| Federal Standard 209E | The document that established standard classes of air cleanliness for airborne particulate levels in cleanrooms and clean zones. It prescribed methods for classes of air cleanliness for airborne particulate levels in cleanrooms and clean zones. It prescribed methods for class verification and monitoring of air cleanliness. It also addressed certain other factors but only as they affected control of airborne particulate contamination. Federal Standard 209E is in the process of being replaced by ISO 14644-1. |
