Kapro 884G Prolaser 4D XTRA Manual Del Usuario página 19

3) Set up the laser on a tripod or on a solid surface in front of the
wall, at a distance of approximately 2 meters.
4) Turn the device ON and choose to project the vertical forward
beam towards the plumb line.
5) Turn the laser, so the vertical beam will merge with the
plumb line below the hanging point.
6) Mark point a2 on the wall, in the middle of the vertical beam
at the same height as a1. (see figure # 6).
a1
Figure # 5
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