Dell PowerEdge R920 - Manual (Page 8)

Environmental
NOTE: Your system is capable of 40 °C and 45 °C excursion operation for fresh air cooled data centers. For more
information, see the
Owner's Manual at dell.com/support/manuals.
NOTE: For additional information about environmental measurements for specific system configurations, see
dell.com/environmental_datasheets.
Temperature
Maximum Temperature Gradient (Operating and
Storage) 20 °C/h (36 °F/h)
Storage Temperature Limits –40 °C to 65 °C (–40 °F to 149 °F)
Temperature (Continuous Operation)
Temperature Ranges (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 26 °C (78.8 °F)
maximum dew point.
Relative Humidity
Storage 5% to 95% RH with 33 °C (91 °F) maximum dew point.
Atmosphere must be non-condensing at all times.
Maximum Vibration
Operating 0.26 G
rms
at 5 Hz to 350 Hz (all operation orientations).
Storage 1.87 G
rms
at 10 Hz to 500 Hz for 15 min (all six sides tested).
Maximum Shock
Operating One shock pulse in the positive z axis of 40 G for 2.3 ms in
all operational orientations.
Storage 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.
Maximum Altitude
Operating 3048 m (10,000 ft).
Storage 12,000 m (39,370 ft).
Operating Altitude De-rating
Up to 35 °C (95 °F) Maximum temperature is reduced by 1 °C/300 m (1 °F/547
ft) above 950 m (3,117 ft).
35 °C to 40 °C (95 °F to 104 °F) Maximum temperature is reduced by 1 °C/175 m (1 °F/319
ft) above 950 m (3,117 ft).
40 °C to 45 °C (104 °F to 113 °F) Maximum temperature is reduced by 1 °C/125 m (1 °F/228
ft) above 950 m (3,117 ft).
Particulate Contamination
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