SIST EN ISO 25178-71:2017

Geometrical product specifications (GPS) - Surface texture: Areal - Part 71: Software measurement standards (ISO 25178-71:2017)

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”.

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)

L'ISO 25178-71:2017 définit les étalons logiciels de Types S1 et S2 qui permettent de vérifier les logiciels des instruments de mesure. Il définit également le format de fichier des étalons logiciels de Type S1 utilisés pour l'étalonnage des instruments de mesure d'état de surface, conformément à la méthode surfacique telle que définie dans le maillon G de la chaîne de normes sur l'état de surface surfacique.
NOTE       Dans l'ISO 25178-71:2017, le terme «étalon logiciel» désigne un «étalon logiciel de Type S1».

Specifikacija geometrijskih veličin izdelka (GPS) - Tekstura površine: ravna - 71. del: Standardi za merilno programsko opremo (ISO 25178-71:2017)

Ta dokument določa standarde za merilno programsko opremo tipov S1 in S2 (etalon) za preverjanje programske opreme merilnih instrumentov. Določa tudi obliko zapisa datoteke standardov za merilno programsko opremo tipa S1 za kalibracijo instrumentov, ki se uporabljajo za merjenje teksture površine s ploskovno metodo, ki jo določa skupina standardov za ploskovno površinsko teksturo, člen verige G.
OPOMBA: V tem dokumentu se za izraz »standard za merilno programsko opremo tipa S1« uporablja izraz »programski merilnik«.

General Information

• Status: Published
• Public Enquiry End Date: 29-Sep-2015
• Publication Date: 07-Nov-2017
• ICS: 17.040.20 - Properties of surfaces
• ICS: 17.040.40 - Geometrical Product Specification (GPS)
• ICS: 35.080 - Software
• Technical Committee: ISEL - Mechanical elements
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 19-Oct-2017
• Due Date: 24-Dec-2017
• Completion Date: 08-Nov-2017
• Ref Project: EN ISO 25178-71:2017 - Geometrical product specifications (GPS) - Surface texture: Areal - Part 71: Software measurement standards (ISO 25178-1:2017)

Relations

• Revised: SIST EN ISO 25178-71:2014 - Geometrical product specifications (GPS) - Surface texture: Areal - Part 7: Software measurement standards (ISO 25178-71:2012)
• Effective Date: 01-Sep-2015
• Replaces: SIST EN ISO 25178-71:2014 - Geometrical product specifications (GPS) - Surface texture: Areal - Part 7: Software measurement standards (ISO 25178-71:2012)
• Effective Date: 18-Oct-2017
• Replaces: SIST EN ISO 25178-71:2014 - Geometrical product specifications (GPS) - Surface texture: Areal - Part 7: Software measurement standards (ISO 25178-71:2012)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 25178-71:2017
01-december-2017
1DGRPHãþD
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
SIST EN ISO 25178-71:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 25178-71:2017

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SIST EN ISO 25178-71:2017


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.

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SIST EN ISO 25178-71:2017
EN ISO 25178-71:2017 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 25178-71:2017
EN ISO 25178-71:2017 (E)
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.
3

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SIST EN ISO 25178-71:2017

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SIST EN ISO 25178-71:2017
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

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SIST EN ISO 25178-71:2017
ISO 25178-71:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© 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.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2017 – All rights reserved

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SIST EN ISO 25178-71:2017
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 2017 – All rights reserved iii

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SIST EN ISO 25178-71:2017
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

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SIST EN ISO 25178-71:2017
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.
© ISO 2017 – All rights reserved v

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SIST EN ISO 25178-71:2017

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SIST EN ISO 25178-71:2017
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 2017 – All rights reserved 1

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SIST EN ISO 25178-71:2017
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
...

SLOVENSKI STANDARD
oSIST prEN ISO 25178-71:2015
01-september-2015
6SHFLILNDFLMDJHRPHWULMVNLKYHOLþLQL]GHOND*367HNVWXUDSRYUãLQHUDYQD
GHO6WDQGDUGL]DPHULOQRSURJUDPVNRRSUHPR,62',6
Geometrical product specifications (GPS) - Surface texture: Areal - Part 71: Software
measurement standards (ISO/DIS 25178-1:2015)
Geometrische Produktspezifikation (GPS) - Oberflächenbeschaffenheit: Flächenhaft -
Teil 71: Software-Normale (ISO/DIS 25178-1:2015)
Spécification géométrique des produits (GPS) - État de surface: Surfacique - Partie 71:
Étalons logiciels (ISO/DIS 25178-1:2015)
Ta slovenski standard je istoveten z: prEN ISO 25178-71 rev
ICS:
17.040.20 Lastnosti površin Properties of surfaces
17.040.30 Merila Measuring instruments
oSIST prEN ISO 25178-71:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 25178-71:2015

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oSIST prEN ISO 25178-71:2015
DRAFT INTERNATIONAL STANDARD
ISO/DIS 25178-71
ISO/TC 213 Secretariat: DS
Voting begins on: Voting terminates on:
2015-06-11 2015-09-11
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
ICS: 17.040.20
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for
Standardization (ISO), and processed under the ISO lead mode of collaboration
as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel five month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments
received, will be submitted to a parallel two-month approval vote in ISO and
THIS DOCUMENT IS A DRAFT CIRCULATED
formal vote in CEN.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
composition will be undertaken at publication stage.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 25178-71:2015(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2015

