Laminar Airflow Smoke Test

It must be checked that no smoke is refluxed out of the cabinet once drawn in and no smoke billows over the work surface or penetrates it.

Laminar airflow smoke test.

An airflow visualization smoke pattern test should be used to train and instruct compounding personnel in proper aseptic technique for every pec in which they work. A smoke pattern test relies on a visual medium smoke being generated in a manner that allows observation of airflow patterns. Through a smoke test it is easy to see where an airborne contaminant will likely end up using visual evidence of air flow direction. Water based fog generators such as co 2 generators dry ice and water create an effluent that is significantly heavier than air thus causing fall out during a test.

Air particulate matter count assesses laminar flow hood air for the presence of particulate matter. Terry patamawenu 9 177 views. Air flow visualization microbiological safety cabinet class ii type a2 downward airflow front sash lifting cross contamination using the burner. Not more than 100 particles of size more than or equal to 0 5 micron per cubic feet of sampled air is allowed.

Total microbial count should be less than one. Smoke visualization testinguses a source of visible smoke that is neutrally buoyant. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. Specific airflow air flow pattern visualization testing standards and guidelines are provided by the usp and fda.

Perform the test from 5 different locations. Working in a horizontal flow laminar air flow workstation lafw is different that working in a vertical flow biological safety cabinet bsc or compounding aseptic isolator cai. Airflow patterns could be easily disturbed with equipment design machine guarding necessary interventions and inappropriate component specifications. This enables our technicians to render unidirectional airflow visible and reveal any anomalies such as dead spots and potential reflux of ambient air.

The visual smoke must be neutrally buoyant and mimic ambient air. Airflow smoke tests rely on visual smoke generated in cleanrooms and hoods that allows for observation of airflow patterns. This test is to verify that the air flows smoothly downwards with no dead spots or reflux and that it does not escape from the cabinet. The visual medium must be nearly neutrally buoyant.