Environmental Specifications - Dell PowerEdge R920 Technical Manual

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Environmental specifications
Table 23 details the environmental specifications for the R920. For additional information about
environmental measurements for specific system configurations, see
Dell.com/environmental_datasheets.
Temperature
Continuous operation
Storage
Expanded operation
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Dell PowerEdge Technical Guide
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Table 23. Environmental specifications
10°C to 35°C at 10% to 80% relative humidity (RH), with 26 °C max dew point. De‐
rate maximum allowable dry bulb temperature at 1 °C/300m above 900m (1 °F
per 550 ft).
–40 °C to 65 °C (–40 °F to 149 °F) with a maximum temperature gradation of 20
°C per hour
When operating in the expanded temperature range, system performance may be
impacted. When operating in the expanded temperature range, ambient
temperature warnings may be reported on the LCD and in the System Event Log.
≤10% of annual operating hours: 5°C to 40°C at 5% to 85% RH with 26°C dew
point.
≤1% of annual operating hours : –5°C to 45°C at 5% to 90% RH with 26°C dew
point.
Outside the standard operating temperature (10 °C to 35 °C), the system can
operate down to 5 °C or up to 40 °C for a maximum of 10% of its annual
operating hours. For temperatures between 35 °C and 40 °C, de‐rate maximum
allowable dry bulb temperature by 1 °C per 175 m above 950 m (1 °F per 319 ft).
Outside the standard operating temperature (10 °C to 35 °C), the system can
operate down to –5 °C or up to 45 °C for a maximum of 1% of its annual
operating hours.
For temperatures between 40 °C and 45 °C, de‐rate maximum allowable dry bulb
temperature by 1 °C per 125 m above 950 m (1 °F per 228 ft).
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8, 16, 32