Averaging a changing value in Crouzet Millenium 3

[Robert76]

Hi there,

I wonder if there is somebody familiar with Millenium 3 programming.

I have a temperature that i want to average continously, for example averaging 120 values during 2 minutes.

I dont know if REDUCED AVERAGE can do this, i just cant understand how it works.

Using STORAGE uses too few values.

It will be interersting too see your answers!:site:

Thank you in advance
Robert

 

[Peter Nachtwey]

Here is an example of a low pass two pole Butterworth filter. A single pole low pass filter requires one less multiply and divide than the two pole Butterworth filter but the Butterworth filter provides an extra 20 db drop per decade over the single pole filter. I think that is a big gain for just a little extra effort. BTW, only the last two outputs must be stored so it requires much less storage and math at runtime than averaging the last 120 readings.
http://deltamotion.com/peter/Mathcad/Mathcad - Butterworth PLC.pdf

 

[Robert76]

The same for Crouzet Millenium 3

Hi, thank you very much for your effort! I will learn a lot of high level knowledge from this.

But does anybody know how this or some other solution can be used in Crouzet Millenium 3 that i need to get working?

If the answer was for Millenium 3 i apologize being an amateur not understanding.

Im looking forward for advise on Millenium 3

Thank you in advance whoever will help me.
Robert

 

[Robert76]

Got some advise from supplier

See enclosed picture, one cycle is usually 10 ms. 100 makes it sample once every sec.

/robert