Faulty measurement detection summary

Information pertaining to faulty measurements is presented in the AVEVA Production Accounting GUI in a pane to the left of the main drawing window if you choose the Run > Show Gross Error List menu item. The information includes a faulty measurement list in descending order by gross error size.

Figure: Example of Gross Error Status

The Flow_Flag values in Gross Error Status, as written out, defines whether or not the named stream can and should be considered to have a faulty measurement.

Configuration

In the software interface, you can define whether the measurements for a given tank or stream should be candidates for being considered to be gross errors. This configuration is done by the radio buttons in the User Defined Gross Error Status frame on the Object Details dialog box on the Information tab. The information about whether or not a given stream should be allowed to be treated as a gross error is passed from the GUI to the DR Solver.

By default, each flow’s faultiness is determined by AVEVA Production Accounting automatically. This is the System Detect Gross Error setting on the Information tab of the Object Details dialog box. For flows with this default setting, no special information is passed by the AVEVA Production Accounting GUI to DR Solver.

The other two choices you can pick on that dialog box are User Define as Not Gross Error and User Define as Gross Error.

• If the file shows a flow as having NGS (Not Gross Error) in the Flow_Flag Column, faulty measurement detection should never consider this stream to have a measurement that is a gross error. The ability to specify in the AVEVA Production Accounting GUI that a given flow’s measurement should never be deemed to be a gross error is very useful if you know that the measured value of this stream is normally accurate.

• If the file shows a flow as having GS (Gross Error) in the Flow_Flag Column, faulty measurement detection will be forced to always consider this measurement to be a gross error, meaning that it is essentially treated as unmeasured. The ability to specify in the AVEVA Production Accounting GUI that a given flow’s measurement should always be deemed to be a gross error is useful if you know that the measured value of this stream is currently always wrong for some reason, generally temporary.