LAR 350
27
en
1
3
Checking the horizontal laser line level
Be sure to adhere as closely as possible to the orientation
of the unit as shown.
Place the LAR 350 on a horizontal surface or on a tripod at
a distance of 5 or 10 m from a wall, with the operator panel
towards the wall.
Switch the laser unit on (button 3) and wait until it has
automatically levelled itself.
Mark the centre of the visible laser line on the wall -
measurement 1 (point 1). A receiver can also be used.
Rotate the entire laser unit through 90° without altering
the height of the laser (i.e. do not change the tripod height).
Allow the unit to level itself again.
Mark the centre of the laser line on the wall (point 2).
Repeat steps 4 and 5 twice to obtain points 3 and 4.
If the differences between the four control points are less
than 1 mm for a distance of 5 m (1/16” at 25 ft) or less than
2 mm for a distance of 10 m (1/8” at 50 ft), the unit is within
its permitted tolerance of ± 0.1 mm/m (± 18” over 100ft).
Here points 1 and 3 correspond to the device's x-axis and
points 2 and 4 to its y-axis.
22.2 Horizontal Check
2
1
2
5 m / 25 ft
10 m / 50 ft
1
X
1
X
Y
2
Y
1
3
2
1
X
X
1x
(3)
4
3
1
2
25 ft
≤ 1/16”
50 ft
≤ 1/8”
Maximum permissible
difference:
Y
Y
4
3
2
1
10 m
≤ 2 mm
5 m
≤ 1 mm
