.

If your measurement is greater than the Allowable 
Distance Between 

a

 and 

c

 for the corresponding 

Distance Between 

a

 and 

b

 in the following table, 

the laser must be serviced at an authorized service 

center.

Distance Between 

a

 and 

b

Allowable Distance 

Between 

a

 and 

c

30

′

 (9m)

7/16

″

 (11.0mm)

40

′

 (12m)

9/16

″

 (14.4mm)

50

′

 (15m)

23/32

″

 (18.0mm)

Vertical Beam - Plumb

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.

On the floor between two walls, mark a 5 ft. (1.5 m) 
line that is parallel to the adjacent wall (Figure 

F

1

).

2.

Move the Power/Transport Lock switch to the right 
(Figure 

A

3

) to turn the laser ON in self-leveling 

mode and display the horizontal and vertical beams.

3.

Place the laser at one end of the line on the floor, 
making sure the vertical laser beam is aligned and 
centered on the line.

4.

Where the vertical laser beam appears on the 
ceiling, mark 

a

. (This should be directly over the 

midpoint of the line on the floor.)