【作者】 徐婕； 李得天； 郭美如； 赵光平；

【Author】 XU Jie,LI De-tian,GUO Mei-ru,ZHAO Guang-ping (Lanzhou Institute of Physics,Lanzhou 730000,China)

【机构】 兰州物理研究所；

【摘要】 静态膨胀法真空标准是真空计量的基础标准,其精度在很大程度上取决于容积比测量的精度。选用一台高压力气体活塞压力计测量膨胀前气体的压力;利用电容薄膜真空计作为比较器,用一台低压力数字式气体活塞压力计测量膨胀后气体的压力;对静态膨胀法真空标准的容积比进行了测定,并对测量结果进行了不确定度的评定。更多还原

【Abstract】 The static expansion vacuum standard is a primary vacuum standard.Its measurement precision mainly depends on the precision of volume ratio measurement.The pressure of gas before and after expansion were measured by a higher-pressure piston gauge and a lower-pressure digital piston gauge respectively,but the pressure after expansion was measured through a CDG(1.33kPa FS) as the comparator.By the above method,the volume ratios were measured and the combined standard uncertainties were analyzed.更多还原