IBM Marine Radio DS4700 Manuale Utente
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.
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.
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.
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
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)
149° F)
Maximum rate of change
20° C (36° F) per hour
Relative humidity (no
condensation)
condensation)
Storage range
8% to 90%
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
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
condensation)
condensation)
Operating range
8% to 80%
Table 15. Temperature and humidity requirements for storage subsystem in a Telco/NEBS-3
compliant environment
compliant environment
Condition
Parameter
Requirement
Temperature
1
Operating range
5° - 40° C (41° - 104° F)
Short-term
2
-5° - 50° C (23° - 122° F)
Maximum rate of change
30° C (54° F) per hour
24
IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide