Chapter 4
Maintenance and Technical Manual
Interceptor Biological Safety Cabinet Class II A2
October 2019
4.6
Control Monitor
The Control Monitor Home/Face Velocity Screen can alert you to several possible
problems as you proceed:
1) High inflow velocity (face velocity).
2) Low inflow velocity (face velocity).
3) Sash Height Alarm – Always set the sash at the 10" line when conducting
experiments. This is the setting that has received NSF certification.
4) UV Light on and Fan on.
UV Light
The UV germicidal disinfecting light may be used if one has been installed; fully
close the sash, and turn on the light using the UV Light button. Because UV rays
are dangerous, the light will not operate unless the sash is fully closed. Glass stops
UV radiation. If the UV light is not turned off before the sash is raised, the safety
interlock will disable the UV light.
ê
!
WARNING
If the UV option is on your BSC, be sure safety overrides are never
immobilized! UV light should NEVER be on while sash is open.
Figure 4.12 Home/Face Velocity Screen
Warning – Check Sash Height
