Sorvall RT/T6000D - Page 274

RT6000D,
T6000D,
RT6000B,
and
T6000B
SORVALL®
Centrifuges
Centrifuges
Serial
Number
9101800
and Above
12.
Adjust
variable
resistor
R21
(1.97
Vdc
reference)
until
1.000
±0.005
Vdc Is
displayed on
the
voltmeter.
13. Adjust
variable resistor
R3
(Temperature
Indicator Adjust) until
0°C
is
displayed
on
the
temperature
meter.
14.
Set the
temperature
knob
slightly
below
0°C.
Adjust variable resistor
R7
(Compressor
Adjust)
so
that the
compressor
just
turns
on.
NOTE
The
compressor
may
have to
be turned
off
then
turned
back
on
by
adjusting
R7.
(The
compressor
will
turn
off
after
a
five
(5)
second
delay.)
Let
pressures
equalize
before each turnoff. Restart after
a
15
to
20
second
delay
to
minimize head
pressure
build-up.
15.
Set the
temperature
knob
slightly above
0°C
to ensure
that the
compressor
turns
off
at
this
setting,
then
return
the knob
to
the
previous setting to
verify
that the
compressor
turns
on.
NOTE
The
compressor
will
turn
off
after
a
five
(5)
second
delay.
16.
When the
temperature
calibration is
complete,
reinstall
the
temperature
sensor
in
the
centrifuge chamber.
17.
As
required,
apply
Mortite®
sealant
(PN
60255)
in
the bottom
side
of the bowl
to
seal
the
centrifuge chamber.
18.
Place the
gyro
insulator
(PN
67556)
over
the
gyro
assembly, making
sure
that the
slot in
the
insulator lines
up
with the
Imbalance
arm bracket.
19.
Place
the
gyro
boot
(PN 07638)
over
the
insulator,
making
sure
that the
lip
of the
boot is
tucked
in
the
groove
of
the
gyro
housing.
20.
Set the
POWER
switch
to OFF.
21.
Disconnect
the
digital voltmeter.
22.
Close and
secure
the front
panel.
e.
Brake Test
1.
Turn
the
centrifuge
power
ON.
Install
an
H 1 OOOB
rotor
and
fully
load the buckets.
Close and
latch the
door.
2.
Set
the
run
speed
to
3200
rpm
and the
run
time
to
HOLD.
then
turn
the
BRAKE
switch ON.
After the
rotor accelerates to
3200
turn
the
speed
control
knob OFF.
Measure
the
time
it
takes for
the
rotor
to reach
0
rpm.
The
time
should be less
than
150
seconds;
if
it
is
not,
refer
to
paragraph
6-23
(brake
circuit theory)
for
troubleshooting and
diagnosis.
9.52
Rev-2/93