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Prevention:
Do not stare at the laser beam, or point the laser beam to others’ eyes. Reflected laser beam is a valid
measurement to the instrument.
Warning:
When the laser beam is shooting at prism, mirror, metal surface or window, the reflector laser beam is also
harmful to eyes.
Prevention:
Do not stare at the locations with laser reflection. When the reflectorless function is enabled for EDM, do not
stare beside the laser beam or prism. Collimating the prism via the telescope unit is requested only.
Warning:
Incorrect application of Class 3R laser equipment is very dangerous.
Prevention:
To avoid being hurt, you must pay particular attention to the precaution measures and keep it under control
within the distance of possible danger according to standard IEC60825-1:2001.
The following explain the key sections of the Standard:
Laser instrument of Class 3R is applicable outdoors and in construction field (measurement, defining lines,
leveling).
a) Only those persons who are trained with related course and authenticated are allowed to install, adjust, and
operate this kind of laser instrument.
b) Relevant laser warning symbols should be easily identified within the operating range.
c) Prevent any person to look straight at or use optical instrument to observe the laser beam.
d) To prevent the harm caused by laser, block the laser beam at the end of the working route. When the laser beam
exceeds the limit area (harmful distance*) and when there are motivating persons, stopping the laser beam is a
must.
e) The optical path of the laser should be set higher or lower than the line of sight.
f) When the laser instrument is not in use, take care of it properly. The person who is not authenticated is not
allowed to use.
g) Prevent the laser beam from irradiating plane mirror, metal surface, window, etc., especially beware of the
surface of plane mirror and concave mirror.
* Harmful distance means the maximum distance between the start point and the point which the laser is
weakened to a degree that doesn’t harm people.
* The harmful distance of built-in laser unit is 1000m (3300ft). When the operation is beyond this range and laser
beam is weakened to Class 1R, direct staring at laser beam is less harmful.
