Maintenance and Technical Manual
Chapter 3
Interceptor Biological Safety Cabinet Class II A2
October 2019
3.1
CHAPTER 3
Decontamination / Repairs
Decontamination
Upon leaving the factory, the BSC Control Monitor was calibrated and fan voltage
adjusted to the proper values:
Figure 3.1 Control Monitor – Info Screen
Figure 3.2 Control Monitor – Face Velocity 105 FPM
When new, the Interceptor
®
Biological Safety Cabinet Control Panel shows key
values on the display. Remaining Filter Capacity should be 100%; Face Velocity
should read 105 FPM (+- 2 FPM).
After much use, these values (remaining Filter Capacity and Face Velocity) will both
decrease. When this inevitable change occurs, some adjustment of motor RPM can
restore face velocity, but will not restore the filter capacity readout. (see Chapter 2)
Below the 50% filter capacity level, it may no longer be possible to achieve 105 FPM
by simply raising the motor RPM. Since NSF 49 requires the minimum operating
average face velocity be between 100 FPM and 110 FPM, velocity readings below 100
FPM require filter replacement.
Since both filters lie inside the contaminated Air Chamber, the BSC must be
decontaminated before opening up the panel to replace these filters.
ê
!
WARNING
Opening the Air Chamber Access Panel requires a complete decontamination
of the upper plenum area. Decontamination may only be performed by an
NSF Accredited Technician.
