标准编号：ISO 12858-1:2014
中文名称：光学和光学仪器 大地测量辅助工具 第1部分：水准标尺
英文名称：Optics and optical instruments — Ancillary devices for geodetic instruments — Part 1: Invar levelling staffs
发布日期：2014-08
标准范围
This part of ISO 12858 specifies the most important requirements of Invar levelling staffs used in geodesyand industry for precise measurement of heights in combination with either an optical-mechanical levelequipped with a parallel plate micrometre, or a digital level of comparable precision.It is applicable to— classical staffs with graduation lines and numbering;— staffs used in digital levelling with code patterns.NOTE The measurement uncertainty of the height differences depends on a multitude of influencing factorsof the whole measuring system including the levelling instruments.This part of ISO 12858 is not applicable to the detailed design and construction of Invar levelling staffs(e.g. materials, handles, fixing points for the struts, fixing of the Invar strip and of the circular level),which may be selected by the manufacturer as appropriate.
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