13
I
Horizontal checking
1.
2.
3.
7.
4.
5.
6.
Mark the position of the visible laser dot on the wall (point 2).
Mark the position of the visible laser dot on the wall (point 1)
Switch the unit on ( button 1)
Set the four-point laser on a flat surface, or mount it on a tripod, at a distance
of 50 to 75mm ( 1,96” to 2,95”) from a wall A, with its front sidefacing the wall.
Turn the complete unit 180° without altering the height of the laser.
Two parallel wall surfaces at least 6m ( or 20 ft) apart are required for the
horizontal check.
1
Without changing the height of the laser, rotate it 180° to place the beam near
the mark on the first wall (step 3 / point 1 ).
Measure the vertical distance between the
beam and the mark made in step 3.
The difference may not be greater than:
Measured Value
S
Now move the unit directly in front of wall B
Set the unit's height so that the laser dot's height matches that of point 2.
K
L
8.
M
3,0 mm
6,0 mm
8,0mm
11,0mm
/ 20 ft
/ 40 ft
/ 60 ft
/ 80 ft
6m
12m
18m
24m
1/8 inch
1/4 inch
5/16 inch
7/16 inch
