Dell PowerEdge MX740c EMC PowerEdge MX740c Installation and Service Manual - Page 126

Standard operating temperature, Table 29. Expanded operating temperature specifications

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Table 26. 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: 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 nondata 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 nondata center environments. Table 27. Gaseous contamination specifications Gaseous contamination Specifications Copper coupon corrosion rate

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Table 26. 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:
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 nondata 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 nondata center
environments.
Table 27. Gaseous contamination specifications
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.
Standard operating temperature
Table 28. Standard operating temperature specifications
Standard operating temperature
Specifications
Continuous operation (for altitude less than 950 m or
3117 ft)
10°C to 35°C (50°F to 95°F) with no direct sunlight on the
equipment.
Humidity percentage range
10% to 80% Relative Humidity with 29°C (84.2°F) maximum dew
point.
Expanded operating temperature
Table 29. Expanded operating temperature specifications
Expanded operating temperature
Specifications
Continuous Operation
5°C–40°C at 5% to 85% RH with 29°C dew point
NOTE:
Outside the standard operating temperature (10°C–35°C),
the system can operate continuously in temperatures as low as 5°C
and as high as 40°C.
For temperatures 35°C–40°C, derate maximum allowable dry bulb
temperature by 1°C per 175 m above 950 m (1°F per 319 ft).
Less than or equal to 1% of annual operating hours
–5°C–45°C at 5% to 90% RH with 29°C dew point
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Technical specifications