Table 5. Limits for particulates and gases
Contaminant Limits
Particulate •
The room air must be continuously filtered with 40%
atmospheric dust spot efficiency (MERV9) according to
ASHRAE Standard 52.2
1
.
•
Air that enters a data center must be filtered to 99.97%
efficiency or greater, using highefficiency 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.
7.3.4. 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.
7.3.5. 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:
https://pubs.lenovo.com/important_notices/
7.3.6. Taiwan region BSMI RoHS declaration
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