IBM DS4700 manual Environmental requirements and specifications, Temperature and humidity

Environmental requirements and specifications

This section describes the environmental requirements and specifications for the DS4700 Express Storage Subsystem, including temperature and humidity, altitude, airflow and heat dissipation, shock and vibration requirements, and acoustic noise levels.

Temperature and humidity

Table 13 lists the acceptable temperature and humidity ranges for the DS4700 Express Storage Subsystem when in storage or in transit. Table 14 lists temperature and humidity ranges for the storage subsystem in typical Information Technology (IT) or office environments. Table 15 lists temperature and humidity ranges for the storage subsystem in a Telco/NEBS-3 compliant environment.

Note: Substantial deviations from the suggested operating range, in either direction, if sustained for extended periods of time, will expose the unit to greater risk of failure from external causes.

Important: The recommended operating environment air temperature is 22° C (72° F) or lower.

Table 13. Temperature and humidity requirements for storage subsystem when in storage or in transit

Condition	Parameter	Requirement
Temperature	Storage range	-10° - 65° C (14° - 149° F)
	Maximum rate of change	15° C (27° F) per hour
	Transit range	-40° C to 65° C (-40° F to
		149° F)
	Maximum rate of change	20° C (36° F) per hour
Relative humidity (no	Storage range	8% to 90%
condensation)
	Transit range	5% to 95%
	Maximum dew point	26° C (79° F)
	Maximum gradient	10% per hour
Table 14. Temperature and humidity requirements for storage subsystem in a typical
Information Technology (IT) or office environment
Condition	Parameter	Requirement
Temperature	Operating range	10° - 35° C (50° - 95° F)
	Maximum rate of change	10° C (18° F) per hour
Relative humidity (no	Operating range	8% to 80%
condensation)

Table 15. Temperature and humidity requirements for storage subsystem in a Telco/NEBS-3 compliant environment

Condition	Parameter	Requirement
Temperature1	Operating range	5° - 40° C (41° - 104° F)
	Short-term2	-5° - 50° C (23° - 122° F)
	Maximum rate of change	30° C (54° F) per hour

24IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide