Development of Pressure Standard up to 1 GPa using a Precise Pressure Multiplier

摘要

The pressure standard up to 1 GPa using a precise pressure multiplier and a pressure balance has been developed. The multiplying ratio of the pressure multiplier, which is the ratio of high pressure to low pressure, is about 10. The pressure multiplier has low and high pressure ports and is capable of generating pressure of 1 GPa at the high pressure port when pressure of 100 MPa is applied to the low pressure port. The pressure for the low pressure port can be applied accurately using a pressure balance. The multiplying ratio of the multiplier was precisely measured as a function of pressure by applying known pressures to both the ports. Using the multiplying ratio measured, the pressure generated at the high pressure port was calculated up to 1 GPa. In this paper, the methods for evaluating the multiplying ratio of the multiplier and for calculating the pressure generated using the pressure multiplier up to 1 GPa with its uncertainty are described in detail. Also, the characteristics of some pressure transducers evaluated using the pressure standard developed are shown.