NonStop NS1000 Planning Guide (H06.08+)

Operating Temperature, Humidity, and Altitude
Maximum Rate of Change
per Hour
Recommended Range
1
Operating Range
1
Specification
9° F (5° C) Repetitive
36° F (20° C) Nonrepetitive
68° to 77° F
(20° to 25° C)
41° to 95° F (5° to 35° C)Temperature (all except
Fibre Channel disk module)
1.8° F (1° C) Repetitive
5.4° F (3° C) Nonrepetitive
-50° to 95° F
(10° to 35° C)
Temperature (Fibre Channel
disk module)
6%, noncondensing40% to 50%, noncondensing15% to 80%, noncondensingHumidity
--0 to 10,000 feet (0 to 3,048
meters)
Altitude
2
1 Operating and recommended ranges refer to the ambient air temperature and humidity measured 19.7 in. (50 cm)
from the front of the air intake cooling vents.
2 For each 1000 feet (305 m) increase in altitude above 10,000 feet (up to a maximum of 15,000 feet), subtract 1.5× F
(0.83× C) from the upper limit of the operating and recommended temperature ranges.
Nonoperating Temperature, Humidity, and Altitude
• Temperature:
— Up to 72-hour storage: - 40° to 151° F (-40° to 66° C)
— Up to 6-month storage: -20° to 131° F (-29° to 55° C)
— Reasonable rate of change with noncondensing relative humidity during the transition
from warm to cold
• Relative humidity: 10% to 80%, noncondensing
• Altitude: 0 to 40,000 feet (0 to 12,192 meters)
Cooling Airflow Direction
Each enclosure includes its own forced-air cooling fans or blowers. Air flow for each enclosure
enters from the front of the modular cabinet and rack and exhausts at the rear.
Typical Acoustic Noise Emissions
70 dB(A) (sound pressure level at operator position)
Tested Electrostatic Immunity
• Contact discharge: 8 KV
• Air discharge: 20 KV
Calculating Specifications for Enclosure Combinations
“Example of a 4-Processor Configuration” (page 35) shows components installed in a single 42U
modular cabinet. Cabinet weight includes the PDUs and their associated wiring and receptacles.
Power and thermal calculations assume that each enclosure in the cabinet is fully populated.
The power and heat load is less when enclosures are not fully populated, such as a Fibre Channel
disk module with fewer disk drives.
AC current calculations assume that one PDU delivers all power. In normal operation, the power
is split equally between the two PDUs in the cabinet. However, calculate the power load to
assume delivery from only one PDU to allow the system to continue to operate if one of the two
AC power sources or PDUs fails.
34 System Installation Specifications