Dell PowerEdge R920 Owner's Manual page 137

NOTE: Your system is capable of 40 °C and 45 °C excursion operation for fresh air cooled data centers.
NOTE: For additional information about environmental measurements for specific system configurations, see
dell.com/environmental_datasheets.
Temperature
Maximum Temperature Gradient (Operating and
Storage)
Storage Temperature Limits
Temperature (Continuous Operation)
Temperature Ranges (for altitude less than 950 m or
3117 ft)
Humidity Percentage Range
Relative Humidity
Storage
Maximum Vibration
Operating
Storage
Maximum Shock
Operating
Storage
Maximum Altitude
Operating
Storage
Operating Altitude 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 Contamination
20 °C/h (36 °F/h)
–40 °C to 65 °C (–40 °F to 149 °F)
10 °C to 35 °C (50 °F to 95 °F) with no direct sunlight on the
equipment.
10% to 80% Relative Humidity with 26 °C (78.8 °F)
maximum dew point.
5% to 95% RH with 33 °C (91 °F) maximum dew point.
Atmosphere must be non-condensing at all times.
0.26 G at 5 Hz to 350 Hz (all operation orientations).
rms
1.87 G at 10 Hz to 500 Hz for 15 min (all six sides tested).
rms
One shock pulse in the positive z axis of 40 G for 2.3 ms in
all operational orientations.
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.
3048 m (10,000 ft).
12,000 m (39,370 ft).
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).
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