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4.2 Watlow MicroDIN

The System

Auto-tune

Auto-tuning allows the controller to explore the responsiveness of the system in

order to determine an effective set of parameters for PID control. To do this it

crosses an auto-tune set point five times, then controls at the normal set point

using the new parameters.

Use Auto-tune Set Point (PID Group) to select the temporary set point, as a

percentage of the normal set point, that the controller will tune to. Initiate or

cancel the auto-tune process with Auto-tune (PID Group). The default value is

90%.

Figure 4.2 — Auto-tuning

Features

Time

Temperature

Auto-tune initiated by user

Process Set Point



Auto-tune Set Point

(default 90% of process set point)



Auto-tune complete

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Watlow MICRODIN Manual do Utilizador Página 34