LaserLiner CompactPlane-Laser 3D Mode D'emploi page 14

Checking the vertical line
Position the device about 5 m from a wall. Fix a plumb bob with a line of
2.5 m length on the wall, making sure that the bob can swing freely. Switch
on the device and align the vertical laser to the plumb line. The precision is
within the specified tolerance if the deviation between the laser line and
the plumb line is not greater than ± 1.75 mm.
Checking the horizontal line
Position the device about 5 m from a wall and
switch on the cross laser. Mark point B on the
wall. Turn the laser cross approx. 2.5 m to the
right and mark point C. Check whether the
horizontal line from point C is level with point B
to within ± 1.75 mm. Repeat the process by turning
the laser to the left.
!
Regularly check the calibration before use, after transport and after
extended periods of storage.
14
GB
2.5 m
B
C