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Table 26. Common Environmental Specifications for ASHRAE A2, A3 and A4
Temperature
Allowable continuous operations
Maximum temperature gradient (applies to both
operation and non-operation)
Non-operational temperature limits
Non-operational humidity limits
Maximum non-operational altitude
Maximum operational altitude
Table 27. Maximum vibration specifications
Maximum vibration
Operating
Storage
Table 28. Maximum shock pulse specifications
Maximum shock pulse
Operating
Storage
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 29. Particulate contamination specifications
Particulate contamination
Air filtration
Conductive dust
Corrosive dust
34
Technical specifications
Specifications
20°C in an hour* (36°F in an hour) and 5°C in 15 minutes (9°F in 15
minutes), 5°C in an hour* (9°F in an hour) for tape hardware
NOTE:
* - Per ASHRAE thermal guidelines for tape hardware, these are
not instantaneous rates of temperature change.
-40 to 65°C (-40 to 149°F)
5% to 95% RH with 27°C (80.6°F) maximum dew point
12,000 meters (39,370 feet)
3,050 meters (10,000 feet)
Specifications
0.21 G
at 5 Hz to 500 Hz for 10 minutes (all operation orientations)
rms
1.88 G
at 10 Hz to 500 Hz for 15 minutes (all six sides tested)
rms
Specifications
Six consecutively executed shock pulses in the positive and negative x, y,
and z axis of 6 G for up to 11 ms
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
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
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