Checking calibration
The automatic spot and line laser LA-P+L is designed for on-site use and left our
company in perfectly adjusted condition. As with any precision instrument, how-
ever, it is necessary to check calibration at regular intervals. Each time before
starting work, particularly if the unit has been exposed to vibrations, you should
check the calibration.
If the unit has been subjected to impacts, you should check the calibration over
the entire self-levelling range.
a) Checking spot calibration
The accuracy of the system is 3 mm over 10 metres or 0.3 mm/metre in the
self-levelling range of +5°.
Set up the unit in a room directly in front of a wall with the spot exit aper-
ture pointing towards wall A. (Ensure that the bubble of the transverse vial
does not contact the edge.) Mark the centre of the laser spot on wall A
(point (1)).
Rotate the unit by 180° and mark the centre of the laser spot on wall B
(point (2)).
Set up the unit in front of the opposite wall B with the spot exit aperture
pointing towards wall B. Align the laser so that the centre of the laser spot
exactly coincides with point (2).
Rotate the unit on the base surface by 180° and mark the new point (3) on
wall A.
If the two walls A and B are 10 metres apart, the distance between points
(1) and (3) must not exceed 6 mm 2 x 3 mm / 10 metres. If the distance
is greater than this, the unit can be adjusted as described below.
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