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Flows with Negative Reconciled Values

This analysis rule includes the list of flow elements that have negative reconciled value from a Sigmafine mass- or volume-based balance. In a Sigmafine model, a negative flow measurement physically equates to materials flowing in the opposite direction then the intended (positive) direction. Negative reconciled values result from a strong imbalance at the source or destination elements of the transaction that pulls the resultant balancing flow to a negative value.

The following table lists a sample log output for this analysis.

Sample Log

TimeSeverityElementAttributeMessage
7/25/2005 13:22REPORTING FLOWS WITH NEGATIVE RECONCILED VALUE – BASIS = MASS
7/25/2005 13:22ErrorFlowAReconciledMassReconciledMass= -3100lb; Source=NodeA; Destination=NodeB

Analysis Method​

  1. Collect a list of all flow elements in the current Case that satisfy the following criteria:
  • Status Attribute value is IS (In Service).
  • The reconciled value (either by mass or by volume) is negative in the current case.
  1. Write to the log section of the case. Report the violation, flow Element name, and reconciled values.

Configuration Using the Wizard​

The configuration of the Flows with Negative Reconciled Values is a selection of the Post-Reconciliation Gross Error Analysis Rule. You open the window for configuring the test (shown in the following figure) from the General Gross Error Analysis Rule Wizard.

  1. Open the Gross Error Configuration window as described in Configuring - General Gross Error Analysis Rule.

  2. On the Flows tab, select Flows with negative reconciled values.

    A Flows with negative reconciled values - Attributes window opens.Figure 424: Flows with negative reconciled values - Attributes window

  3. Select the measurement basis and the Attributes according to the following table:

    Attributes

    SelectionsDescription
    Measurement BasisSelect mass or volume measurement basis for comparison.
    ReconciledFlow reconciled measurement - default to 'ReconciledMass' or 'ReconciledVolume' depending on mass or volume selection.
    StatusFlow in/out of service status. This defaults to 'ObjectStatus'.

  4. Click OK to finish the configuration.

    The text "CONFIGURED" displays next to the 'Flows with negative reconciled values' selection.

  5. To run this test, see Running the Post Reconciliation Gross Error Analysis.