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PI Datalink Calculation

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Hi,

 

I've got a tank output flow tag which is incremental but due to instrument fault it resets randomly and starts the count from zero. So when i try to get the total flow for a week or a month I get a wrong asnwer. Because there are zeros inbetween I can't use the calculated data with the range mode.

 

Can someone tell me if there is a way to do this in datalink please.

 

Here is a sample set:





05-Sep-13 01:44:05
2.6

05-Sep-13 02:49:05
2.61

05-Sep-13 03:55:05
2.62

05-Sep-13 05:01:05
2.63

05-Sep-13 06:14:05
2.64

05-Sep-13 07:20:05
2.65

05-Sep-13 08:26:05
2.66

05-Sep-13 10:50:05
0

05-Sep-13 11:33:05
0.01

05-Sep-13 12:32:05
0.02

05-Sep-13 13:29:05
0.03

05-Sep-13 14:34:05
0.04

05-Sep-13 17:01:05
0.05

05-Sep-13 18:08:05
0.06

05-Sep-13 19:12:05
0.07

05-Sep-13 20:10:05

0.08




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