API MPM CH21.1 : 2013

1 Scope
2 Normative References
3 Descriptions, Definitions, and Symbols
4 Electronic Gas Measurement System Algorithms
5 Audit and Record Requirements
6 Data Availability
7 Commissioning
8 Equipment Verification and Calibration
9 Security and Data Integrity
Annex A (informative) - Rans Methodology for Estimating
        Sampling Frequency and Calculation Algorithm Errors
Annex B (normative) - Averaging Techniques
Annex C (informative) - Correction Methodology
Annex D (normative) - Calculation of Normal Operating
        Range and Percent Fluctuation
Annex E (informative) - Example Flow Computer Variable
        Input Type Testing - Differential Meters
Annex F (informative) - Example Commissioning Checklist
Annex G (informative) - Examples of Configuration
         Log Data
Annex H (informative) - Calculation of Differential
        Pressure "As-Found"
Annex I (informative) - Example of a Redundancy
        Verification Report
Annex J (informative) - Examples of Applying Linear
        Meter Equations
Annex K (informative) - Example of Using DP[IV], DP[Y],
        and a Volumetric Flow Rate Calculator to
        Recalculate a QCP or QTR
Bibliography

Specifies the minimum specifications for electronic gas measurement systems used in the measurement and recording of flow parameters of gaseous phase hydrocarbon and other related fluids for custody transfer applications utilizing industry recognized primary measurement devices.