3D Systems sPro, Руководство пользователя

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SLS p r o c e s s 3 2 S A F E T Y
u s e r ’ s g u i d e n i t r o g e n / o x y g e n s a f e t y
N i t ro g e n / Ox yg e n S a fe t y
The SLS system uses nitrogen to create an inert
atmosphere in the process chamber. The
nitrogen inhibits any potential rapid combustion
of particulate matter during the selective laser
sintering process.
The oxygen content of air is approximately 21
percent. Displacement of the normal atmosphere
with an inert gas, such as nitrogen, can reduce
the oxygen content in a room. In the remote
chance that nitrogen leaks into the room during
the sintering process, the situation can be
hazardous.
Your site must have an oxygen alarm monitor
installed in the room containing the
SLS system. This monitor will alert you if the
oxygen level drops below a designated point. It
must be wired to trigger an immediate shutdown
of the SLS system and nitrogen generator (if in
use).
The table of Oxygen Deprivation Effects and
Symptoms on page 33 explains the potential
effects and symptoms that can occur at different
concentrations of oxygen in the atmosphere.
When you work in an environment that may
become oxygen-deficient, make sure you comply
with the following items:
`
You have received oxygen/nitrogen safety
training.
`
The room is well-ventilated; at least 4 air
exchanges per hour.
`
Self-contained breathing apparatus is
available and easily accessible.
`
The room oxygen alarm monitor is
functioning and audible
`
Leave the SLS system room/area immediately
when you hear the oxygen alarm.
Exposure to an atmosphere
containing 12 percent or less oxygen
causes unconsciousness without any
warning symptoms. This happens so
quickly that you cannot help or
protect yourself.