Dell PowerEdge R940xa EMC Technical Specifications - Page 26

Standard operating temperature, Thermal and acoustics, Thermal design

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Table 13. Relative humidity specifications Relative humidity Specifications Storage 5% to 95% RH with 33°C (91°F) maximum dew point. Atmosphere must be non-condensing at all times. Operating 10% to 80% relative humidity with 29°C (84.2°F) maximum dew point. Table 14. Maximum vibration specifications Maximum vibration Specifications Operating Storage 0.26 Grms at 5 Hz to 350 Hz (all three axes). 1.88 Grms at 10 Hz to 500 Hz for 15 min (all six sides tested). Table 15. Maximum shock specifications Maximum shock Specifications Operating Six consecutively executed shock pulses in the positive and negative x, y, and z axes of 6 G for up to 11 ms. Storage 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. Table 16. Maximum altitude specifications Maximum altitude Specifications Operating 3048 m (10,000 ft) Storage 12,000 m (39,370 ft) Table 17. Operating temperature de-rating specifications Operating temperature de- Specifications rating 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°C to 40°C (95°F to 104°F) Maximum temperature is reduced by 1°C/175 m (1°F/319 ft) above 950 m (3,117 ft). 40°C to 45°C (104°F to 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 18. Standard operating temperature specifications Standard operating temperature Continuous operation (for altitude less than 950 m or 3117 ft) Specifications 10°C to 35°C (50°F to 95°F) with no direct sunlight on the equipment. Thermal and acoustics The system's thermal management delivers high performance through optimized cooling of components at the lowest fan speeds across a wide range of ambient temperatures from 10°C to 35°C (50°F to 95°F) and to extended ambient temperature ranges. These optimizations result in lower fan power consumption which translate to lower system power and data center power consumption. Thermal design The thermal design of the system reflects the following: • Optimized thermal design: The system layout is architected for optimum thermal design. System component placement and layout are designed to provide maximum airflow coverage to critical components with minimal expense of fan power. 26 Technical specifications

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Table 13. Relative humidity specifications
Relative humidity
Specifications
Storage
5% to 95% RH with 33°C (91°F) maximum dew point. Atmosphere must be non-condensing at all times.
Operating
10% to 80% relative humidity with 29°C (84.2°F) maximum dew point.
Table 14. Maximum vibration specifications
Maximum vibration
Specifications
Operating
0.26 G
rms
at 5 Hz to 350 Hz (all three axes).
Storage
1.88 G
rms
at 10 Hz to 500 Hz for 15 min (all six sides tested).
Table 15. Maximum shock specifications
Maximum shock
Specifications
Operating
Six consecutively executed shock pulses in the positive and negative x, y, and z axes of 6 G for up to 11 ms.
Storage
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.
Table 16. Maximum altitude specifications
Maximum altitude
Specifications
Operating
3048 m (10,000 ft)
Storage
12,000 m (39,370 ft)
Table 17. Operating temperature de-rating specifications
Operating temperature de-
rating
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°C to 40°C (95°F to
104°F)
Maximum temperature is reduced by 1°C/175 m (1°F/319 ft) above 950 m (3,117 ft).
40°C to 45°C (104°F to
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 18. Standard operating temperature specifications
Standard operating temperature
Specifications
Continuous operation (for altitude less than 950 m or 3117 ft)
10°C to 35°C (50°F to 95°F) with no direct sunlight on the
equipment.
Thermal and acoustics
The system's thermal management delivers high performance through optimized cooling of components at the lowest fan speeds across a
wide range of ambient temperatures from 10°C to 35°C (50°F to 95°F) and to extended ambient temperature ranges. These
optimizations result in lower fan power consumption which translate to lower system power and data center power consumption.
Thermal design
The thermal design of the system reflects the following:
•
Optimized thermal design: The system layout is architected for optimum thermal design. System component placement and layout are
designed to provide maximum airflow coverage to critical components with minimal expense of fan power.
26
Technical specifications