HARRICK ATC-024-1, User Manual

Page: 12 / 22

SINGLE LOOP CONTROL
9 of 17
AUTO-TUNING
Auto-tuning should be dome when the temperature
controller is operated for the first time or when the
accessory or set point is changed. It is not necessary to
redo the auto-tuning procedure if the temperature
controller or heaters have been turned off.
•
Use the Up-arrow
S
and/or the Down-arrow
T
keys to select the desired set point temperature.
The set point is shown in the lower display. The
actual temperature measured by the thermocouple
is shown in the upper display.
•
Make sure the accessory is at room temperature.
The upper display should read between
18 and 26
degrees C.
•
Press the MODE key twice. OFF will appear in
the upper display and Aut will appear in the lower
display.
OFF / Aut
•
Press the Up- arrow
S
key. PidA will appear in
the upper display. Aut will alternate with tune in
the lower display.
•
Press display and turn the heater switch on. The
set point will alternate with
tune in the lower
display and the actual temperature will appear in
the upper display. The auto-tune process takes
approximately 5 minutes. At the end of the auto
tune process, the lower display shows the set
point and the upper display shows the actual
temperature, which should be maintained for an
additional 5 minutes.
•
Press the DSPY key to return to the main display
format.
•
When auto-tuning is complete, turn off the heater
switch and allow the accessory to cool to room
temperature. When the accessory is cool, the
upper display should read between
18 and 26
degrees C.
OPERATION With the system auto-tuned to the desired set point
temperature:
•
Make sure the accessory is at room temperature.
The upper display should read between
18 and 26
degrees C.
•
When the accessory is ready to be heated, turn on
the heater switch. The accessory will now heat to
the set point temperature and hold that
temperature.