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PI Datalink Filtering Expression

Question asked by david.tolson on Apr 17, 2020

Hello, I am trying to write an expression to filter some pi data using the calculated function in PI Datalink. I am familar with basic expressions like average only if flow is above x. I am looking to write an expression that displays the daily average fan speed when above 20% and then use the time filter function to narrow that down to only on days when the fan speed was about 1% for 12 hours. Just a rough example. Thanks. 

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