Dell Precision 7920 Rack Owner's Manual page 18

Table 9. Relative humidity specifications
Relative humidity
Storage
Operating
Table 10. Maximum vibration specifications
Maximum vibration
Operating
Storage
Table 11. Maximum shock specifications
Maximum shock
Operating
Storage
Table 12. Maximum altitude specifications
Maximum altitude
Operating
Storage
Table 13. 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 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 14. Particulate contamination specifications
Particulate contamination
Air filtration
18 Product Overview
Specifications
5% to 95% RH with 33°C (91°F) maximum dew point. Atmosphere
must be non-condensing at all times.
10% to 80% relative humidity with 29°C (84.2°F) maximum dew
point.
Specifications
0.26 G at 5 Hz to 350 Hz (all three axes).
rms
1.88 G at 10 Hz to 500 Hz for 15 min (all six sides tested).
rms
Specifications
Six consecutively executed shock pulses in the positive and negative x,
y, and z axes of 6 G for up to 11 ms.
Six consecutively executed shock pulses in the positive and negative x,
y, and z axes (one pulse on each side of the system) of 71 G for up to
2 ms.
Specifications
3048 m (10,000 ft)
12,000 m (39,370 ft)
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: 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.