规定了在测定和评估用于测量目的的光学水准仪的精度时所采用的试验程序。当在建筑施工中使用光学水准仪进行测量、检查和符合性测量以及获取精度数据时，给出的程序适用。

Specifies test procedures to be adopted when determining and assessing the accuracy in use of optical levelling instruments for measuring purposes. The procedures given apply when the optical levelling instruments are used in building construction for surveying, check and compliance measurements and for obtaining accuracy data.