engleski

Upgrading of a Bell Prover

Bell provers have a wide usage for calibrating various types of flow meters by timing the bell ascendance. They are often used as a working standard. Known area of the bell along with measured displacement of the bell produce, with some measurement uncertainty, volume generated by the bell. This volume with measured time gives the flow generated by the bell. The temperature and the pressure of the gas in the bell are not constant. Further more the temperature and the pressure at the flow meter are not equal to those in the bell due to losses in pipes. Because of that it is imperative to measure all of them. When those measurands are stored in database entire measurement can be analyzed at referent conditions. In order to automate measurements with the bell prover, to improve the measurement uncertainty of the results, and to obtain some additional quantities like velocity and acceleration of the bell, computerized measurement equipment has been installed on the bell prover.

bell prover; flow measurement

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