Table of Contents
TABLEOFCONTENTS
DISCLAIMERSANDCOPYRIGHT
ACKNOWLEDGMENTS
ABSTRACT
1SONICNOZZLETHEORY
1.1DefinitionofaSonicNozzleElement
1.2SonicNozzleDevelopmentandtheNeedforItsUse
1.3SonicNozzleDesign
1.4TheToroidalSonicNozzleDesign
1.5NozzleFlowCalculations
2APPLICATIONSOFSONICFLOWNOZZLES
2.1CalibrationMethodsofSonicFlowNozzles
2.2BellProverCalibrationofSonicFlowNozzles
2.3VariousApplicationsfortheCalibratedSonicNozzle
2.4SonicNozzleProvingofGasMeters-PositivePressure
VersusAtmosphericPressureProving
2.5TheSonicNozzleAsaGasMeterProvingDevice
3THESONICNOZZLEPROVERFORTESTINGGASMETERS
3.1TheSonicNozzleArray
3.2MeasurementInstrumentation
3.3ProverFlowPathandVacuumSource
3.4OverallProverConstruction
3.5MeterVolumeMeasurement
3.6MeterHandlingandTestingFeatures
3.7TheProverControlSystem
3.8HumanInterfacewiththeProver
3.9SafetyFeatures
4GENERALOPERATIONOFTHESONICNOZZLEPROVER
4.1GasMeterProvingandTestingOperations
4.2SavingofMeterTestData
4.3Diagnostics
5MAINTENANCEANDCALIBRATIONOFTHESONICNOZZLEPROVER
5.1SuggestedMaintenanceandServiceSchedule
5.2CalibrationofSensorsandInstrumentation
6RECERTIFICATIONOFSONICNOZZLEPROVERS
6.1CertificationoftheMasterBellProver
6.2TheBellInterfaceProcedure
6.3AcceptanceoftheBellInterfaceMethod
7COMMONTROUBLESHOOTINGCONCERNS
8SUMMARY
9REFERENCES Abstract
The sonic nozzle prover uses venturi-type critical flow nozzles as the means to determine actual gas volume passed through a meter under test. The prover can marry gas meter performance with local meter characteristics (meter type, reasons for removal or test, and meter location) and forward this information to a utility database or network.
