Dell EMC PowerEdge R940xa, Инструкция по установке и обслуживанию, Страница: 167 / 177

Ambient temperature limitations
The following table lists configurations that require ambient temperature less than 30°C:
NOTE: The ambient temperature limit must be adhered to ensure proper cooling and to avoid excess CPU throttling,
which may impact system performance.
Table 42. Configuration-based ambient temperature restrictions
System Backplane CPU Thermal
Design Power
(TDP)
CPU heat sink Fan type GPU Ambient
restriction
PowerEdge
R940xa 24 x 2.5 inch SAS/
SATA + 8 x 2.5
inch SAS/SATA Up to 205 W 2U height HSK +
4U height HSK Standard fan ≥1 double-width/
single-width 30°C
8 x 2.5 inch SAS/
SATA Up to 205 W 2U height HSK +
4U height HSK Standard fan ≥1 double-width/
single-width 30°C
Particulate and gaseous contamination specifications
The following table defines the limitations that help avoid any equipment damage or failure from particulate and gaseous contamination. If
the levels of particulate or gaseous pollution exceed the specified limitations and result in equipment damage or failure, you may need to
rectify the environmental conditions. Remediation of environmental conditions is the responsibility of the customer.
Table 43. Particulate contamination specifications
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: The ISO Class 8 condition applies to data center environments only. This air
filtration requirement does 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 44. Gaseous contamination specifications
Gaseous contamination Specifications
Copper coupon corrosion rate <300 Å/month per Class G1 as defined by ANSI/ISA71.04-2013.
Silver coupon corrosion rate <200 Å/month as defined by ANSI/ISA71.04-2013.
NOTE: Maximum corrosive contaminant levels measured at ≤50% relative humidity.
Technical specifications 167