DNIPRO M ML-330R Safety And Operation Manual page 32

On the area of 2 × 5 m = 10 m, the maximum
admitted deviation makes:
10 m × ±0.3 mm/m = ±3 mm. Thus, the d
difference between points I and III may be
equal to a maximum of 3 mm.
Checking the accuracy of self-aligning a
horizontal beam
To do this, there should be a free measuring
area of 5×5 m on solid ground between two
walls A and B.
Set the laser level between the walls A and B on
a mount, tripod, or place it on a solid, smooth
surface. Activate the laser level to operate the
automatic aligning, then select the horizontal
operation mode. Allow the measuring tool to
self-align.
Mark the middle of the laser line on both walls
at a distance of 2.5 m from the laser level (point
I on the wall A and point II on the wall B) (Fig. 9).
Set the laser level rotated 180° at a distance of
5 m and allow it to self-align.
Align the laser level heightwise in such a way
(using a tripod or placing something beneath)
that the middle of the laser line accurately hits the
previously marked point II on the wall B (Fig. 10).
On the wall A mark the middle of the laser line
as a point III (Fig. 9) (vertically above the point
I or beneath).
The d difference between the two points I
and III marked on the wall A - that is the actual
deviation of the laser level horizontally (Fig. 10).
On the area of 2 × 5 m = 10 m, the maximum
admitted deviation makes:10 m × ±0.3 mm/m =
±3 mm.Thus, the d difference between points
I and III may be equal to a maximum of 3 mm.
Checking the accuracy of the vertical beam
To do this there should be a door clearance
having a minimum of 2.5 meters on either side
of the door (on solid ground).
1. Set the laser level 2.5 meters away from
the door clearance on a solid, smooth surface
(avoid using a tripod). Activate the laser level
in automatic self-aligning mode. Select the
mode of operation in which the vertical laser
plane is emitted in front of the laser level.
2. Mark the middle of a vertical laser line on the
floor in the door clearance (point I), 5 meters
away from the laser level, on the other side of
the door clearance (point II), as well as from
the upper edge of the door clearance (point
III) (Fig. 11).
3. Turn the laser level 180° and place it on
the other side of the door clearance directly
behind the point II. Wait until the beam is
32
automatically aligned, then point the vertical
laser line so that its middle passes exactly
through the point I and II.
4. Mark the middle of the laser line on the
upper edge of the door clearance as a point
IV (Fig. 12).
5. The d difference between the two marked
points III and IV - that is the actual deviation of
the laser level vertically.
6. Measure the height of the door clearance.
Calculate the maximum admitted deviation as
follows: double height of the door clearance ×
0.3 mm/m. Example: should the door clearance
height be 2 meters, the maximum deviation
would be 2 × 2 m × ±0.3 mm/m = ±1.2 mm.
Thus, the points III and IV must be located at a
maximum distance of 1.2 mm from each other.
90° accuracy check between the
vertical beams
To check the 90° accuracy there should be an
area on a smooth surface with a size of at least
10 m × 5 m. Be sure to mark the center of the
laser beam thickness.
1. Place the laser level in one of the corners on
the floor and activate the side vertical beam.
2. Mark the middle of the beam at three points
(A, B, C) along the laser line projected on the
floor. Mark B should be located precisely in the
middle of the laser line (Fig. 13).
3. Move the laser level to the mark B and
activate both vertical beams.
4. The pendulum point should point precisely
to the mark B, but the side laser beam should
be aligned with the mark C.
5. At least 5 m away from the laser level, be
sure to mark a point D on the line projected by
the front vertical beam (Fig. 14).
6. Rotate the laser 90° at the mark B so that
the side vertical laser beam passes through the
marks B and D (Fig. 15).
7. Mark a point Eon the line projected by front
vertical beam, as shown on Fig. 16.
8. Measure the distance between marks A
and E. Unless the distance exceeds the below
values, then the laser level must be adjusted at
the corporate service center of Dnipro M.
Distance from mark
A to B
4 m
5 m
6 m
7 m
Admitted distance
between the marks
3.5 m
4.5 m
5.5 m
6 m