ISO 17123-4:2012 PDF

Scope: This part of ISO 17123 specifies field procedures to be adopted when determining and evaluating the precision (repeatability) of electro-optical distance meters (EDM instruments) and their ancillary equipment when used in building and surveying measurements. This part of ISO 17123 is applicable to reflector-type EDM instruments only and is not designed to determine the precision of non-prism EDM types. 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 part of ISO 17123 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 parameters. Therefore we differentiate between different measures of accuracy and objectives in testing, like repeatability, reproducibility (e.g. between day repeatability), and of course a thorough assessment of all possible error sources, as prescribed by ISO/IEC Guide 98-3 and by ISO 17123-1. These field procedures have been developed specifically for in situ applications without the need for special ancillary equipment and are purposefully designed to minimize atmospheric influences.

ISO 17123-4:2012 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
ISO/IEC Guide 98-3 Uncertainty of measurement - Guide to the expression of uncertainty in measurement (GUM:1995). Extension to any number of output quantities
ISO/IEC Guide 99

2012 ISO 17123-4:2012 Optics and optical instruments - Field procedures for testing geodetic and surveying instruments - Part 4: Electro-optical distance meters (EDM measurements to reflectors)
2001 ISO 17123-4:2001 Optics and optical instruments - Field procedures for testing geodetic and surveying instruments - Part 4: Electro-optical distance meters (EDM instruments)