OSIsoft: Totalize and Integrate with the PI Calculated Data function (PI DL 2013 Excel Add-in)

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[00:02] What is 'Totalization'?
[02:00] Add a PI Totalization Calculation
[03:02] Why is my PI Totalization incorrect?
[04:06] Add a PI Totalization Calculation with a Conversion Factor
[04:53] Add a PI Totalization Calculation with a time interval
[06:14] Speed up your spreadsheet by clearing raw data

Take and integral (or 'total') of timeseries data with the PI Calculated Data function.

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I was trying to match the summation of the daily values you presented and apparently it is short by 234.50 from the total in a week (t-7d). Could you please explain why? Is it more accurate to get a total by a large time frame? If it's getting area under the curve the result must be the same since you're just chopping the curve's area underneath to chunks.

jeremiahcayondong