Dell EMC PowerEdge M640 Installation and Service Manual

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Particulate and gaseous contamination specifications

The following table defines the limitations that help avoid any equipment damage or failure from particulates and gaseous contamination. If the levels of particulates or gaseous pollution exceed the specified limitations and result in equipment damage or failure, you may need to rectify the environmental conditions. Re-mediation of environmental conditions is the responsibility of the customer.
Table 1. Particulate contamination specifications . Air filtration specification: Data center air filtration as defined by ISO Class 8 per ISO 14644-1 shpuld have a 95% upper confidence limit. Note: This condition applies only to data center environments. Air filtration requirements do not apply to IT equipment designed to be used outside a data center, in environments such as an office or factory floor. Note: Air entering the data center must have MERV11 or MERV13 filtration. Conductive dust specification: 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 specification: 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.
Particulate contamination Specifications
Air filtration Data center air filtration as defined by ISO Class 8 per ISO 14644-1 with a 95% upper confidence limit.
  • NOTE: This condition applies to data center environments only. Air filtration requirements do not apply to IT equipment designed to be used outside a data center, in environments such as an office or factory floor.
  • NOTE: Air entering the data center must have MERV11 or MERV13 filtration.
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 2. Gaseous contamination specifications . 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.
Gaseous contamination Specifications
Copper coupon corrosion rate <300 Å/month per Class G1 as defined by ANSI/ISA71.04-1985.
Silver coupon corrosion rate <200 Å/month as defined by AHSRAE TC9.9.
  • NOTE: Maximum corrosive contaminant levels measured at ≤50% relative humidity.

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