Thermo Scientific System IV, Installation, Operation, Basic Maintenance

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TuneLoop
The controller is used to tune the COOL PID values; configure the unit to
continue to run (Indc) or shut down (FLt) in the event of a fault; set the high
(Hit) and low (Lot) temperature limits; and enable/disable auto restart (Auto).
If a temperature limit is exceeded the controller will display an error code,
see Section VI.
NOTE:
Serial Communication (SEr) is not operational. Ensure the display
indicates OFF.
Setup Loop
CooL
is used to adjust the controller's PID values. However ,
Thermo Fisher recommends only a qualified technician change the
PID values. Incorrect values will hamper unit performance. Factory
set values are: P = 15; I = 0.3; D = 0.0.
With the controller displaying the fluid temperature, press and
hold the
NO
key and then press the
NEXT ENTER
key. The
controller will display
tunE
. Press
YES
to display
CooL
.
Press
NEXT ENTER
to display
Stor
, press
YES
to accept all the changes, press
NO
to abort all
changes and restore all the previous values. The
controller will again display the fluid temperature.
Press
NEXT ENTER
to display the
alarm (
ALr
) prompt. Press
YES
to
display
Indc
and have the unit continue
to run in the case of a fault. Press
NO
to
display
FLt
and have the unit shut down
in the case of a fault. The factory preset
is
FLt
.
Press
NEXT ENTER
to display the
high temp (
Hit
) alarm setting. If
desired, use the arrow keys to
change the value. The factory
preset value is 55°C.
Press
NEXT ENTER
to display the
low temp (
Lot
) alarm setting. If
desired, use the arrow keys to
change the value. The factory preset
value is -10°C.
Press
NEXT ENTER
to display the
auto restart (
Auto
) prompt. Use
the arrow keys enable/disable this
feature. The factory preset is ON.
Press
NEXT ENTER
to display the
serial comm (
SEr
) prompt. The
display should flash
NO
. If not, use
the arrow keys until
NO
is
displayed.