Table 32. Particulate contamination specifications (continued)
Particulate contamination Specifications
Conductive dust Air must be free of conductive dust, zinc whiskers, or other
conductive particles.
NOTE: This condition applies to data center and non-
data center environments.
Corrosive dust • Air must be free of corrosive dust.
• Residual dust present in the air must have a deliquescent point
less than 60% relative humidity.
NOTE: This condition applies to data center and non-
data center environments.
Table 33. Gaseous contamination specifications
Gaseous contamination Specifications
Copper Coupon Corrosion <300 Å/month per Class G1 as defined by ANSI/ISA71.04-1985.
Silver Coupon Corrosion <200 Å/month as defined by AHSRAE TC9.9.
NOTE: Maximum corrosive contaminant levels measured at ≤50% relative humidity.
Technical specifications 105
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