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ThinkSystem RAID 930-16i 8GB Flash PCIe 12Gb/s Adapter Installation and User Guide
Version 1.0
B.4
Particulate Contamination
Attention: Airborne particulates (including metal flakes or particles) and reactive gases acting alone or in combination
with other environmental factors such as humidity or temperature might pose a risk to the device that is described in
this document.
Risks that are posed by the presence of excessive particulate levels or concentrations of harmful gases include damage
that might cause the device to malfunction or cease functioning altogether. This specification sets forth limits for
particulates and gases that are intended to avoid such damage. The limits must not be viewed or used as definitive
limits, because numerous other factors, such as temperature or moisture content of the air, can influence the impact
of particulates or environmental corrosives and gaseous contaminant transfer. In the absence of specific limits that are
set forth in this document, you must implement practices that maintain particulate and gas levels that are consistent
with the protection of human health and safety. If Lenovo determines that the levels of particulates or gases in your
environment have caused damage to the device, Lenovo may condition 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 2 Limits for Particulates and Gases
Contaminant
Particulate
Gaseous
a.
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.
b.
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.
c.
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.
The room air must be continuously filtered with 40% atmospheric dust spot efficiency (MERV9)
according to ASHRAE Standard 52.2
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.
The deliquescent relative humidity of the particulate contamination must be more than 60%
The room must be free of conductive contamination such as zinc whiskers.
Copper: Class G1 as per ANSI/ISA 71.04-1985
Silver: Corrosion rate of less than 300 Å in 30 days
Limits
a
.
c
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Appendix B: Notices
Particulate Contamination
b
.
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