OM0228
Page
21
of
99
February/2014
6.0
Operating
the
NU
‐
430
6.1
Biological
Safety
Cabinet
Control
6.1.1
Overview
The
Biological
Safety
Cabinet
Control
(BSCC)
system
is
designed
to
service
the
control
requirements
of
the
NU
‐
430
Biological
Safety
Cabinet.
The
control
system
is
a
self
‐
contained
microprocessor
driven
module
that
will
perform
the
following
functions:
Easy
user
interface
via
TOUCHLINK
LCD
Control
blower
DC
ECM
Motor
via
solid
‐
state
DC
Motor
Controller
Monitor,
display
and
control
downflow,
via
digital
dual
thermistor
airflow
sensor
Monitor,
display
and
optionally
control
exhaust
flow
(inflow)
via
digital
differential
velocity
pressure
flow
grid
Alarm
setpoints;
high/low
for
error
conditions
(downflow
and
exhaust
flow)
Date/Clock
display
and
timer
function
Control
lights
via
solid
state
switch
Control
outlets
via
solid
state
switch
Complete
diagnostic
functions
The
NU
‐
430
BSCC
system
offers
the
latest
digital
microprocessor
design
technology
for
improved
cabinet
performance
and
safety.
The
control
system
uses
a
digital
dual
thermistor
airflow
sensor
in
the
downflow
stream
to
monitor
and
control
airflow
to
setpoints.
The
control
system
automatically
compensates
for
filter
loading,
voltage
variances
and
other
environmental
effects.
A
digital
differential
velocity
pressure
glow
grid
in
the
exhaust
airstream
monitors
for
exhaust
volume
and
subsequent
inflow
velocity.
Downflow
velocity,
exhaust
volume
and
inflow
velocity
are
displayed
on
the
TOUCHLINK
LCD
screen.
The
control
system
also
monitors
the
sliding
window
position
with
a
micro
switch
for
both
window
height
and
window
closed
positions.
The
control
system
through
the
use
of
the
front
panel
controls
the
on/off
function
of
the
fluorescent
and
ultraviolet
lights
(optional),
outlets
and
DC
ECM
motor/blower.
The
control
system
also
allows
contact
closure
outputs
for
interaction
with
HVAC
systems
to
optimize
environmental
performance.
User
interface
to
the
BSCC
system
is
accomplished
via
the
TOUCHLINK
LCD.
Basic
use
of
the
LFBSC
is
accomplished
via
the
icons
located
along
the
top
of
the
screen
as
shown
below.
Touch
an
icon
to
turn
on/off
functions
as
indicated.
Each
icon
will
illuminate
with
color
to
indicate
when
the
function
is
turned
on.
The
menu
icon
will
always
prompt
a
menu
screen
to
display.
Selecting
a
menu
item
will
continue
the
prompts
until
the
desired
parameter
is
achieved.
To
return
to
the
main
menu,
press
the
MENU
icon
repeatedly
to
reverse
out
of
the
parameter
menus.
BLOWER
UV
LIGHT
FLUORESCENT
LIGHT
OUTLET
TIMER
MENU
MENU
FL
UV
Summary of Contents for Labgard NU-430-400
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