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Theory
of
Operation
Sorvall®
Centrifugeseration
malfunction.
If
a
malfunction
occurs,
it
will
disable
the
centrifuge
drivesystem.•
On
the
tachometer
(rpm
indicator)
the
black
pointer
indicates
the
actual
rpm.•
The
centrifuge
drive
motor
will
operate
when
all
conditions
are
met
and
the
speedcontrol
is
at
any
position
except
zero.•
Motor
relay
K202,
compressor
fan
relay
K203
(on
RC-5
and
early
RC-5B
units)
andRUN-HOLD
relay
K205
are
all
energized.•
230
Vac
is
applied
to
the
compressor
fan
motor
when
K203
is
energized.CAUTIONThe
rotor
must
be
securely
mounted
on
the
drive
spindle
before
the
cen¬trifuge
main
switch
is
set
to
the
ON
position.Conditions
necessary
to
enter
the
RUN
mode
are
as
follows:1.
RC-5:
turn
the
key
switch
in
a
clockwise
direction
to
the
ON
position.2.
Set
the
red
pointer
at
the
temperature
control
to
a
temperature
that
is
at
least
4°Chigher
than
the
indicated
temperature.3.
Latch
the
door
securely.4.
Advance
the
timer
pointer
to
any
position
except
the
OFF
position.5.
RC-5:
press
the
ON
switch.RC-5B:
press
the
START
switch.3-8
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