PM-800-GL INSTRUCTION MANUAL
7
7
Safety information
The PM-800 instrument emits no optical power itself and does not create any
hazards to the user. To ensure a high level of operator safety during installation,
commissioning and operating the equipment, as well as ensuring that the equipment
remains undamaged, it is necessary to consider the following general warnings and
recommendations.
For high power optical signal the safety rules for laser systems must be observed,
see laser classification.
Installation, commissioning, operation and service of equipments with high power
level are only allowed to be carried out by an authorised person.
Use only the equivalent connector types to those built into the instrument in
order to avoid damage to the instrument components.
Optical connectors must be clean, in case the connectors are not perfectly clean –
please clean them according to the procedure described in the technical
specification for the relevant connectors.
Never use magnifying devices to inspect optical fiber ends unless you are sure
that no optical power is being emitted.
Use only magnifying devices with a built-in infra-red filter to ensure safety.
During operation, testing or maintenance of a fiber optic system, never look into
an active fiber optic cable. Infrared radiation may be present and permanent eye
damage can result.
Avoid direct exposure to the beam.
Do not activate the laser when there is no fiber attached to the optical output
connector.
Under no circumstances should you look into the end of an optical cable attached to
the optical output when the device is operational. The laser radiation can seriously
damage your eyesight.
7.1 Laser classification
A laser is a light source that can be dangerous to the people exposed to it. Even low power
lasers can be hazardous to eyesight. A person exposed to laser radiation (especially
invisible radiation) may be unaware that damage is occurring. Some lasers are so powerful
that even the diffuse reflection from a surface can be hazardous to the eye. Laser radiation
predominantly causes eye injury via thermal effects on the retina. A transient increase of
only 10 °C can destroy retinal photoreceptors
Lasers have been classified by wavelength and maximum output power into four classes
and a few subclasses since the early 1970s. The classifications categorize lasers according
to their ability to produce damage in exposed people, from class 1 (no hazard during
normal use) to class 4 (severe hazard for eyes and skin). There are two classification
systems, the "old system" used before 2002, and the "revised system" being phased in
since 2002. The latter reflects the greater knowledge of lasers that has been accumulated
since the original classification system was devised, and permits certain types of lasers to
be recognized as having a lower hazard than was implied by their placement in the original
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