EN ISO 25178-71:2017

SLOVENSKI STANDARD
01-december-2017
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SIST EN ISO 25178-71:2014
6SHFLILNDFLMDJHRPHWULMVNLKYHOLþLQL]GHOND*367HNVWXUDSRYUãLQHUDYQD
GHO6WDQGDUGL]DPHULOQRSURJUDPVNRRSUHPR,62
Geometrical product specifications (GPS) - Surface texture: Areal - Part 71: Software
measurement standards (ISO 25178-71:2017)
Geometrische Produktspezifikation (GPS) - Oberflächenbeschaffenheit: Flächenhaft -
Teil 71: Software-Normale (ISO 25178-71:2017)
Spécification géométrique des produits (GPS) - État de surface: Surfacique - Partie 71:
Étalons logiciels (ISO 25178-71:2017)
Ta slovenski standard je istoveten z: EN ISO 25178-71:2017
ICS:
17.040.20 Lastnosti površin Properties of surfaces
17.040.40 6SHFLILNDFLMDJHRPHWULMVNLK Geometrical Product
YHOLþLQL]GHOND*36 Specification (GPS)
35.080 Programska oprema Software
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 25178-71
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2017
EUROPÄISCHE NORM
ICS 17.040.40 Supersedes EN ISO 25178-71:2012
English Version
Geometrical product specifications (GPS) - Surface texture:
Areal - Part 71: Software measurement standards (ISO
25178-1:2017)
Spécification géométrique des produits (GPS) - État de Geometrische Produktspezifikation (GPS) -
surface: Surfacique - Partie 71: Étalons logiciels (ISO Oberflächenbeschaffenheit: Flächenhaft - Teil 71:
25178-1:2017) Software-Normale (ISO 25178-1:2017)
This European Standard was approved by CEN on 6 August 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 25178-71:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 25178-71:2017) has been prepared by Technical Committee ISO/TC 213
"Dimensional and geometrical product specifications and verification" in collaboration with Technical
Committee CEN/TC 290 “Dimensional and geometrical product specification and verification” the
secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2018, and conflicting national standards shall be
withdrawn at the latest by April 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 25178-71:2012.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 25178-71:2017 has been approved by CEN as EN ISO 25178-71:2017 without any
modification.
INTERNATIONAL ISO
STANDARD 25178-71
Second edition
2017-08
Geometrical product specifications
(GPS) — Surface texture: Areal —
Part 71:
Software measurement standards
Spécification géométrique des produits (GPS) — État de surface:
Surfacique —
Partie 71: Étalons logiciels
Reference number
ISO 25178-71:2017(E)
©
ISO 2017
ISO 25178-71:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
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Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

ISO 25178-71:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Type S software measurement standards . 2
4.1 General . 2
4.2 Type S1, reference data . 3
4.3 Type S2, reference software . 3
5 File format for Type S1 reference data . 3
5.1 General . 3
5.2 Record 1 — Header . 3
5.2.1 General. 3
5.2.2 Version number . 3
5.2.3 Measurement instrument manufacturer's identifier . 4
5.2.4 Original creation date and time . 4
5.2.5 Last modification date and time . 4
5.2.6 Number of points per profile, M . 4
5.2.7 Number of profiles or traces, N . 4
5.2.8 X, Y and Z axis scale factors . 4
5.2.9 Z axis resolution . 4
5.2.10 Compression type . 4
5.2.11 Data type . 4
5.2.12 Checksum type . . 4
5.3 Record 2 — Data area . 5
5.4 Record 3 — Trailer . 5
6 Software measurement standard certificate . 6
Annex A (informative) Examples . 7
Annex B (informative) Relation to the GPS matrix model . 9
Bibliography .11
ISO 25178-71:2017(E)
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 on 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 the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product
specifications and verification.
This second edition cancels and replaces the first edition (ISO 25178-71:2012), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— the definition of 3.7 has been changed;
— Table 1 has been changed.
A list of all parts in the ISO 25178 series can be found on the ISO website.
iv © ISO 2017 – All rights reserved

ISO 25178-71:2017(E)
Introduction
This document is a geometrical product specification (GPS) standard and is to be regarded as a general
GPS standard (see ISO 14638). It influences the chain link G of the chains of standards on profile and
areal surface texture.
The ISO/GPS Masterplan given in ISO 14638 gives an overview of the ISO/GPS system of which this
document is a part. The fundamental rules of ISO/GPS given in ISO 8015 apply to this document and
the default decision rules given in ISO 14253-1 apply to specifications made in accordance with this
document, unless otherwise indicated.
For more detailed information of the relation of this document to the GPS matrix model, see Annex B.
This document is concerned with software gauges (Type S1) and reference software (Type S2). It also
defines the SDF file format for Type S1 software gauges.
The surface data file (SDF) format is already used by the industry, in particular, by instrument
manufacturers and academia. The SDF file format as defined in this document is a standardized sub-set
of the possibilities included in the SDF file format as initially defined in the European Surfstand project
and EUR15178. It is envisaged that the SDF file format could evolve (as more experience in its usage and
future requirements are identified) later in a version 2.0 with additional fields and possibilities.
INTERNATIONAL STANDARD ISO 25178-71:2017(E)
Geometrical product specifications (GPS) — Surface
texture: Areal —
Part 71:
Software measurement standards
1 Scope
This document defines Type S1 and Type S2 software measurement standards (etalons) for verifying
the software of measuring instruments. It also defines the file format of Type S1 software measurement
standards for the calibration of instruments for the measurement of surface texture by the areal
method as defined in the areal surface texture chain of standards, chain link G.
NOTE Throughout this document, the term “softgauge” is used as a substitute for “software measurement
standard Type S1”.
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 5436-2, Geometrical product specifications (GPS) — Surface texture: Profile method; Measurement
standards — Part 2: Software measurement standards
ISO 16610 (all parts), Geometrical product specifications (GPS) — Filtration
ISO 17450-2, Geometrical product specifications (GPS) — General concepts — Part 2: Basic tenets,
specifications, operators, uncertainties and ambiguities
ISO 25178-2, Geometrical product specifications (GPS) — Surface texture: Areal — Part 2: Terms, definitions
and surface texture parameters
ISO 25178-3, Geometrical product specifications (GPS) — Surface texture: Areal — Part 3: Specification
operators
ISO/IEC Guide 98-1, Uncertainty of measurement — Part 1: Introduction to the expression of uncertainty
in measurement
ISO/IEC Guide 99, International vocabulary of metrology — Basic and general concepts and associated
terms (VIM)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5436-2, ISO 16610 (all parts),
ISO 17450-2, ISO 25178-2, ISO 25178-3, ISO/IEC Guide 98-1 and ISO/IEC Guide 99 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
ISO 25178-71:2017(E)
3.1
software measurement standard
reference data or reference software intended to reproduce the value of a measurand with known
specification uncertainty in order to verify the software used to calculate the value of a measurand
3.2
CHAR[n]
array of n ASCII characters
3.3
BYTE
1-byte (8-bit) representation of an ASCII character
3.4
UINT16
2-byte representation of an unsigned integer
Note 1 to entry: Unsigned integers have a minimum value of 0 and a maximum value of 65 535.
Note 2 to entry: The less significant bytes are stored in lower memory addresses; the more significant bytes are
stored in higher memory addresses.
3.5
INT16
2-byte representation of a signed integer
Note 1 to entry: Short integers have a minimum value of −32 768 and a maximum value of 32 767.
Note 2 to entry: The less significant bytes are stored in lower memory addresses; the more significant bytes are
stored in h
...