高压环道气体流量标准装置

介绍了中国计量科学研究院2014年建成的高压环道气体流量装置,并对其不确定度进行了分析。高压环道气体流量工作标准装置采用4台涡轮流量计作为标准表,具备2.5 MPa、1600 m~3/h的测量能力。涡轮流量计标准表使用原位校准及"绝压+差压"的压力测量方式。装置的扩展不确定度为0.21%(k=2)。

The Close Loop Standard Facility of High Pressure Gas Flow

The high pressure close loop gas flow standard facility in National Insititute of Metrology is discribed,which is constructed in 2014.The introduction and uncertainty analysis of the facility was investigated.With 4 sets of turbine meters as the master meters,the maximum flowrate could be 1600 m3/h at 2.5 MPa for the high pressure close loop working gas flow standard.The expanded uncertainty is 0.21％ (k =2).The uncertainty of the facility realization was guaranteed by the calibration of master flowmeters in original position and the pressure measurement method with absolute pressure transmitters plus differential pressure transmitters.