9

Maintenance of Meter Equipment

Regular calibration is necessary to ensure that a custody transfer meter is measuring the proper delivery volumes and meeting contract requirements. The frequency and type of maintenance tests are usually determined in the contract, and the equipment that is used to test the meter must be approved and agreed upon. The best throughput test is one that can be run directly in series with a prover. Maintenance budgets are often cut in a bid to increase profits. This has resulted in less control over the quality of gas transported and the accuracy of the meters used to measure it. The need for clean meter tubes has been repeatedly demonstrated worldwide, yet it is one of the most common causes of measurement error. ...

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