IBM NeXtScale System, Planning And Implementation Manual

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Chapter 4. IBM NeXtScale nx360 M4 compute node
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򐂰 Power off
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:
– Temperature: 5°C to 45°C (41°F - 113°F)
– Relative humidity: 8% - 85%
– Maximum dew point: 27°C (80.6°F)
򐂰 Storage (non-operating):
– Temperature: 1°C to 60°C (33.8°F - 140°F)
– Altitude: 3050 m (10,006 ft)
– Relative humidity: 5% - 80%
– Maximum dew point: 29°C (84.2°F)
򐂰 Shipment (non-operating)
6
:
– Temperature: -40°C to 60°C (-40°F - 140°F)
– Altitude: 10,700 m (35,105 ft)
– Relative humidity: 5% - 100%
– Maximum dew point: 29°C (84.2°F)
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3
Moisture levels lower than 0.5°C DP, but not lower -10 °C DP or 8% relative humidity, can be
accepted if appropriate control measures are implemented to limit the generation of static electricity
on personnel and equipment in the data center. All personnel and mobile furnishings and
equipment must be connected to ground via an appropriate static control system. The following
items are considered the minimum requirements:
a. Conductive materials (conductive flooring, conductive footwear on all personnel who go into the
datacenter; all mobile furnishings and equipment are made of conductive or static dissipative
materials).
b. During maintenance on any hardware, a properly functioning wrist strap must be used by any
personnel who contact IT equipment.
4
5°C/hr for data centers that are using tape drives and 20°C/hr for data centers that are using disk
drives.
5
Chassis is removed from original shipping container and is installed but not in use, for example,
during repair, maintenance, or upgrade.
6
The equipment acclimation period is 1 hour per 20°C of temperature change from the shipping
environment to the operating environment.
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Condensation, but not rain, is acceptable.