Bell Prover definition

Bell Prover means a cylindrical metal tank open at the top and nearly filled with liquid, in which a smaller calibrated cylindrical tank called the bell, open at the bottom and having a dome-shaped top, can be raised or lowered. As the operator raises (negative pressure) or lowers (positive pressure) the bell, the bell will displace a known volume of air.
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Bell Prover means a device that measures the volume of a gas using a calibrated bell placed in a bath of oil or water.
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Examples of Bell Prover in a sentence

  • Nevertheless, it was assumed that the manufacturer’s calibration curve is accurate.Flow to RotameterFlow to RotameterFigure 7-11: Bell prover.45 40 35 Bell Prover Flow (standard lpm)30 25 20 15 10 5 00 5 10 15 20 25 30 35 40 45Rotameter Flow (standard lpm)Figure 7-12: Rotameter calibration.

  • In this figure the prover is the Primary Bell Prover located in Ottawa, however other alternative traceability chains are acceptable.

  • Mattingly “NIST Calibration Services for Gas Flow Meters: Piston Prover and Bell Prover Gas Flow Facilities,” NIST SP 250-49 (Gaithersburg, MD: NIST 1998).

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