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Calibration of pressure balances
(American Institute of Physics Inc., 2023) Hamarat, A.; Yllmaz, R.; Durgut, Y.; Demir, E.
Piston cylinder units known as pressure balances are used as primary and secondary level standards in the field of pressure metrology all over the world. The pressure balances work according to the principle of obtaining the reference pressure value applying force by using mass sets on the piston-cylinder unit whose area is known with high accuracy. Both gas-operated and liquid-operated pressure balances are available. The calibration method of the pressure balances is a comparative method. The balances can also be used for calibrating other pressure balances. A pressure balance consists of a piston that freely rotate in a cylinder. The piston-cylinder unit has a well machined surface called as effective area. The calibration of a pressure balance nearly means determining the effective area of the piston-cylinder unit. The comparison is carried out using the cross-floating procedure which include three different methods like falling rate method, differential gauge method and pressure gauge method. We examined the compatibility of the measurement results in each method with each other in this study. © 2023 Author(s).