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 30. Limits for particulates and gases
Contaminant Limits
Particulate
• The room air must be continuously filtered with 40% atmospheric dust spot efficiency (MERV
9) according to ASHRAE Standard 52.2
1
.
• 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%
2
.
• The room must be free of conductive contamination such as zinc whiskers.
Gaseous
• Copper: Class G1 as per ANSI/ISA 71.04-1985
3
• 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.
Telecommunication regulatory statement
This product may not be certified in your country for connection by any means whatsoever to interfaces of
public telecommunications networks. Further certification may be required by law prior to making any such
connection. Contact a Lenovo representative or reseller for any questions.
Electronic emission notices
When you attach a monitor to the equipment, you must use the designated monitor cable and any
interference suppression devices that are supplied with the monitor.
Additional electronic emissions notices are available at:
http://thinksystem.lenovofiles.com/help/index.jsp
Appendix C. Notices 267
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