Imagine Selenio X100, Инструкция по установке и эксплуатации

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Appendix A
Laser Safety Guidelines
142
Precautions for Unenclosed Systems
During service, maintenance, or restoration, an optical fiber telecommunication system is
considered unenclosed. Under these conditions, follow the practices described below.
CAUTION!
Only authorized, trained personnel shall be permitted to do service, maintenance,
and restoration.
1 Avoid exposing the eye to emissions from unterminated, energized optical connectors at
close distances.
2 Ensure that only authorized, trained personnel use optical test equipment during
installation or servicing.
3 Turn off all laser sources before scanning a fiber with an optical test set.
4 Keep all unauthorized personnel away from the immediate area of the optical fiber systems
during installation and service.
For guidance on the safe use of optical fiber communication systems in the workplace,
consult
ANSI Z136.2, American National Standard for Safe Use of Lasers in the U.S. or
outside the U.S., IEC-60825, Part 2 .
Label
The label shown in Figure A-1A-1 is applicable to Class 1 laser products.
Figure A-1 Label for Class 1 Laser Products
Inspecting and Cleaning Fiber Optic Connections
When connecting fibers, ensure that you do not touch the end of the fiber, or allow it to
become dirty. Small amounts of microscopic dust or other contaminants can seriously
impair or disable a fiber optic network. If you touch the end of a fiber prior to connecting it,
or otherwise allow it to become dirty, you must carefully inspect and clean the connection.
Table A-1 lists some typical contaminants of a fiber optic connection.
CLASS 1
LASER PRODUCT
Table A-1 Typical Contaminants
Contaminant Comments
Dust particle, 1 micron Can block up to 1% of the light transmission, creating a
loss of 0.05 dB
Dust particle, 9 microns Although microscopic, the particle can completely block
the fiber core
Human hair Typically 50 to 75 microns in diameter