Maintenance and Technical Manual
Chapter 4
Interceptor Biological Safety Cabinet Class II A2
October 2019
4.7
Control Monitor Messages and Meanings
Variable
Measurement Method
Importantance
Recommended Action
Airflow
(optimal value
is 105 FPM)
Since the inflow at any point of the
10" sash opening can vary widely,
it is the average inflow (CFM/sq ft)
that is actually measured. Since
the “air in” through the 10" sash
opening exactly equals “air out”,
the exhaust port, the Interceptor
®
converts the FPM exhaust port
velocity into FPM inflow velocity at
the sash opening.
Proper inflow at 10"
assures containment of
contaminants within the
cabinet. NSF 49 requires
a minimum inflow velocity
of 100 FPM.
The Home/Face Velocity
Screen shows airflow. Any
velocity between 100 FPM
and 110 FPM is acceptable.
If face velocity falls below
100 FPM, discontinue work
and contact your Accredited
Technician for remediation.
Remaining
Filter Life
The static pressure differential
between the negative and positive
pressure is proportional to filter
loading. It is measured by the
Pressure Sensor and converted by
the Contol Module to a filter loading
percentage.
The Interceptor
®
exceeds
NSF requirements for
maximum static load.
An Accredited Technician
may need to adjust fan
speed to maintain face
velocity or change filter.
Sash Alarm
Banner
A micro switch interaction with
the counterweight activates this
warning.
The cabinet is designed
to be used at a 10"
sash opening. Any other
opening is inappropriate. If
the fan is on at any height
other than 10", the
Yellow
Sash Alarm Banner
displays.
Return the sash to 10" or
turn the unit off and close
the sash.
UV Light
(when installed)
When the sash is closed and the
fan is off, the disinfecting UV Light
may be activated using the UV Light
button on the Control Panel Touch
Pad.
Be sure UV Light Safety
Overrides are never
immobilized! UV light
should NEVER be on
while sash is open.
Close sash and turn fan off
to reactivate UV.
Remaining UV
Lamp Life
Internal countdown timer. Setting
of 2000 hours can be reset to
manufacturers recommendations.
When the hood UV light is
on, it is important to know
how much life is remaining
in the UV lamp before its
UV output diminishes. The
remaining UV lamp life
natation is displayed in the
Info/About
screen.
Replace UV lamp, even if
it still glows, when ‘0’ hours
remaining is indicated.
Table 4.1
