Du Pont SORVALL RC-5 Service Manual page 196

Son/all®
Centrifuges
Calibration
ProceduresTable
7-2. Test Point Description
forP.C.
Board,
PN
50059
(Continued)NOTERefrigeration
system
will
also be
off
for
two,
minimum of
40
seconds
onrun
cycle.
Hold
mode
compressor
is on no longer
than
15
seconds
andmust
be off for two
minutes.TP-7
- TP-1
10 Vdc
Temperature
Control Power
Supply.
Lights lamps in
PhotoCell
and
power
for
temperature
meter bridge
circuit.TP-8
-
TP-1 Controls
compressor
0 Volts
Compressor
on,
5 Vdc
Compressor
off.TP-9
- TP-1 5 Vdc
power
to temperature control
logic.Table
7-3. Potentiometer Adjustment
forP.C.
Board.
PN
50059R4
TP-1
-
TP-7. 10 Vdc
Temperature
Control Pilot and Bridge
Circuit.NOTEAdjust
R4
before adjusting
R7.R7
TP-1
-
TP-9. 5 Vdc
Power to Temperature Control
Logic.R9
Speed
Control High
rpm
Setting
20 000
rpm.R18
Speed
Control Low
rpm Setting
1000
rpm.*R40
Temperature
Control
Indicating Needle
+40 Set
Point.*R41
Temperature
Control
Indicating Needle
-20 Set
Point.NOTEUse
temperature calibrating test set when adjusting
R40 and
R41.*R42
Temperature
Control
Orange Pointer (hold). Adjust to
turnCompressor
on when
Temperature
Indicating Needle meets
HoldTemperature
Set
Point.7-13