Inspur NF5180M6, Руководство пользователя

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corrosively levels are G1 (mild), G2 (moderate), G3 (harsh), and GX (severe), as
described in
Table 8-7 .
Table 8-7 Gaseous Corrosively Levels per ANSI/ISA-71.04-2013
Severity
Level Copper
Reactivity
Level Silver Reactivity
Level Description
G1 (mild) < 300 Å/month < 200 Å/month An environment sufficiently
well-controlled such that
corrosion is not a factor in
determining equipment
reliability.
G2
(moderate) < 1000
Å/month < 1000 Å/month An environment in which
the effects of corrosion are
measurable and may be a
factor in determining
equipment reliability.
G3 (harsh) < 2000
Å/month < 2000 Å/month An environment in which
there is high probability that
corrosive attack will occur.
GX (severe)
≥ 2000
Å/month
≥ 2000 Å/month An environment in which
only specially designed and
packaged equipment would
be expected to survive.
See
Table 8-8 for the requirements on the copper and silver corrosion rates.
Table 8-8 Concentration Limitation on Corrosive Airborne Contaminants in a Data
Center
Group
Gas Unit Concentration
Group A
H
2
S ppb
a
<3
SO
2
ppb <10
Cl
2
ppb <1
NO
2
ppb <50
Group B
HF ppb <1
NH
3
ppb <500
O
3
ppb <2
a: Part per billion (ppb) is the number of units of mass of a contaminant per
1000 million units of total mass.
Group A and group B are common gas groups in a data center. Group A's or group B's
concentration limitation values correspond to copper and silver reactivity level G1.