Sorvall RT/T6000D - Page 269

SORVALL®
Centrifuges
RT6000D. T6000D,
RT6000B. and
T6000B
Centrifuges
Serial Number
9101800
and
Above
d.
Control
P.C.
Board (PN
83025)
Calibration,
Revision
2 ONLY
Preparation
for Calibration
1.
Turn
the
centrifuge
power
OFF.
Open
the
front
panel (see
paragraph
5-32).
2.
Preset
the following
potentiometers:
Potentiometer
R60
R86
Rl
R2
Setting
Fully
Clockwise
Fully Clockwise
Fully
Counterclockwise
Fully
Clockwise
Function
Delayed
Start
Acceleration Rate
Minimum
Speed
Maximum
Speed
NOTE
All
test
points
and
point
measurements
are
referenced to
TP-1
(ground).
3.
Turn
the
centrifuge
power
ON
and
set
the
speed
control
knob
to OFF.
then
preset
the
Frequency
to Voltage
(FTV)
potentiometer
(R94)
to read
approximately
0.730
±0.05
Vdc at
the
junction
of
variable
resistor
R94
and
fixed
resistor
R95
(left
side
ofR95);
turning
R94
counterclockwise increases
voltage.
Refer
to figure
9-17.
4.
ff
installing
a new
Control
P.C.
Board,
preset
the
imbalance
potentiometer
(R120)
to
1.5
Vdc
as
measured at TP14.
Turning
R120
counterclockwise
increases
voltage.
Refer to
figure
9-14. After finishing the Control
P.C.
Board
calibration, perform
the
Imbalance calibration
on
page
9-63.
Power
Supply
Check
1.
Check the line
voltage
across
the
top
terminals (1 and 2)
of CB1
(verify
±10%).
2.
Turn
on
the
main
circuit
breaker
(CB 1)
and check the
low
voltage
power
supply
voltages
with
respect to
ground
(TP1):
Power
Supply
Voltage
(Vdc)
+24
+12
+5
Measurement
Point
R157*
TP16
TP15
Target Voltage
Range
(Vdc)
+24
±0.5
+12+0.5
+5
±0.5
*
Refer
to
figure
9-18.
Slow Start
Adjustment
(R60
&
R86)
1.
Set the
POWER
switch
to ON.
Open
the
centrifuge lid.
Install
an
H-
1000B
rotor
and
fully
load
the
buckets.
Make
sure
the
buckets
swing freely.
Close and
lock
lid.
2.
Make
sure
R60
(Delayed
Start)
and
R86
(Acceleration Rate)
are
turned fully
clockwise.
Rev.
9/92
9-57