Clean Room Classification
What is Cleanroom ? A cleanroom has a controlled level of contamination that is specified by the number of particles per cubic meter at a specified particle size. Particle counting is done in two ways: Non-Viable Particle count (NVPC) Viable Particle Count Non-Viable Particle count (NVPC) At Rest: A cleanroom that is complete and ready for operation with all servicing functioning and with equipment installed and operable as specified but without operating personal in the facility. At Operation: A cleanroom is normal operation with all services functioning and with equipment and personal and performing their normal work function in the facility. Q: Why we consider only 0.5µ and 5µ particles? A: Size less then 0.5µ is not very critical because microbes are less likely to attach to this size of the particle and greater than 5µ particle becomes heavy as the size of these particles increases and can be easily settled down. Viable Particle Count CFU= Colony Forming Unit Air sam