ISO 17123-6:2022

INTERNATIONAL ISO
STANDARD 17123-6
Third edition
2022-05
Optics and optical instruments —
Field procedures for testing geodetic
and surveying instruments —
Part 6:
Rotating lasers
Optique et instruments d'optique — Méthodes d'essai sur site des
instruments géodésiques et d'observation —
Partie 6: Lasers rotatifs
Reference number
© ISO 2022
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms.2
4.1 Symbols . 2
4.2 Abbreviations . 3
5 General . 3
5.1 Requirements . 3
5.2 Procedure 1: simplified test procedure . 3
5.3 Procedure 2: full test procedure. 4
6 Simplified test procedure . 5
6.1 Configuration of the test field . 5
6.2 Measurements . . 6
6.3 Calculation . 7
7 Full test procedure .8
7.1 Configuration of the test line . 8
7.2 Measurements . 8
7.3 Calculation . 9
7.4 Statistical test . 13
7.4.1 General .13
7.4.2 Question a) . 14
7.4.3 Question b) .15
7.4.4 Question c) . 15
7.4.5 Question d) .15
8 Influence quantities and combined standard uncertainty evaluation (Type A and
Type B) .16
Annex A (informative) Example of the simplified test procedure .17
Annex B (informative) Example of the full test procedure .20
Annex C (informative) Example for the calculation of an uncertainty budget .25
Bibliography .28
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee
SC 6, Geodetic and surveying instruments.
This third edition cancels and replaces the second edition (ISO 17123-6:2012), which has been
technically revised.
The main changes are as follows:
— more flexible configuration of the test line and updating of the mathematical model;
— harmonization of terminology and symbols;
— correction of errors.
A list of all parts in the ISO 17123 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
This document specifies field procedures for adoption when determining and evaluating the uncertainty
of measurement results obtained by geodetic instruments and their ancillary equipment, when used in
building and surveying measuring tasks. Primarily, these tests are intended to be field verifications
of suitability of a particular instrument for the immediate task. They are not proposed as tests for
acceptance or performance evaluations that are more comprehensive in nature.
The definition and concept of uncertainty as a quantitative attribute to the final result of measurement
was developed mainly in the last two decades, even though error analysis has already long been a part
of all measurement sciences. After several stages, the CIPM (Comité International des Poids et Mesures)
referred the task of developing a detailed guide to ISO. Under the responsibility of the ISO Technical
Advisory Group on Metrology (TAG 4), and in conjunction with six worldwide metrology organizations,
a guidance document on the expression of measurement uncertainty was compiled with the objective
of providing rules for use within standardization, calibration, laboratory, accreditation and metrology
services. ISO/IEC Guide 98-3 was first published as the Guide to the Expression of Uncertainty in
Measurement (GUM) in 1995.
With the introduction of uncertainty in measurement in ISO 17123 (all parts), it is intended to finally
provide a uniform, quantitative expression of measurement uncertainty in geodetic metrology with the
aim of meeting the requirements of customers.
ISO 17123 (all parts) provides not only a means of evaluating the precision (experimental standard
deviation) of an instrument, but also a tool for defining an uncertainty budget, which allows for the
summation of all uncertainty components, whether they are random or systematic, to a representative
measure of accuracy, i.e. the combined standard uncertainty.
ISO 17123 (all parts) therefore provides, for each instrument investigated by the procedures, a proposal
for additional, typical influence quantities, which can be expected during practical use. The customer
can estimate, for a specific application, the relevant standard uncertainty components in order to derive
and state the uncertainty of the measuring result.
v
INTERNATIONAL STANDARD ISO 17123-6:2022(E)
Optics and optical instruments — Field procedures for
testing geodetic and surveying instruments —
Part 6:
Rotating lasers
1 Scope
This document specifies field procedures to be adopted when determining and evaluating the precision
(repeatability) of rotating lasers and their ancillary equipment when used in building and surveying
measurements for levelling tasks. 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 document can be considered 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 this document differentiates between different
measures of accuracy and objectives in testing, like repeatability and reproducibility (between-day
repeatability), and of course gives a thorough assessment of all possible error sources, as prescribed by
ISO/IEC Guide 98-3 and 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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
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 enginee
...