Uncertainty Modelling of the Reference Pressure Generating with OIML and ASTM Weights in Pressure Balances

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• 作者：Can Ekici
• 关键词：Pressure balance ; Reference pressure ; OIML weights ; ASTM weights ; Uncertainty
• 刊名：MAPAN
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：31
• 期：4
• 页码：265-273
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Measurement Science and Instrumentation; Theoretical, Mathematical and Computational Physics; Mathematical Methods in Physics; Numerical and Computational Physics, Simulation;
• 出版者：Springer India
• ISSN：0974-9853
• 卷排序：31

文摘

A pressure balance is a combined with a piston-cylinder unit and a system for the application of a vertical load on the piston. Pressure balances are primary measuring systems those measure pressure in terms of force per unit area. Reference pressure can be generated by a pressure balance. There are many parameters to calculate reference pressure, such as piston’s area, linear deformation of piston and cylinder, measuring temperature, mass, local gravity, surface tension of measuring liquid… All of these parameters have got measurement uncertainty, effects of these uncertainty components must be added to the uncertainty budget of reference pressure. In this study, the uncertainty model function of reference pressure is derived. And the uncertainty model function is rearranged. If the masses of pressure balance are calibrated according to the OIML R-111 or ASTM E-617 guides, the uncertainty model function that is given in the study can be used directly to calculate uncertainty of reference pressure.