EVALUATION OF THE UNCERTAINTY OF GAS FLOW MEASUREMENTS BY A CLEARANCE-SEALED PISTON PROVER

• Abstract:

  A piston prover measures the flow rate by determining the time interval that a piston needs to pass a known volume of gas at a defined pressure and a temperature. The evaluation of the calibration and measurement capabilities of the clearance-sealed realization of the piston prover is presented. A systematic analysis of the uncertainty covers the components due to the gas density, dimensional and time measurements, the leakage flow, the density correction factor and the repeatability.
• Keywords:

  piston prover, gas, mass flow rate, measurement uncertainty, CMC
• Download:

  IMEKO-WC-2015-TC9-210.pdf
• DOI:

  _unreg_wc-2015.210

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