This part of iso 14644 specifies requirements for periodic testing of a cleanroom or clean zone to prove its continued compliance with iso 14644 1 for the designated classification of airborne particulate cleanliness. Only particle populations having cumulative distributions based on threshold lower limit particle sizes ranging from 0 1 µm to 5 µm are considered. Bs en iso 14644 1 2015 cannot be used to characterize the physical chemical radiological viable or other nature of airborne particles.
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