Dell PowerEdge R920 Dell PowerEdge R920 Getting Started Guide - 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) 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 Grms at 5 Hz to 350 Hz (all operation orientations). 1.87 Grms at 10 Hz to 500 Hz for 15 min (all six sides tested). 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). 8