9-20
Rugby 55
Safety Directions
Class 3R Laser Products used on construction sites and outdoors (surveying,
alignment, leveling):
a) Only qualified and trained persons should be assigned to install, adjust and
operate the laser equipment.
b) Areas in which these lasers are used should be posted with an appropriate
laser warning sign.
c)
Precautions should be taken to ensure that persons do not look directly,
with or without an optical instrument, into the beam.
d) The laser beam should be terminated at the end of its useful path and
should in all cases be terminated if the hazardous beam path extends
beyond the limit (hazard distance *)) of the area in which the presence
and activities of personnel are monitored for reasons of protection from
laser radiation.
e) The laser beam path should be located well above or below eye level wher-
ever practicable.
f)
When not in use the laser product should be stored in a location where
unauthorized personnel cannot gain access.
g) Precautions should be taken to ensure that the laser beam is not inten-
tionally directed at mirror like (specular) surfaces (e.g. mirrors, metal
surfaces, windows). But, more importantly, at flat or concave mirror-like
surfaces.
*) The hazard distance is the distance from the laser at which the beam irra-
diance or radiant exposure equals the maximum permissible value to which
personnel may be exposed without being exposed to a health risk.
