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补偿式微压计的大容器与丝杠以螺旋连接,测量压力前调整旋转标尺和垂直标尺,使其处于零位,调整小容器的高低位置,使反光镜中上下锥尖尽量靠近但不接触。测量时旋转与丝杠相连接的顶盖来移动大容器,调整压力使小容器中的水位恢复初始位置,读取垂直标尺和旋转标尺刻度,以此方法确定大容器的位移变化。由于垂直标尺的分度值为1mm
Compensatory micro-pressure gauge with a screw-type container and screw connected to measure the pressure before adjusting the rotary ruler and vertical ruler, so that it is zero, adjust the height of the small container so that the upper and lower mirror cone tip as close as possible but do not touch. When measuring, rotate the cap connected with the screw to move the large container, adjust the pressure to restore the water level in the small container to the initial position, read the vertical scale and rotating scale scale, and determine the displacement of the large container in this way. As the vertical scale sub-value of 1mm