The Manometry Tongzhu Static Calibration System

The current plastic pressure-measuring calibration in our country has been using the Soviet Union's calibration method and technical equipment since our country was built. It is backward in technical level and has not form a complete plastic pressure-measuring calibration and quality transfer system yet.The paper has got a conclusion that "standard" copper cylinder has an important position in quality transfer system through researching the traceability of relevant equipments and pressure-measuring components in static calibration system. So the "standard" copper cylinders should be researched in depth.Least square fitting method is used to got the second order polynomial fitting curves of more than ten batches pressure-measuring copper cylinders in three types and five batches "standard " copper cylinders.The consistency of several batches in one type is analysed and the pressure sensitivity of each batches is calculated.The source of pressure-measuring copper cylinders' uncertainty has been analysed.The breakthrough point of "standard" copper cylinders' criterion is found through it.Several indexes to be restricted are got to copper cylinders' criterion made.The criterion of "standard" copper cylinders is made through processing a large number of "standard" copper cylinders' experimental data.In order to verify the reasonableness of the criterion,more than ten batches' copper cylinders' in three types are analysed to prove that the "standard" copper cylinders' criteria is available.The method of "standard" copper cylinders' table making is researched.In order to test the "standard" copper cylinders' pressure comparison table made by a small "standard" copper cylinders' sample can reflect the characteristic of "standard" copper cylinders' collectivity of a certain batch.The static calibration experiment is doing with three small samples randomly selected from a certain "standard" copper cylinders' batch. The data got from the experiment are used to make static pressure comparison table.The pressure and pressure error are calculated according to the three "standard" copper cylinders' pressure comparison table.Consistency of "standard" copper cylinders' table made is proved through testing the pressure error in a cetain range that is known before."Standard" copper cylinders' measurement assurance program is discussed primarily.