在压力表检定中,常使用油、水、空气作为介质来传递压力,对压力表进行检定。油、水、空气等统称为流体。如图1所示,在一般压力表检定过程中,由于一般压力表的外壳尺寸不同,造成被检压力表与精密压力表中心轴不在同一高度,即两者之间存在高度差。若设处于较高位置的压力表处的压力为 In the pressure gauge test, often use oil, water, air as a medium to transmit pressure, the pressure gauge for testing. Oil, water, air, etc. collectively referred to as fluid. As shown in Figure 1, in the general pressure gauge verification process, due to the general pressure gauge shell size is different, resulting in the pressure gauge and precision pressure gauge is not at the same center axis, that there is a height difference between the two. If set at a higher position of the pressure gauge at