Sorvall RT/T6000D - Page 276

RT6000D,
T6000D, RT6000B, and
T6000B
SORVALL®
Centrifuges
Centrifuges
Serial
Number
9101800
and
Above
1.
Use
a
feeler
guage
to
adjust
the
set
screw
so
that
there is
a 1.1 mm
+0.13/-0.0
(0.045 inch
+.005/-0.000)
gap
between
the bottom of the
set
screw
and the
imbalance detector
(see
page
5-38).
2.
Install
an
H- 1000B
swinging
bucket
rotor onto
the
drive
spindle.
Be
sure
that all
bucket
trunnions
are
cleaned
and well
lubricated and
that all
four
buckets
swing
freely
on
rotor
trunnions.
Place
tube carriers into
rotor buckets.
3.
Remove two
opposing
buckets from
rotor,
with
carriers installed, and
place
onto
a scale.
4. Prepare
three
(3) test tubes
of
varying
levels of
water:
a.
Fill
one
tube
full
of
water
and
mark the tube with
a
"O".
Place
the
tube,
filled
with
water into
one
bucket
carrier.
This
tube
will
be used
as a
"reference"
tube.
b.
Fill
a second
tube
with
less water than the
"reference"
tube and
place
into the
opposite
bucket
carrier
so
that the
net
difference
in weight between the
two
buckets
equal
19
grams.
Mark the
second tube with
a
"19".
This
tube
will
be
used
as
the
"pass"
tube.
c.
Fill
a
third
tube with
two (2)
grams
more
water than the
"pass"
tube.
Mark the
third
tube
with
a
"21".
This
tube
will
be
used
as
the
"fail"
tube.
5.
Place
both
buckets
and
carriers back
onto
the
rotor in
the
chamber.
6.
Place the
"reference"
tube
into
one
bucket
carrier and the
"fail"
tube in the
opposite
bucket
carrier.
Close
and
lock
the
door.
NOTE
To
ensure
that
the circuit
can
be
calibrated, the
gap
setting must be
pre¬
tested. Follow
steps
7
through
16
to
pre-test
the
gap
setting,
then
continue
the calibration with
step
17.
7.
Adjust
R-146
(revision
I*
PC
Board)
or
R120
(revision
2 PC
Board)
to
read
+4.0
Vdc
at test
point
TP-16
(revision
I*
PC
Board)
orTP-14
(revision
2
PC
Board).
The
+4.0
Vdc should
cause
the
imbalance
circuit to
"trip"
with
the
"fail"
tube
installed.
8.
Set the
speed
control
knob
to
3200
rpm
setting.
9.
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.
*
Revision
1 Contol
P.C.
Boards are actually reworked revision
0
Control
P.C.
Boards,
so
the
designation
silkscreened on
the
board
is revision
0.
9-64
Rev.
7/93