Cleanroom Testing Frequency

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How often do I need to test my cleanroom to see if it’s meeting classification requirements? Is there standard protocol for cleanroom calibration, cleanroom certification and cleanroom re-certification?

Level VI Cleanroom User Asked on May 2, 2018 in Cleanroom Certification.
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ISO requires that air pressure difference and air flow be tested every 12 months for all classifications. Particle count tests must be performed every 12 months ISO Class 6 and above, every six months for ISO Class 5 and below. There are also tests recommended for all classes, every 24 months: installed filter leakage, containment filter leakage, recovery, and airflow visualization. These tests are regulated by ISO document 14644-2 Cleanroom Testing and Compliance.

It states the maximum time interval between airborne particle concentration testing of a cleanroom of ISO class 5 and below is six months and ISO class 6 and above is 12 months.

Here are some of the common cleanroom testing intervals that I use:

Test Parameter: Airborne particle concentrations
Class: =< ISO Class 5
Maximum Time Interval: 6 Months

Test Parameter: Schedule of additional tests
Class: >ISO Class 5
Maximum Time Interval: 12 Months

Test Parameter: Airflow velocities in unidirectional airflow
Class: All Classes
Maximum Time Interval: 6 Months

Test Parameter: Airflow volume supply in non-unidirectional airflow
Class: All Classes
Maximum Time Interval: 12 Months

Test Parameter: Pressure differentials
Class: All Classes
Maximum Time Interval: Continuously

Level VI Cleanroom User Answered on May 2, 2018.
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