3) Checking the horizontal laser beams
Select two inner walls (A&B) that are roughly 5 metres apart.
Turn the device in such a way that a horizontal beam and a vertical
beam are visible. Position the device approx. 20 cm from the wall.
Mark the spot on wall A where the horizontal and vertical lines cross
as "P1".
Turn the device 180° in such a way that the laser beams are positioned
at wall B and then mark this point where the beams cross as point "P2".
Position the device at a distance of approx. 20 cm from wall B in such a
way that the centre of the horizontal line is at the same height as "P2".
Use the adjustable legs to set the height of the laser beam exactly to
point "P2".
Turn the device 180° in such a way that the laser beams are positioned
at wall A and then mark this point where the horizontal and vertical
beams cross as point "P3".
GB
Test the horizontal laser beams 2, 3 and 4
as already described.
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