Design of PC-based quantitative split charging device for hydrogen isotope elemental gases

A quantitative split charging device for hydrogen isotope elemental gases in the operation ranges of 10−5 Pa − 6 bar, 15-40 °C, and 10-500 sccm, controlled by a personal computer (PC) on the workbench of LabVIEW software, was carefully designed and constructed. In the device, volumetric charging mode and flow-controller charging mode can be adopted according to the molar quantity of split charging. The leakage rate and the quantitative split charging accuracy of the set-up were evaluated systemically. According to the experimental results of quantitative split charging from our device and mass comparator, this apparatus is well designed and assembled, and can guarantee 0.001 g quantitative split charging accuracy in the two charging modes.