Table 21 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
l
Air must be free of corrosive dust.
l
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.
The copper coupon corrosion rate is <300 Å/month per Class G1 as defined by ANSI/ISA71.04-1985. The silver coupon
corrosion rate is <200 Å/month as defined by AHSRAE TC9.9.
Table 22 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
R840xd Owner's Guide
29
