IBM System Storage DCS9900 1269-3S2 Storage Expansion Unit Installation, Service, and User Guide
10
1.5.6 Environment
Table 1–3
Ambient Temperature and Humidity
Temperature Range
Relative Humidity
Max. Wet Bulb
Operational
+5°C to +40°C
(+41°F to +104°F)
20% to 80%
non-condensing
23°C (73.4F)
Non-Operational
0°C to +50°C
(+32°F to +122°F)
8% to 80%
non-condensing
27°C (80.6°F)
Storage
+1°C to +60°C
(+33.8°F to +140°F)
8% to 80%
non-condensing
29°C (84.2°F)
Shipping
-40°C to +60°C
(-40°F to +140°F)
5% to 100%
non-precipitating
29°C (84.2°F)
Airflow
System must be operated with low pressure rear exhaust installation.
(Back pressure created by rack doors and obstacles not to exceed 5
pascals [0.5mm Water gauge]).
Altitude, Operational
0 to 2133m (0 to 7,000ft)
(10,000ft at maximum ambient of 35°C)
Operational Derating
Derate ambient temperature by 1 degree C for every 1000 feet (304.8
meters) increase above sea level.
Altitude, Non-Operational
-305 to 12,192m (-1000 to 40,000ft)
Shock, Operational
Vertical axis 5g peak 1/2 sine, 10ms
Shock, Non-Operational
30g 10ms 1/2 sine
Vibration, Operational
0.21grms 5-500 Hz Random
Vibration, Non-Operational
1.04grms 2-200 Hz Random
Vibration, Relocation
0.3g 2-200 Hz sine
Acoustics
Sound Pressure Operating
- Less than 58 dB LpA average
measured at the bystander positions.
(The 4 bystander positions are 1m horizontal and 1.5m off the floor
positioned front, back, left, and right. The unit under test will be
measured on the floor.)
Measured at 20°C
Orientation and Mounting
19" Rack mount (3 EIA Units)
• Rack Rails
To fit 800mm depth Racks compliant with IEC 297
• Rack Characteristics
Back pressure not exceeding 5 pascals (0.5mm water gauge)
Safety and Approvals
CE, UL, cUL
• EMC
EN55022 (CISPR - A), FCC A
Cooling
1365 BTU/hour
Capacity of exhaust
72 cfm
