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Class IV
.
These may produce injuries caused by the direct beam or its specular and diffused reflections. They
also involve fire risk. In addition to the precautions mentioned in the previous section, the following
should also be used:
(1) The Laser Marker must be installed, adjusted and operated only by qualified, trained and
authorized personnel.
(2) The area where the Laser Marker will be operating must be identified with a suitable warning
sign (supplied by HITACHI).
(3) The beam and incidence area must be surrounded by the material resistant to the
wavelength emitted by the laser in order to avoid specular reflection in the invisible
spectrum due to the far infrared laser emission.
(4) The presence of people in the beam path must be avoided in order to prevent exposure to
emission or specular reflections.
(5) Carbon plates or other sufficiently thick refractory materials must be installed at the end of
the beam path. Nevertheless some precautions must be taken, as the surface of these
materials can vitrify after lengthy exposure, causing specular reflection.
(6) Whenever possible, the beam path must be located either above or below eye level.
In spite of all safety elements included in the Laser Marker end user should wear safety goggles that
completely cover the eyes when operating the system, in order to avoid any injury caused by specular
emission. It is also advisable to wear cotton clothing, which is much more resistant to this kind of emission.
Each country establishes its own safety standards concerning the sales and distribution of laser products.
All of them are quite similar.
UNITED STATES OF AMERICA
In this country, the standards which regulate the use of Class IV laser products concerning labeling and
safety interlocks must be observed.
OFFICE OF COMPLIANCE (HFZ-312)
CENTRE FOR DEVICES AND RADIOLOGICAL HEALTH
US DEPARTMENT OF HEALTH & HUMAN SERVICES
8757 GEORGIA AVENUE
SILVER SPRING, MD 20910
TEL.: (301) 427-1172
EUROPE
INTERNATIONAL ELECTROTECHNICAL COMMISSION
IEC STANDARD
EMISSION SAFETY OF LASER PRODUCTS, EQUIPMENT
CLASSIFICATION, REQUIREMENTS AND USER’S GUIDE.
Safety devices and protections supplied by HITACHI will not necessarily meet requirements of the
Customer’s Local Factory Inspector, Laser Safety and Country Regulations and no warranty or
representation is given or made that they comply with any statutory or other requirement. No liability is
accepted by HITACHI in this respect.
