provision of repair or replacement of devices or parts on implementation of
appropriate remedial measures to mitigate such environmental contamination.
Implementation of such remedial measures is a customer responsibility.
Table 29. Limits for particulates and gases
Contaminant Limits
Particulate
v The room air must be continuously filtered with 40% atmospheric
dust spot efficiency (MERV 9) according to ASHRAE Standard 52.21.
v Air that enters a data center must be filtered to 99.97% efficiency or
greater, using high-efficiency particulate air (HEPA) filters that meet
MIL-STD-282.
v The deliquescent relative humidity of the particulate contamination
must be more than 60%2.
v The room must be free of conductive contamination such as zinc
whiskers.
Gaseous
v Copper: Class G1 as per ANSI/ISA 71.04-19853
v Silver: Corrosion rate of less than 300 Å in 30 days
1 ASHRAE 52.2-2008 - Method of Testing General Ventilation Air-Cleaning Devices for
Removal Efficiency by Particle Size. Atlanta: American Society of Heating, Refrigerating
and Air-Conditioning Engineers, Inc.
2 The deliquescent relative humidity of particulate contamination is the relative humidity
at which the dust absorbs enough water to become wet and promote ionic conduction.
3 ANSI/ISA-71.04-1985. Environmental conditions for process measurement and control
systems: Airborne contaminants. Instrument Society of America, Research Triangle Park,
North Carolina, U.S.A.
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In the request, be sure to include the publication part number and title.
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Electronic emission notices
Federal Communications Commission statement
This explains the Federal Communications Commission's (FCC) statement.
194 IBM System Storage DS3500 and EXP3500 Storage Subsystem: Installation, User's, and Maintenance Guide
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