1 Scope

2 Normative references

3 Terms and definitions

4 Design characteristics

4.1 General design and nomenclature

4.2 Dimensions

5 Metrological characteristics

5.1 General

5.2 Rated operating conditions

5.3 Reference point

5.4 Test methods

5.5 Partial surface contact error, E (limited by EMPE)

5.6 Shift error, S (limited by SMPE)

5.6.1 General

5.6.2 Shift error — Internal measuring faces

5.6.3 Shift error — Crossed knife-edge internal measuring faces

5.6.4 Shift error — Depth or step measuring faces

5.7 MPE values

5.8 Special cases

6 Determination of conformity to specifications

6.1 General

6.2 Measurement uncertainty

6.3 Decision rule

7 Marking

Annex A (informative) Calibration guidelines for metrological characteristics

Annex B (normative) Default MPE values for metrological characteristics

Annex C (informative) Relation to the GPS matrix model

Bibliography

ISO 13385-1:2019(en)

	International Standard ISO 13385-1
Geometrical product specifications (GPS) — Dimensional measuring equipment — Part 1: Design and metrological characteristics of callipers Spécification géométrique des produits (GPS) — Équipement de mesurage dimensionnel — Partie 1: Caractéristiques de conception et caractéristiques métrologiques des pieds à coulisse Reference number ISO 13385-1:2019(en)	Second edition 2019-08 © ISO 2019

ISO 13385-1:2019(en)

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ISO 13385-1:2019(en)

Contents Page

Foreword

Introduction

1 Scope

2 Normative references

3 Terms and definitions

4 Design characteristics

4.1 General design and nomenclature

4.2 Dimensions

5 Metrological characteristics

5.1 General

5.2 Rated operating conditions

5.3 Reference point

5.4 Test methods

5.5 Partial surface contact error, E (limited by EMPE)

5.6 Shift error, S (limited by SMPE)

5.6.1 General

5.6.2 Shift error — Internal measuring faces

5.6.3 Shift error — Crossed knife-edge internal measuring faces

5.6.4 Shift error — Depth or step measuring faces

5.7 MPE values

5.8 Special cases

6 Determination of conformity to specifications

6.1 General

6.2 Measurement uncertainty

6.3 Decision rule

7 Marking

Annex A (informative) Calibration guidelines for metrological characteristics

Annex B (normative) Default MPE values for metrological characteristics

Annex C (informative) Relation to the GPS matrix model

Bibliography

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 213, Dimensional and geometrical product specifications and verification.

This second edition cancels and replaces the first edition (ISO 13385-1:2011), which has been technically revised.

The main changes compared to the previous edition are as follows:

—

figures have been updated to show more modern technology;

—

general design characteristics have been removed and reference to ISO 14978:2018 included;

—

metrological characteristics have been clarified and modified;

—

requirements for test methods have been included;

—

default values for maximum permissible errors have been added.

A list of all parts in the ISO 13385 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.

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 links F and G of the chain of standards on size and distance in the general GPS matrix (see Annex C).

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; see ISO/TR 14253-6 for additional information on the selection of alternative decision rules.

For more detailed information on the relation of this document to other standards and the GPS matrix model, see Annex C.

ISO 13385-1:2019(en)

International Standard ISO 13385-1:2019(en)

Geometrical product specifications (GPS) — Dimensional measuring equipment —

Part 1:

Design and metrological characteristics of callipers

1 Scope

This document provides the most important design and metrological characteristics of callipers

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with analogue indication: vernier scale or circular scale (dial), and

—

with digital indication: digital display.

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 14253-1, Geometrical product specifications (GPS) — Inspection by measurement of workpieces and measuring equipment — Part 1: Decision rules for verifying conformity or nonconformity with specifications

ISO 14253-5, Geometrical product specifications (GPS) — Inspection by measurement of workpieces and measuring equipment — Part 5: Uncertainty in verification testing of indicating measuring instruments

ISO/TR 14253-6, Geometrical product specifications (GPS) — Inspection by measurement of workpieces and measuring equipment — Part 6: Generalized decision rules for the acceptance and rejection of instruments and workpieces

ISO 14978:2018, Geometrical product specifications (GPS) — General concepts and requirements for GPS measuring equipment

ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)

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 14978 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 https://www.iso.org/obp

—

IEC Electropedia: available at http://www.electropedia.org/

3.1

calliper

measuring instrument which evaluates a dimensional quantity of an internal or external feature on the basis of opposing contact from the movement of a slider with a measuring jaw, moving relative to a measuring scale on a rigid beam and to a fixed jaw

Note 1 to entry: See examples in Figures 1, 2 and 3.

Note 2 to entry: Callipers can be equipped for additional measurements, such as depth and step measurements (see Figures 1 and 2).

Note 3 to entry: The indication can be either analogue (vernier scale or circular scale) or digital.

3.2

measuring face contact

contact between the measuring face and an integral feature of a workpiece

3.2.1

full measuring face contact

contact between the full area of the measuring face and an integral feature of a workpiece

3.2.2

partial measuring face contact

contact between a partial area of the measuring face and an integral feature of a workpiece

3.2.3

measuring face line contact

contact between a line, nominally perpendicular to the length of the jaws, on the measuring face and an integral feature of a workpiece

ISO 13385-1:2019(en)

Bibliography

[1]		ISO 1, Geometrical product specifications (GPS) — Standard reference temperature for the specification of geometrical and dimensional properties
[2]		ISO 3650, Geometrical Product Specifications (GPS) — Length standards — Gauge blocks
[3]		ISO 8015, Geometrical product specifications (GPS) — Fundamentals — Concepts, principles and rules
[4]		ISO 14253-2, Geometrical product specifications (GPS) — Inspection by measurement of workpieces and measuring equipment — Part 2: Guidance for the estimation of uncertainty in GPS measurement, in calibration of measuring equipment and in product verification
[5]		ISO 14638, Geometrical product specifications (GPS) — Matrix model
[6]		ISO/TR 16015, Geometrical product specifications (GPS) — Systematic errors and contributions to measurement uncertainty of length measurement due to thermal influences
[7]		ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories


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