Dell DL4000 Owner's Manual page 82

Expanded Operating Temperature
< 1% of annual operating hours
Expanded Operating Temperature Restrictions
Environmental
NOTE: For additional information about environmental measurements for specific system
configurations, see dell.com/environmental_datasheets.
Temperature
Maximum Temperature Gradient (Operating and
Storage)
Storage Temperature Limits
Relative Humidity
Storage
Temperature (Continuous Operation)
Temperature Ranges (for altitude less than 950 m
or 3117 ft)
Humidity Percentage Range
Maximum Vibration
82
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).
• Do not perform a cold startup below 5 °C.
• The operating temperature specified is for a
maximum altitude of 3048 m (10,000 ft).
• GPU is not supported
• 130 W (4 core) and 135 W processor is not
supported
• Redundant power supplies are required
• Non Dell qualified peripheral cards and/or
peripheral cards greater than 25 W are not
supported
20 °C/h (36 °F/h)
–40 °C to 65 °C (–40 °F to 149 °F)
5% to 95% RH with 33 °C (91 °F) maximum dew
point. Atmosphere must be non-condensing at
all times.
10 °C to 35 °C (50 °F to 95 °F) with no direct
sunlight on the equipment.
10% to 80% Relative Humidity with 26 °C (78.8
°F) maximum dew point.