Table 19. Continuous Operation Specifications for ASHRAE A4
- Allowable continuous operations
Temperature range for altitudes <= 900 m (<=
2953 ft)
5–45°C (41–113°F) with no direct sunlight on the equipment
Humidity percent range (non-condensing at all
times)
8% RH with -12°C minimum dew point to 90% RH with 24°C (75.2°F)
maximum dew point
Operational altitude de-rating Maximum temperature is reduced by 1°C/125 m (33.8°F/410 Ft) above
900 m (2953 Ft)
Table 20. Common Environmental Specifications for ASHRAE A2, A3, and A4
- Allowable continuous operations
Maximum temperature gradient (applies to both
operation and non-operation)
20°C in an hour* (36°F in an hour) and 5°C in 15 minutes (41°F in 15
minutes), 5°C in an hour* (41°F in an hour) for tape
NOTE: * - Per ASHRAE thermal guidelines for tape hardware, these are
not instantaneous rates of temperature change.
Non-operational temperature limits -40 to 65°C (-104 to 149°F)
Non-operational humidity limits 5% to 95% RH with 27°C (80.6°F) maximum dew point
Maximum non-operational altitude 12,000 meters (39,370 feet)
Maximum operational altitude 3,048 meters (10,000 feet)
Table 21. Maximum vibration specifications
Maximum vibration Specifications
Operating 0.21 G
rms
at 5 Hz to 500 Hz (all operation orientations)
Storage 1.88 G
rms
at 10 Hz to 500 Hz for 15 minutes (all six sides tested)
Table 22. Maximum shock pulse specifications
Maximum shock pulse Specifications
Operating Six consecutively executed shock pulses in the positive and negative x, y,
and z axis of 6 G for up to 11 ms.
Storage Six consecutively executed shock pulses in the positive and negative x, y,
and z axis (one pulse on each side of the system) of 71 G for up to 2 ms.
Thermal air restrictions
ASHRAE A3/A4 environment
● The operating temperature is for a maximum altitude of 950 m for ASHRAE A3/A4 Cooling.
● If over 950 m, we need to do the ambient temperature de-rating.
● CPU TDP greater than 80 W is not supported.
● BOSS-N1 (M.2) module is not supported.
● A2 GPU card is not supported.
● Non-Dell qualified peripheral cards and/or peripheral cards greater than 25 W are not supported.
● Two PSUs are required in redundant mode.
Technical specifications
25