Some software might differ from its retail version (if available) and might not include user manuals or all program functionality.
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 server 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 server 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 IBM determines that the levels of particulates or gases in your environment have caused damage to the server, IBM may condition provision of repair or replacement of servers or parts on implementation of appropriate remedial measures to mitigate such environmental contamination. Implementation of such remedial measures is a customer responsibility.
Table 14. 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 |
| |
| 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 |
| v Silver: Corrosion rate of less than 300 Å in 30 days |
1ASHRAE
2The 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
German Ordinance for Work gloss statement
The product is not suitable for use with visual display work place devices according to clause 2 of the German Ordinance for Work with Visual Display Units.
Das Produkt ist nicht für den Einsatz an Bildschirmarbeitsplätzen im Sinne § 2 der Bildschirmarbeitsverordnung geeignet.
Notices 123
