CHC CTS-112R4 user manual 7
3. Safety guide
WARNING
The total station is equipped with an EDM of a laser grade of 3R/a. It is verified by the
following labels. On the vertical tangent screw sticks an indication label “CLASS III LASER
PRODUCT”. A similar label is stick on the opposite side. This product is classified as Class 3R
laser product, which accords to the following standards. IEC60825-1:2001 “SAFETY OF LASER
PRODUCTS”. Class 3R/a laser product: It is harmful to observe laser beam continuously. User
should avoid sighting the laser at the eyes. It can reach 5 times the emitting limit of Class2/II
with a wavelength of 400 mm-700 mm.
WARNING
Continuously looking straight at the laser beam is harmful.
Prevention:
Do not stare at the laser beam or point the laser beam to other’s eyes. Reflected laser beam
is a valid measurement to the instrument.
WARNING
When the laser beam emits on prism, mirror, metal surface, window, etc., it is dangerous to
look straight at the reflex.
Prevention:
Do not stare at the object which reflects the laser beam. When the laser is switched on
(under EDM mode), do not look at it on the optical path or near the prism. It is only allowed
to observe the prism with the telescope of total station.
WARNING
Improper operation on laser instrument of Class 3R will bring dangers.
Prevention:
To avoid being harmed, each user is required to take safety precautions, and take everything
under control within the distance that would incur dangers (according to IEC60825-1:2001).
The following shows the explanation related to the key sections of the Standard. Laser instrument of
Class 3R is applicable outdoors and in construction field (measurement, defining lines, leveling).
• Only those persons who are trained with related course and authenticated can install, adjust, and
operate this kind of laser instrument.
• Stand related warning symbols in the scale of use.
• Prevent any person to look straight at or use optical instrument to observe the laser beam.
• 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.
• The optical path of the laser should be set higher or lower than the line of sight.
• When the laser instrument is not in use, take care of it properly. The person who is not
authenticated is not allowed to use.
• 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.
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