Download Environmental Monitoring for Cleanrooms and Controlled by Anne Marie Dixon PDF

By Anne Marie Dixon

A serious know-how within the technological know-how of illness keep an eye on, environmental tracking is a method that gives vital information at the caliber of a procedure, processing surroundings, and ultimate product, that can reduction scientists in deciding upon and removing capability resources of illness in cleanrooms and regulated environments.

Because the translation of effects is key in controlling illness, numerous chapters speak about the presentation of knowledge, trending, and investigations, and the way they're beneficial in decreasing possibility to the product, technique, and sufferer.

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Additional info for Environmental Monitoring for Cleanrooms and Controlled Environments

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ISO 14698-2. Cleanrooms and Associated Controlled Environments—Part 2: Biocontamination Control, Evaluation, and Interpretation of Biocontamination Data. 6. Yamamoto T, Donovan RP, Ensor DS. Model study for optimization of cleanroom airflows. J Environ Sci 1988; 31(6):24–29. 7. Yamamoto T. Airflow modeling and particle control by vertical laminar flow. In: Donovan RP, ed. Particle Control for Semiconductor Manufacturing. New York: Marcel Dekker, 1990:301–323. 8. Fitzner K. Particle movement in cleanrooms with laminar flow.

9. 10. 11. 12. 13. Airborne particle count for classification Airborne particle count for ultrafine particles Airborne particle count for macroparticles Airflow Air pressure difference Installed filter system leakage Airflow direction and visualization Temperature Humidity Electrostatic and ion generator Particle deposition Recovery Containment leakage As identified in ISO 14644-1 and ISO 14644-2, some of these tests are mandatory but most are voluntary. The key controlling factor in the quality level of any cleanroom is the owner’s requirements and what measurements are necessary to achieve that level of performance.

Sampling via Nozzles or Inlets The sampling of the air from a cleanroom involves aspirating air from ambient air through a nozzle. Ideally, the particles in the air would enter the sample nozzle The Behavior of Particles in Cleanrooms 19 FIGURE 12 Illustration of isokinetic sampling flow. Source: From Ref. 48. without separation of particle by size from inertial effects or deposition of the particles inside the nozzle or tubing. The preferred sampling approach is to match the flow velocity in the inlet with the velocity in the ambient air.

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