Sorvall RT/T6000D - Page 205

SORVALL®
Centrifuges
RT6000B
and
T6000B
Centrifuges
Serial
Numbers
Below
9101800
NOTE
Be
sure
to
replace
the
foam insulation
insert and rubber
gyro
boot
cover
after
each adjustment
as
they affect the
imbalance calibration
sensitivity.
11. Readjust
R-3
to
read +0.5
Vdc at
I.C.
U4
pin 4.
The
+0.5
Vdc should
prevent
the
imbalance circuit from
"tripping"
when
the
"pass"
tube
is installed.
12. Replace
the
"fail"
tube
with
the
"pass"
tube.
13.
Set
the
speed
control
knob
to
3200
rpm
setting.
14.
Set the timer control knob to
the
"HOLD"
position
to
start
the
centrifuge.
The
rotor
should
begin accelerating
towards
3200
rpm.
NOTE
The
FAULT LED
indicator
on
the
front console
should
not
illuminate
as
the
rotor
accelertates between
500
rpm
and
1000
rpm.
15.
If
the rotor
speed
exceeds
1500
rpm,
stop
the
run in
progress by
turning
the
speed
control
knob
to off.
If
the circuit
"tripped"
with
the
"pass"
tube installed,
remove
the rotor and
regap
the
set screw
by
turning
1/8
turn counter clockwise.
Retest
again
and continue
adjusting
the
gap
until
the
rotor does not
"trip"
at
+0.5
Vdc
with the
"pass"
tube
installed.
NOTE
Be
sure
to
replace
the
foam insulation insert and rubber
gyro
boot
cover
after
each
readjustment
as they
affect the
imbalance
calibration
sensitivity.
16.
Continue
adjusting
the
gap
of the
set
screw
until the
"fail"
tube
trips
the
circuit
at
a
+4.0
Vdc
setting
and
a
"pass"
tube
runs
at
a
+0.5
Vdc
setting
without
any
further
gap
readjustments.
This will
ensure
that the
circuit
can
be calibrated.
17.
Readjust adjust
R-3
to
read +4.0
Vdc
at
I.C.
U4
pin
4.
18.
Replace
the
"pass"
tube
with the
"fail"
tube.
19.
Set
the
speed
control
knob
to
3200
rpm
setting.
20.
Set
the
timer
control
knob
to
the
"HOLD"
position
to
start
the
centrifuge.
The
rotor
should
begin
accelerating
towards
3200
rpm.
NOTE
The
FAULT
LED
indicator
on
the front
console
should illuminate
as
the
rotor
accelerates between
500
rpm
and
1000
rpm.
Rev.
7/93
8-35