18
2. Checking the Height Accuracy of the cross created by
the longitudinal (#4) and Horizontal lines.
(Up and down deviation)
1) Set up the laser on a table or on the floor between 3 walls
A, B
and
C
. The distance between
A
and
B
should be
approximately 5 meters.
2) Position the laser level approximately 0.5 meters from wall
A
and 2 meters from wall
C
.
3) Unlock the pendulum and press the Beam Selector (a) twice,
to project all 3 lasers beams.
4) Direct the cross lines of the horizontal beam and the forward
vertical beam (#4) towards wall
A
.
5) Repeat the previous marking procedures from paragraph 5 - 16
3. Checking the Accuracy of the forward Vertical beam (#4).
1) Hang an approximately 3 meter long plumb line on a wall.
2) After the plumb line has settled, mark point
a1
on the wall
behind the plumb line, near the plumb cone. (see figure # 5).
