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Friday, September 23, 2011

Telvent.SE.SWGasQARules - QA rule to check for Excess Flow Valve

The Telvent.SE.SWGasQARules contains a QA rule that checks for the necessity of an Excess Flow Valve (EFV).  It was desgined to work on SW Gas data with minimal configuration (the EXCESSFLOWVALVE model name needs to be added and the QA rule assigned to Service).  The idea with the QA rule was to check if an EFV valve is required using the following logic:

1 - If the Service being QA'ed does not branch (meaning that there is not a three way intersection with all three lines being service) then you must have an Excess Flow Valve present.  In this case, a QA error is generated.  In this, the most simple negative case, you typically just see a single service line feeding a house without a EFV
2- A single service line with an EFV is OK
3 - A branched service line without an EFV is OK
4 - A branched service line with an EFV results in a QA Error (which is described as a warning in the QA/QC tab).

CONFIGURATION -

  • RegX the .dll
  • Add model name EXCESSFLOWVALVE
  • Verify that SERVICEPOINT uniquely identifies MeterSetting (e.g. Riser) as the only feature class.  Note that this may cause problems with Minerville data or other geodatabases where there is an electric dataset which has a ServicePoint feature class. 
  • Verify that the SERVICE model name exists on the Service feature class. 
  • Add the QA rule to the Service Line - It is name Telvent.SE.SWGasQA or something like that...it might have the word EFV in it too. 

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