18
2. Checking the Height Accuracy of the cross created by
the forward vertical 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) Turn the device
ON
and choose both verticals and bottom
horizontal laser beams to be projected.
4) Direct the cross lines of the horizontal beam and the forward
vertical beam towards wall
A
.
5) Repeat the previous marking procedures from paragraph 5 – 14
6) Mark the dots only with laser beams leveled - leveling
indicator (e) not blinking. Repeat the procedure for upper
horizontal beam.
3. Checking the Accuracy of the forward Vertical beam
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).
