ISO 17123-2:2001 PDF

Scope: This part of ISO 17123 specifies field procedures to be adopted when determining and evaluating the precision of levels (spirit levels, compensator levels, digital levels) and their ancillary equipment when used in building and surveying measurements. Primarily, these tests are intended to be field verifications of the suitability of a particular instrument for the immediate task at hand and to satisfy the requirements of other standards. They are not proposed as tests for acceptance or performance evaluations that are more comprehensive in nature. This International Standard can be thought of as one of the first steps in the process of evaluating the uncertainty of a measurement (more specifically a measurand). The uncertainty of a result of a measurement is dependent on a number of factors. These include among others: repeatability, reproducibility (between day repeatability) and a thorough assessment of all possible error sources, as prescribed by the ISO Guide to the expression of uncertainty in measurement (GUM). These field procedures have been developed specifically for in situ applications without the need for special ancillary equipment and are purposely designed to minimize atmospheric influences.

ISO 17123-2:2001 Referenced Document

ISO 17123-1 Optics and optical instruments - Field procedures for testing geodetic and surveying instruments - Part 1: Theory*， 2014-08-01 Update
ISO 3534-1 Statistics — Vocabulary and symbols — Part 1: General statistical terms and terms used in probability
ISO 4463-1 Measurement methods for building; setting-out and measurement; part 1: planning and organization, measuring procedures, acceptance criteria
ISO 7077 Measuring methods for building; General principles and procedures for the verification of dimensional compliance
ISO 7078 Buildings and civil engineering works — Procedures for setting out, measurement and surveying — Vocabulary*， 2020-04-17 Update
ISO 9849 Optics and optical instruments — Geodetic and surveying instruments — Vocabulary*， 2017-07-31 Update

2001 ISO 17123-2:2001 Optics and optical instruments - Field procedures for testing geodetic and surveying instruments - Part 2: Levels