Pacific Laser Systems PLS3 Manual De Instrucciones página 14

Checking Calibration
METHOD 3 (both PLS
and PLS ) Exact Check of Plumb
5 3
Accuracy. This requires significant vertical height (mini-
MARK
mum 10'-0") and the ability to mark at that height. Place
the unit with the #2 down beam exactly centered on both
axes over a cross mark. See Fig. 10. At the surface
above, mark both axes of #3 up beam. Rotate the laser
180° and place the #2 down beam exactly centered on the
same mark. The #3 up beam should be exactly over the
first mark.
If there is a difference between mark #1 and mark #2,
DISTANCE
the error of the plumb beam is one half that difference.
FIG. 10
11