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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.

Environmental specifications Table 23.

Temperature

Continuous operation

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).

Storage

–40 °C to 65 °C (–40 °F to 149 °F) with a maximum temperature gradation of 20

°C per hour

Expanded operation

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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Dell H730P Specifications Page 42