Setpoint Ramp adjustment

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Setpoint Ramp adjustment

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Setpoint Ramp effects: Undershoot of pressure, Response time

 

This parameter defines the time that is used to decrease / raise pressure between 2 setpoints. Especially in pressure decrease situations at low flows pressure response can be improved much by adapting setpoint ramp time.

 

Pressure chart

PressureChart

Choose the applicable formula depending on units you are familiar with.

 

t = Setpoint Ramp

 

Adjustment procedure:

 

1.Start with optimal Gain Factor and sensor delay time according to preceding tuning steps.

2.Control a typical pressure / flow situation.

3.Control a lower pressure.

4.Repeat from step 2 with longer setpoint ramps until best response is achieved.

5.Verify pressure control response for a setpoint raise situation.

 


Pfeil

In case a long ramp time is required to get optimal performance for pressure decrease situations it may be of advantage to apply different settings for decrease / raise control situations.