Dell PowerEdge M420 Dell PowerEdge M420 Systems Owner's Manual - Page 62
CR 2032 3.0 V Lithium coin cell, Standard Operating
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Battery NVRAM backup battery CR 2032 3.0 V Lithium coin cell Environmental NOTE: For additional information about environmental measurements for specific system configurations, see dell.com/environmental_datasheets. Storage Temperature Standard Operating Temperature Expanded Operating Temperature -40 °C to 65 °C (-40 °F to 149 °F) with a maximum temperature gradation of 20 °C per hour. 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 per 300 m above 900 m (1 °F per 550 ft). NOTE: When operating in the expanded temperature range, system performance may be impacted. NOTE: When operating in the expanded temperature range, ambient temperature warnings may be reported on the LCD and in the System Event Log. Expanded Operating Temperature Restrictions ≤ 10% of annual operating hours ≤ 1% of annual operating hours 5 °C to 40 °C at 5% to 85% RH with 26 °C dew point. NOTE: 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). -5 °C to 45 °C at 5% to 90% RH with 26 °C dew point. NOTE: 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). Dual-processor configurations are not supported. 62