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How to eliminate glitches or false signal?

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John_Ess:
I need some help with my 820-DC-RC program that controls a water pump...

I have this 0-10V input coming from a pressure transmitter that continuously monitors water pressure during pumping operation. Obviously there is some water hammer (or pipe vibration) when the pump turns OFF, and that creates a sudden pressure spike that I would like to ignore in my program.

Any ideas how?

Thanks,
John

Spellbreaker:
Do you get a Signal or something when the Pump turns off?

Maikky:
Dear John.

You may use the signal smoothing filter function block during that period.

Regards
Maikky

John_Ess:

--- Zitat von: Spellbreaker am April 11, 2014, 08:48:20 Vormittag ---Do you get a Signal or something when the Pump turns off?

--- Ende Zitat ---

Yes I do, as the pump starts at "low" pressure level and has to stop at the certain "high" pressure level.
And that's when the sudden pressure spike occurs. So it's kind of chicken and egg scenario :)

Ideally I would like to ignore in my program any pressure changes during the pump OFF action and 3 seconds immediately after the pump's stopped.

John_Ess:

--- Zitat von: Maikky am April 11, 2014, 08:53:11 Vormittag ---Dear John.

You may use the signal smoothing filter function block during that period.

Regards
Maikky

--- Ende Zitat ---

Hi Maikky,

I looked into http://www.trainingscenter.moeller.net/functions/easySoft/easy-800/PT1-signal-smoothing-filter.html

and I still have no clue how to use it in my particular situation - can you help a bit :)

Thanks,
John

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