IBM 9008-22L, Планирование площадки и оборудования

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Table 8. Environment requirements (continued)
Environment requirements
Notes:
1. IBM provides the recommended operating environment as the long-term operating environment that
can result in the greatest reliability, energy efficiency, and reliability. The allowable operating
environment represents where the equipment is tested to verify functionality. Due to the stresses
that operating in the allowable envelope can place on the equipment, these envelopes must be used
for short-term operation, not continuous operation.
2. Must derate the maximum allowable temperature 1°C (1.8°F) per 175 m (574 ft) above 900 m (2953
ft) up to a maximum allowable elevation of 3050 m (10000 ft).
3. The minimum humidity level is the larger absolute humidity of the -12°C (10.4°F) dew point and the
8% relative humidity. These levels intersect at approximately 25°C (77°F). Below this intersection,
the dew point (-12°C) represents the minimum moisture level, while above it, the relative humidity
(8%) is the minimum. For the upper moisture limit, the limit is the minimum absolute humidity of the
dew point and relative humidity that is stated.
4. The following minimum requirements apply to data centers that are operated at low relative
humidity:
• Data centers that have do not have ESD floors and where people are allowed to wear non-ESD
shoes might want to consider increasing humidity given that the risk of generating 8 kV increases
slightly at 8% relative humidity, when compared to 25% relative humidity.
• All mobile furnishings and equipment must be made of conductive or static dissipative materials
and be bonded to ground.
• During maintenance on any hardware, a properly functioning and grounded wrist strap must be
used by any personnel who comes in contact with information technology (IT) equipment.
5. Equipment that is removed from the original shipping container and is installed, but is powered
down. The allowable non-operating environment is provided to define the environmental range that
an unpowered system can experience short term without being damaged.
Table 9. Noise emissions for the 9008-22L, 9009-22A, and 9223-22H
Declared noise emission values in accordance with ISO 9296
1, 2, 3, 4, 5
Production
description
Declared A-weighted
sound power level, L
WA,m
(B)
Declared A-weighted
sound pressure level, L
pA,m
(dB)
Statistical adder for
verification, K
v
(B)
Operating Idling Operating Idling Operating Idling
9008-22L,
9009-22A,
and
9223-22H at
23°C
(73.4°F)
ambient
temperature
6.5 6.4 52 52 0.3 0.3
10 Power Systems: Site and hardware planning