水平仪是安装机器設备时测量表面水平度的主要工具。它在經过长时间的使用以后,由于磨損不均勻的結果,就使气泡和底平面的位置产生了一定的誤差。这样,在使用时,水泡移动的位置,就不一定表示被测表面真实的不平情况。消除水平仪的这种誤差,一般有如下两种方法:1)事先将水平仪进行修理和校正;2)在使用水平仪时来进行校正。第一种方法最理想, The level meter is the main tool for measuring the level of the surface when installing machinery and equipment. After a long period of use, it causes some errors in the position of the bubble and the bottom plane due to uneven wear. In this way, the position where the blisters move when used does not necessarily mean the true unevenness of the surface under test. There are two general methods to eliminate this kind of error of spirit level: 1) Repair and correct the spirit level in advance; 2) Use the spirit level to carry on the correction. The first method is the best,