Dell PowerEdge R420 Owner's Manual page 125

Environmental
NOTE: Applies to data center and non-data center
environments.
Gaseous Contamination
NOTE: Maximum corrosive contaminant levels measured at ≤50% relative humidity.
Copper Coupon Corrosion Rate
Silver Coupon Corrosion Rate
• Residual dust present in the air must have a
deliquescent point less than 60% relative humidity.
<300 Å/month per Class G1 as defined by ANSI/
ISA71.04-1985.
<200 Å/month as defined by AHSRAE TC9.9.
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