双活塞式压力计准确度等级的确定

Determination of Accuracy of Dual Range Piston Gauges

双活塞式压力计基于不同结构可分为双活塞式压力真空计和双量程活塞式压力计两种。针对后者的结构特点,分析两套活塞系统共用一套砝码的问题,根据活塞的参数以及专用砝码质量计算出标称值下的实际压力值。本研究根据不同压力量程段来划分活塞式压力计的准确度等级,实现活塞式压力计的溯源性校准,以保证压力量传中的准确性和一致性。

Based on different structures,the dual range pistons can be divided into dual piston pressure vacuum gauges and dual piston gauges. According to the structural characteristics of the dual piston gauge,we analyzed the case when two piston-cylinder systems used only one set of weights. The actual pressure value under nominal value was calculated according to the quality of the weights and the parameters of the piston. The results show that the accuracy grades can be divided according to the different pressure ranges,to achieve the piston gauge traceability calibration and ensure the accuracy and consistency of pressure field.