Labconco 3970202 User Manual - Safety Precautions

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Chapter 4: Performance Features and Safety Precautions 

11. Filter Clamping Bolt evenly seals the HEPA filter to the 

frame of the enclosure.  See Figure 4-1 and 4-2. 

12. Control Panel.  The control panel, which is located above 

the sash, contains the filter pressure gauge, control switches 

and the electronics.  See Figure 4-1. 

13. HEPA (High Efficiency Particulate Air) Filter is rated to 

remove 99.99% of all particles 0.3 micron in size.  See 

Figure 4-2. 

14. Lamp Ballast (Not Shown) for the fluorescent lamp is 

located behind the control panel.   

15. Variable Digital Timed UV (Ultraviolet) Lamp (Not 

Shown), allows the operator to surface disinfect the work 

area of the enclosure when it is not in use.  The UV light 

rays will not penetrate the plane of the sash and lower 

airfoil. The UV light timer is variable with eight settings in 

minutes of 5, 10, 15, 30, 60, 120, 240, and infinity.  This 

provides extreme flexibility for PCR protocol.  It is easily 

changed by, selecting the time necessary located on the 

control panel.  To operate, simply select the UV light 

option on the light switch. 

16. UV Sash Closure provides added safety to prevent access 

inside the enclosure.  See Figure 4-3. 

17. Accessory Work Surface is dished and contoured to fit the 

dimensions of the enclosures to contain spills.  

18. Upper Diffuser Screen provides protection for the HEPA 

Filter and promotes even distribution of downflow air.  See 

Figure 4-2. 

19. Prefilter (roughing) enhances the life of the HEPA filter 

by trapping large particles.  It should be replaced quarterly. 

Safety Precautions 

1.  Although the enclosure has been engineered to maintain 

Class 5 air conditions, caution should always be used while 

working.  Prior to using the enclosure, check to make