Dell PowerEdge R840 EMC Technical Specifications - Page 23

Standard operating temperature, Expanded operating temperature restrictions

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Table 15. Maximum altitude specifications Maximum altitude Operating Storage Specifications 3048 m (10,000 ft) 12,000 m (39,370 ft) Table 16. Operating temperature derating specification Operating temperature derating Specifications Up to 35°C (95°F) Maximum temperature is reduced by 1°C/300 m (1°F/547 ft), above 950 m (3,117 ft). 35-40 °C (95-104 °F) Maximum temperature is reduced by 1°C/175 m (1°F/319 ft), above 950 m (3,117 ft). 40-45 °C (104 °F-113 °F) Maximum temperature is reduced by 1°C/125 m (1°F/228 ft), above 950 m (3,117 ft). Standard operating temperature Table 17. Standard operating temperature specifications Standard operating temperature Specifications Continuous operation (for altitude less than 950 m or 3117 10 °C-35°C (50 °F-95°F) with no direct sunlight on the equipment. ft) Expanded operating temperature Table 18. Expanded operating temperature specifications Expanded operating temperature Continuous operation ≤ 1% of annual operating hours Specifications 5 °C-40°C at 5% to 85% RH with 29°C dew point. NOTE: Outside the standard operating temperature (10 °C-35°C), the system can operate continuously in temperatures as low as 5°C and as high as 40°C. For temperatures 35 °C - 40°C, derate maximum allowable temperature by 1°C per 175 m (1°F per 319 ft.) above 950 m (3,1171 ft.). -5 °C-45°C at 5% to 90% RH with 29°C dew point. NOTE: Outside the standard operating temperature (10 °C-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 40 °C - 45°C, derate maximum allowable temperature by 1°C per 125 m (1°F per 228 ft.) above 950 m (3.117 ft.). NOTE: When operating in the expanded temperature range, the performance of the system may be impacted. NOTE: When operating in the expanded temperature range, ambient temperature warnings may be reported on the LCD panel and in the System Event Log. Expanded operating temperature restrictions • The operating temperature is specified for a maximum altitude of 950 m for Fresh Air Cooling. • Do not perform cold start below 5°C due to hard drive constraints. Technical specifications 23

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Table 15. Maximum altitude specifications
Maximum altitude
Specifications
Operating
3048 m (10,000 ft)
Storage
12,000 m (39,370 ft)
Table 16. Operating temperature derating specification
Operating temperature derating
Specifications
Up to 35°C (95°F)
Maximum temperature is reduced by 1°C/300 m (1°F/547 ft), above 950 m
(3,117 ft).
35–40 °C (95–104 °F)
Maximum temperature is reduced by 1°C/175 m (1°F/319 ft), above 950 m (3,117
ft).
40–45 °C (104 °F–113 °F)
Maximum temperature is reduced by 1°C/125 m (1°F/228 ft), above 950 m
(3,117 ft).
Standard operating temperature
Table 17. Standard operating temperature specifications
Standard operating temperature
Specifications
Continuous operation (for altitude less than 950 m or 3117
ft)
10 °C–35°C (50 °F–95°F) with no direct sunlight on the equipment.
Expanded operating temperature
Table 18. Expanded operating temperature specifications
Expanded operating temperature
Specifications
Continuous operation
5 °C–40°C at 5% to 85% RH with 29°C dew point.
NOTE:
Outside the standard operating temperature (10
°C–35°C), the system can operate continuously in
temperatures as low as 5°C and as high as 40°C.
For temperatures 35 °C – 40°C, derate maximum allowable
temperature by 1°C per 175 m (1°F per 319 ft.) above 950 m
(3,1171 ft.).
≤ 1% of annual operating hours
–5 °C–45°C at 5% to 90% RH with 29°C dew point.
NOTE:
Outside the standard operating temperature (10
°C–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 40 °C – 45°C, derate maximum allowable
temperature by 1°C per 125 m (1°F per 228 ft.) above 950 m
(3.117 ft.).
NOTE:
When operating in the expanded temperature range, the performance of the system may be impacted.
NOTE:
When operating in the expanded temperature range, ambient temperature warnings may be reported on the LCD
panel and in the System Event Log.
Expanded operating temperature restrictions
•
The operating temperature is specified for a maximum altitude of 950 m for Fresh Air Cooling.
•
Do not perform cold start below 5°C due to hard drive constraints.
Technical specifications
23