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ACCUTEMP SERIES 480°F VACUUM DRYING OVEN USER’S MANUAL
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6.3. Calibration by Auto-Tune (AT)
Follow the steps below to perform a standard Auto Tune:
a.
Under [MAIN] mode, press and hold the “Shift/AT” button for six seconds, until you see the screen below.
b.
Press the “Inc/BL” button and set AT to “on”, then press “Set” to confirm. The controller will display a
flashing [AT] light, indicating that auto-tune is in progress. After a few cycles of fluctuation, auto-tune will
complete and the [AT] light will turn off. This could take a few hours. The “Set” button is disabled during
this period.
c.
If necessary, press and hold the “Shift/AT” button for six seconds during the auto-turn process to
abort. The [AT] light will turn off.
d.
A new set of optimized PID values will be automatically saved for future use.
e.
Now set the target temperature. You are ready to use the oven.
6.4. Calibration by formula
Offset the temperature difference between temperature controller and your reference value manually.
6.4.1. First, calculate the offset value using the formula on the next page (in blue). Press and hold “Set” button
for 3 seconds; controller will display “Lc” as below.