Table 23. Common Environmental Specifications for ASHRAE A2, A3 and A4 (continued)
Temperature Specifications
Non-operational humidity limits 5% to 95% RH with 27°C (80.6°F) maximum dew point
Maximum non-operational altitude 12,000 meters (39,370 feet)
Maximum operational altitude 3,050 meters (10,006 feet)
Table 24. Maximum vibration specifications
Maximum vibration Specifications
Operating 0.21 G
rms
at 5 Hz to 500 Hz for 10 minutes (all operation orientations)
Storage 1.88 G
rms
at 10 Hz to 500 Hz for 15 minutes (all six sides tested)
Table 25. Maximum shock pulse specifications
Maximum shock pulse Specifications
Operating Six consecutively executed shock pulses in the positive and negative x, y,
and z axis of 6 G for up to 11 ms
Storage Six consecutively executed shock pulses in the positive and negative x, y,
and z axis (one pulse on each side of the system) of 71 G for up to 2 ms
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. Remediation of environmental conditions is the responsibility of
the customer.
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 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.
Walk-Up Edge Data Center or Cabinet (sealed, closed
loop environment)
Filtration is not required for cabinets that are anticipated to be opened
6 times or less per year. Class 8 per ISO 1466-1 filtration as defined
above is required otherwise
NOTE: In environments commonly above ISA-71 Class G1 or that
may have known challenges, special filters may be required.
34 Technical specifications
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