Checking The Calibration - Stabila Laser LAR-250 Mode D'emploi

Checking the calibration

The LAR-250 rotation laser has been designed for building site use and leaves our
factory perfectly calibrated. As with any precision instrument, however, its calibra-
tion must be regularly checked. The unit should be checked before starting any
new tasks, particularly when the unit has been exposed to strong vibrations. After
an impact, the unit should be checked throughout its whole self-leveling range.
Horizontal checking
Please keep as closely as possible to the alignment shown in (H) because this
H
simplifies any re-adjustment that may be required
Set up the rotation laser on a smooth, level surface or on a tripod 25 ft or 50 ft /
1.
5m or 10m from a wall with the front facing the wall.
3
2. Switch the unit on (button 3) and wait for it to level automatically. The laser dot
17
is turned in the direction of the wall (button 17, 18). It is also possible to work
with a receiver.
18
3. Mark the position of the visible laser dot on the wall - Measurement 1 (Point 1).
H1
Because the diameter of the beam depends on the distance, you must always
only use the center of the dot!
4. Turn the complete unit 90° without altering the height of the laser (i.e. the tripod
17 must not be altered). Let the unit level automatically again. Then turn SP2 in the
direction of the wall in the area of measurement point 1.
18
5. Mark the position of the visible laser dot on the wall (Point 2).
H2
H3
6. Repeat steps 4 and 5 to obtain Points 3 and 4.
H4
7. If the difference between the 4 control points is less than 1/16" at 25ft
(1mm at 5m) distance and 1/8" at 50ft (2 mm at 10m) distance the permissible
tolerance of ± 1/8" over 100ft (± 0.1 mm/m) is being maintained.
Points 1 and 3 on the unit's y-axis and points 2 and 4 on the unit's x-axis now
correspond.
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