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oSIST prEN ISO 25178-71:2015
ISO/DIS 25178-71:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015
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.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2015 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 25178-71:2015
ISO/DIS 25178-71:2015(E)

Contents Page
Foreword .iv
Introduction .vi
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 . 2
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 Version number . 3
5.2.2 Measurement instrument manufacturer’s identifier . 3
5.2.3 Original creation date and time . 3
5.2.4 Last modification date and time . 4
5.2.5 Number of points per profile, M .4
5.2.6 Number of profiles or traces, N .4
5.2.7 X, Y and Z axis scale factors . 4
5.2.8 Z axis resolution . 4
5.2.9 Compression type . 4
5.2.10 Data type . 4
5.2.11 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 .10
Bibliography .12
© ISO 2015 – All rights reserved iii

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oSIST prEN ISO 25178-71:2015
ISO/DIS 25178-71:2015(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. 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. 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 meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 213, Dimensional and geometrical product
specifications and verification.
This second edition of ISO 25178-71 cancels and replaces the first edition (ISO 25178-71:2012) which
has been technically revised. Changes (corrections) have been made to (3.7) DOUBLE Note 1 to entry
and in Table 1 some ASCII Format Field names have been changed (corrected).
ISO 25178 consists of the following parts, under the general title Geometrical product specifications (GPS)
— Surface texture: Areal:
— Part 2: Terms, definitions and surface texture parameters
— Part 3: Specification operators
— Part 6: Classification of methods for measuring surface texture
— Part 70: Physical measurement standards
— Part 71: Software measurement standards
— Part 601: Nominal characteristics of contact (stylus) instruments
— Part 602: Nominal characteristics of non-contact (confocal chromatic probe) instruments
— Part 603: Nominal characteristics of non-contact (phase-shifting interferometric microscopy) instruments
— Part 604: Nominal characteristics of non-contact (coherence scanning interferometry) instruments
— Part 605: Nominal characteristics of non-contact (point autofocus probe) instruments
— Part 701: Calibration and measurement standards for contact (stylus) instruments
The following parts are under preparation:
— Part 1: Indication of surface texture
iv © ISO 2015 – All rights reserved

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oSIST prEN ISO 25178-71:2015
ISO/DIS 25178-71:2015(E)

— Part 72: XML file format x3p
— Part 606: Nominal characteristics of non-contact (focus variation) instruments
© ISO 2015 – All rights reserved v

---------------------- Page: 7 ----------------------
oSIST prEN ISO 25178-71:2015
ISO/DIS 25178-71:2015(E)

Introduction
This part of ISO 25178 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 surface texture.
The ISO/GPS Matrix model 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 standard to the GPS matrix model, see Annex B.
This part of ISO 25178 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 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.
vi © ISO 2015 – All rights reserved

---------------------- Page: 8 ----------------------
oSIST prEN ISO 25178-71:2015
DRAFT INTERNATIONAL STANDARD ISO/DIS 25178-71:2015(E)
Geometrical product specifications (GPS) — Surface
texture: Areal —
Part 71:
Software measurement standards
1 Scope
This part of ISO 25178 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 6.
NOTE Throughout this part of ISO 25178, the term “softgauge” is used as a substitute for “software
measurement standard Type S1”.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 5436-2:2001, Geometrical Product Specifications (GPS) — Surface texture: Profile method; Measurement
standards — Part 2: Software measurement standards
ISO 17450-2:2012, 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/IEC Guide 98-1:2009, Uncertainty of measurement — Part 1: Introduction to the expression of
uncertainty in measurement
ISO/IEC Guide 99:2007, International vocabulary of metrology — Basic and general concepts and
associated terms (VIM)
3 Terms and definitions
For the purpose of this document, the terms and definitions in ISO 25178-2, ISO 5436-2:2001, ISO 17250-2,
ISO/IEC Guide 98-1 and ISO/IEC Guide 99, and the following apply.
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
© ISO 2015 – All rights reserved 1

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oSIST prEN ISO 25178-71:2015
ISO/DIS 25178-71:2015(E)

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 higher memory addresses.
3.6
INT32
4-byte representation of a signed integer
Note 1 to entry: Long integers have a minimum value of −2 147 483 648 and a maximum value of [phone].
Note 2 to entry: The less significant bytes are stored in lower memory addresses; the more significant bytes are
stored in higher memory addresses.
3.7
DOUBLE
8-byte representation consisting of a sign bit, an 11-bit binary exponent, and a 52-bit mantissa, plus the
implied high-order 1 bit
−52 1 023
Note 1 to entry: Normalized double precision float have a range of ± (1+(1–2 ))∙2
308. 1 023
approximately ± 1,797 693 134 862 315 7e The smallest nonzero value is −2 ≈∙2 1023 ± 2,225 0738
−308
585 072 014e
Note 2 to entry: The less signific
...