PG7601气体活塞压力计期间核查方法

本文研究了PG7601气体活塞压力计的期间核查方法,从选择核查标准、确定核查参数、处理核查数据、分析核查结果几个方面阐述了PG7601的期间核查方法。不同于以往的单一核查气压量值,该方法不但核查活塞压力计气压量值是否准确可靠,还核查了活塞压力计有效面积值。计算并比较了PG7601在各个气压测试点气压误差值的绝对值与两活塞压力计在对应点上的扩展不确定度的方和根,更为准确有效地核查了PG7601气体活塞压力计工作状态,为气体活塞式压力计的期间核查提供更为科学有效的核查方式。

Period Verification Method for PG7601 Gas Piston Gauges

This paper studies the period verification method for the PG7601 gas piston gauges,and elaborates the period verification method from the aspects of selecting the verification standards,determining the verification parameters,processing the verification data and analyzing the verification results.Unlike a single verification of pressure value,this method not only checks whether the pressure value is accurate and reliable,but also checks the working state of PG7601 more effectively and accurately by checking the effective area of the piston.The absolute value of the pressure error of PG7601 at each gas pressure test point is calculated and compared with the square and root of the expanded uncertainty of the two piston pressure gauges at the corresponding points.This period verification method provides a more scientific and effective way to check the working state of gas piston gauges.