AGA XQ0308 : 2003

TABLE OF CONTENTS
DISCLAIMERS AND COPYRIGHT
ACKNOWLEDGMENTS
ABSTRACT
1 SONIC NOZZLE THEORY
  1.1 Definition of a Sonic Nozzle Element
  1.2 Sonic Nozzle Development and the Need for Its Use
  1.3 Sonic Nozzle Design
  1.4 The Toroidal Sonic Nozzle Design
  1.5 Nozzle Flow Calculations
2 APPLICATIONS OF SONIC FLOW NOZZLES
  2.1 Calibration Methods of Sonic Flow Nozzles
  2.2 Bell Prover Calibration of Sonic Flow Nozzles
  2.3 Various Applications for the Calibrated Sonic Nozzle
  2.4 Sonic Nozzle Proving of Gas Meters - Positive Pressure
      Versus Atmospheric Pressure Proving
  2.5 The Sonic Nozzle As a Gas Meter Proving Device
3 THE SONIC NOZZLE PROVER FOR TESTING GAS METERS
  3.1 The Sonic Nozzle Array
  3.2 Measurement Instrumentation
  3.3 Prover Flow Path and Vacuum Source
  3.4 Overall Prover Construction
  3.5 Meter Volume Measurement
  3.6 Meter Handling and Testing Features
  3.7 The Prover Control System
  3.8 Human Interface with the Prover
  3.9 Safety Features
4 GENERAL OPERATION OF THE SONIC NOZZLE PROVER
  4.1 Gas Meter Proving and Testing Operations
  4.2 Saving of Meter Test Data
  4.3 Diagnostics
5 MAINTENANCE AND CALIBRATION OF THE SONIC NOZZLE PROVER
  5.1 Suggested Maintenance and Service Schedule
  5.2 Calibration of Sensors and Instrumentation
6 RECERTIFICATION OF SONIC NOZZLE PROVERS
  6.1 Certification of the Master Bell Prover
  6.2 The Bell Interface Procedure
  6.3 Acceptance of the Bell Interface Method
7 COMMON TROUBLESHOOTING CONCERNS
8 SUMMARY
9 REFERENCES