LEICA TPS1200 - Manual (Page 145)

Safety Directions TPS1200 145
d) The laser beam should be terminated at the end of its useful beam 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 wherever
practicable.
f) When not in use the Laser Product should be stored in a location where unau-
thorized personnel cannot gain access.
g) Precautions should be taken to ensure that the laser beam is not unintentionally
directed at mirror-like, specular surfaces for example mirrors, metal surfaces or
windows. But, more importantly, at flat or concave mirror-like surfaces.
*) The hazard distance is the distance from the laser at which beam irradiance or
radiant exposure equals the maximum permissible value to which personnel
may be exposed without being exposed to a health risk.
Products with an integrated distancer of laser class 3R this hazard distance is
68 m / 224 ft. At this distance, the laser beam rates as Class 1M, that means direct
intrabeam viewing is not hazardous.