Particulate And Gaseous Contamination Specifications - Dell EMC PowerEdge R940 Installation And Service Manual

Table 27. Operating temperature de-rating specifications
Operating temperature de-rating
Up to 35°C (95°F)
35°C to 40°C (95°F to 104°F)
40°C to 45°C (104°F to 113°F)

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 28. Particulate contamination specifications
Particulate contamination
Air filtration
Conductive dust
Corrosive dust
Table 29. Gaseous contamination specifications
Gaseous contamination
Copper coupon corrosion rate
Silver coupon corrosion rate
NOTE: Maximum corrosive contaminant levels measured at ≤50% relative humidity.
30 Technical specifications
Specifications
Maximum temperature is reduced by 1°C/300 m (1°F/547 ft) above 950 m
(3,117 ft).
Maximum temperature is reduced by 1°C/175 m (1°F/319 ft) above 950 m
(3,117 ft).
Maximum temperature is reduced by 1°C/125 m (1°F/228 ft) above 950 m
(3,117 ft).
Specifications
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.
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.
• 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.
Specifications
<300 Å/month per Class G1 as defined by ANSI/ISA71.04-1985.
<200 Å/month as defined by AHSRAE TC9.9.