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Stratos®Pro A4... PH User Manual

Stratos®Pro A4... PH User Manual

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Typical applications<br />

P controller<br />

Application for integrating control systems<br />

(e.g. closed tank, batch processes).<br />

Relay 1<br />

+100 %<br />

Setpoint<br />

-100 %<br />

Controller output<br />

Yp [%]<br />

Neutral zone Yp=0<br />

Controller Functions<br />

PI controller<br />

Application for non-integrating control systems (e.g. drains).<br />

PID controller<br />

The additional derivative action compensates for measurement peaks.<br />

Controller characteristic<br />

Deviation Xw [pH]<br />

Relay 2<br />

107

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