5
180
A
B
5. Move the tool within 1' of wall B. Allow the laser
to self level. Align the laser cross in the general
direction of point II on wall B.
A
B
1'
6. Adjust the height of the tool (using the tripod or
by adding shims, if required) to align the laser
cross directly onto point II on wall B. Allow the
tool to self-level.
7.
Rotate the tool 180° without changing the height,
allow it to self-level, and mark the center of the
laser cross on wall A (point III). Point III should
be aligned as vertically above or below point I on
wall A as possible.
B
180
A
d
B
8.
The distance between points I and III on wall A is
the height deviation (d) of the tool. This distance
should not exceed 1/8" (max.) at 33' (1/2" at 132').
For the Measuring distance of 2 x 66' = 132', the
maximum allowable deviation (d) is: 132' x ±1/8"
÷ 33' = ±1/2".
Horizontal Leveling Accuracy
A free measuring space of approximately 33'x33' on
a firm surface between two walls or structures A and
B is required for the check.
It is also suggested to mount the Laser Level to a
Tripod for easy adjustment.
Securely mount the tool on one side of the room and
centered between walls A and B. Direct the laser
lines toward the other side of the room such that the
horizontal line appears on both walls A and B. Allow
the laser to Self-Level.
1.
Turn the tool to
ON and to Horizontal Level Line
mode and Horizontal Points mode.
A
B
33'
16.5'
2.
Mark the center of the plumb point on the wall
(point I). Also, mark the center of the plumb point
on the opposite wall (point II).
3. Rotate the tool 180°. Align the center point of the
laser beam directly onto the wall point II.
4.
Mark the center point of the laser beam on wall
A (point III).
5.
The distance d between marked points I and III on
wall A indicates the actual deviation (d) of the tool.
A
B
d
33'
16.5'
6.
For the Measuring distance of 2 x 33' = 66', the
maximum allowable deviation (d) is: 66' x ±1/8" ÷
33' = ±1/4". Thus, the difference d between points
I and III should not exceed 1/4" (max.) at 66'.
