13
P
a1
b
a2
b
a1
180°
5
This procedure requires a room
of with approx. 5m distance
between
fl
oor and ceiling.
1.
Open the folding legs of the
laser and place it on the
fl
oor.
2. Switch ON the self-leveling
mode and press the push
button to project the vertical
cross beams on the ceiling
and the plum down on the
fl
oor.
3. Mark the center of the upper
cross beam on the ceiling as
point a1 (see the illustration).
4. Mark the center of the plumb
dot on the
fl
oor as point b.
5.
Rotate the laser level 180°,
position it so that the center of
the plumb dot is on the point
b, which has already been
marked, and allow it to level.
6.
Mark the center of the upper
cross beam on the ceiling as
point a2.
7. The distance between points
a1 and a2 marked on the
ceiling is an indication of the
actual deviation of the laser
level from the ideal plumb line.
If the measuring distance is
5m, the maximum permissible
deviation is:
5m x (+/- 0.6mm/m) x 2 = +/ - 6mm.
8. The distance between a1 and
a2, should not be more than
6 mm.
ENGLISH
CHECKING PLUMB ACCURACY
