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水平仪是一种精度较高的测角仪器,广泛用于机器制造和设备维修等行业。在使用水平仪测量工件之前,首先要对零位进行调整。所谓水平仪的零位,就是当水平仪处于自然水平位置时,气泡应处于中间两条长分划线的对称位置(气泡两端与长分划线的间距相等),如图1所示。水平仪的零位要求气泡对中间位置的偏移不应超过分度值的1/4(室温20℃)。水平仪的零位是否符合要求,可按下述方
Level is a high precision goniometer, widely used in machinery manufacturing and equipment maintenance and other industries. Before using the spirit level to measure the workpiece, we must first adjust the zero position. The so-called zero level of the spirit level means that when the spirit level is in a natural horizontal position, the bubble should be symmetrical with two long dividing lines in the middle (the spacing between the two ends of the bubble and the long dividing line is equal), as shown in FIG. 1. The zero level of the spirit level requires that the deviation of the bubble from the middle position should not exceed 1/4 of the division value (room temperature 20 ℃). Zero level of the instrument meets the requirements, according to the following party