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Recovery Test

Recovery tests are required for turbulent mixed flow within the framework of re-qualifications and technical modifications. The requirements for the measurement methods DPhE ist using for you are being described in ISO 14644-3.

Generally, DPhE will first artificially raise the cumulative particle number concentration in the room using a particle generator while the system is running. Within the measurement series we are using the same defined particle sizes also in use for the definition of purity classes according to EU-guidelines. Ambient air is being enriched with aerosol in a ratio of 1:100 compared to the defined purity class. After that, rinsing- and cleaning time depending on particle number concentration is being recorded using an optical particle counter (OPC).

DPhE assesses and evaluates the recorded data in a numerical and graphical way for your documentation.