OPERATION
1
2 3
8 9
Control Panel 1. Fan/post-use over-run switch 2. Power outlet switch 3. Gas reset switch* 4. Fluorescent light switch 5. UV lamp switch* 6. Boost mode switch 7. Display panel 8. Mains power indicator
9. Alarm indicator *optional function
4 5 6 7
High-efficiency filters and fans deliver quiet operation and safety. Negative pressure zones surround all positive pressure areas, eliminating the possibility of contaminated air bypassing the filter or escaping from the cabinet. Outer shells are gas-tight for safe decontamination. In operation, vertical laminar airflow through a HEPA filter bathes the work tray, dividing and passing around the perimeter to create a biologically clean work area. In Class II & Cytotoxic cabinets: An air barrier across the work access opening, into the sump, reduces potential risks to personnel from airborne contaminants in the work zone. In Class II models, the airflows mix in the sump before recirculation via a return air plenum to the top housing. Exhaust air is passed through a HEPA filter for return to the laboratory.
In Cytotoxic models, the airflows combine in the sump area beneath the work floor and pass through an extra HEPA filter before recirculation via a return air plenum, to the top housing. Separate fan/filter arrangements allow independent adjustment to maintain an effective air barrier. A microprocessor is used to control the speed of the blower motors. This microprocessor also allows fingertip control of functions and status including: • Cabinet performance and status clearly displayed in plain English. • Boost mode. • Built-in stopwatch.
Powered by FlippingBook