The working principle of the biosafety cabinet is mainly to pump the air inside the cabinet outwards, so that the cabinet maintains a negative pressure state, and protects the staff through vertical airflow; The outside air is filtered by the high efficiency air filter into the safety cabinet...
(1) Wind speed becomes smaller. When the test finds that the cleanliness index is normal, the downdraft or the inflow flow rate is small; Or during the operation of the biosafety cabinet, if the equipment sends an audible and visual alarm and it is caused by the low flow rate of the downdraft or the...
The current main standards for biosafety cabinet testing are:
(1) EU EN 12469:2000 《Biotechnology-Peformance Criteria for Microbiological Safety Cabinets》
(2) NSF/ANSI 49-2002 《Class II(Laminar Flow) Biosafety Cabinetry》
(3) JG 170-2005 Construction industry standard of the People's Republ...