SIST EN ISO 14978:2006
(Main)Geometrical Product Specifications (GPS) - General concepts and requirements for GPS measuring equipment (ISO 14978:2006)
Geometrical Product Specifications (GPS) - General concepts and requirements for GPS measuring equipment (ISO 14978:2006)
This International Standard specifies the general requirements, terms and definitions of characteristics of simple GPS measuring equipment, e.g. micrometers, dial gauges, callipers, surface plates, height gauges, gauge blocks, but not necessarily excluding more complicated equipment. It forms the basis for standards defining and describing the design characteristics and metrological characteristics for measuring equipment. It also gives guidance for the development and content of standards for GPS measuring equipment. This International Standard is intended to ease the communication between manufacturer/supplier and customer/user and to make the specification phase of GPS measuring equipment more accurate. This International Standard is also intended as a tool to be used in companies in the process of defining and selecting relevant characteristics for measuring equipment to be used in the quality assurance of measuring processes, i.e. in calibration and in workpiece measurements. This International Standard also includes terms which are frequently used in connection with the characterization of specific measuring equipment.
Geometrische Produktspezifikation (GPS) - Allgemeine Begriffe und Anforderungen für GPS Messeinrichtungen (ISO 14978:2006)
Diese Internationale Norm legt die allgemeinen Anforderungen, Benennungen und Definitionen der Merkmale von einfachen GPS-Messeinrichtungen, z. B. Messschrauben, Messuhren, Messschieber, Prüfplatten, vertikale Längenmessgeräte, Parallelendmaße, fest, aber ohne komplexere Messeinrichtungen auszuschließen. Sie ist die Grundlage für Normen, die Konstruktionsmerkmale und die messtechnischen Merkmale für Messeinrichtungen festlegen und beschreiben. Ferner gibt sie Anleitungen für die Entwicklung und den Inhalt von Normen für GPS-Messeinrichtungen.
Diese Internationale Norm sollte die Verständigung zwischen Hersteller/Lieferant und Abnehmer/Anwender erleichtern, und sollte im Stadium der Beschreibung von GPS-Messeinrichtungen diese genauer gestalten. Sie ist auch als Werkzeug für die Anwendung durch Unternehmen bei der Festlegung und Auswahl von relevanten Merkmalen für eine Messeinrichtung gedacht, die für die Qualitätssicherung von Messprozessen, d. h. für Kalibrierungen und für Messungen an Werkstücken, angewendet werden.
Diese Internationale Norm enthält ferner Benennungen, die häufig zur Beschreibung von speziellen Messeinrichtungen verwendet werden.
Spécification géométrique des produits (GPS) - Concepts et exigences généraux pour les équipements de mesure GPS (ISO 14978:2006)
L'ISO 14978:2006 spécifie les exigences générales, les termes et définitions des caractéristiques des équipements de mesure GPS simples, par exemple les micromètres, comparateurs, pieds à coulisse, marbres, calibres à limites, cales-étalons, sans toutefois exclure des équipements plus complexes. Elle constitue la base des normes destinées à définir et à déterminer les caractéristiques de conception et de fabrication et les caractéristiques métrologiques des équipements de mesure. Elle fournit également des lignes directrices pour l'élaboration et le contenu des normes relatives aux équipements de mesure GPS.
L'ISO 14978:2006 a été établie afin de faciliter la communication entre le fabricant/fournisseur et le client/utilisateur, et clarifier le cahier des charges de spécification des équipements de mesure GPS. Elle constitue également un outil que les sociétés peuvent utiliser pour définir et sélectionner les caractéristiques pertinentes des équipements de mesure utiles pour l'assurance de la qualité des processus de mesure, c'est-à-dire dans les processus d'étalonnage ou de vérification et de mesure des pièces.
L'ISO 14978:2006 comprend les termes fréquemment utilisés en relation avec la caractérisation des équipements de mesure spécifiques.
Specifikacija geometrijskih veličin izdelka (GPS) - Osnove in zahteve za merilno opremo GPS (ISO 14978:2006)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 14978:2006
01-december-2006
6SHFLILNDFLMDJHRPHWULMVNLKYHOLþLQL]GHOND *36 2VQRYHLQ]DKWHYH]DPHULOQR
RSUHPR*36 ,62
Geometrical Product Specifications (GPS) - General concepts and requirements for GPS
measuring equipment (ISO 14978:2006)
Geometrische Produktspezifikation (GPS) - Allgemeine Begriffe und Anforderungen für
GPS Messeinrichtungen (ISO 14978:2006)
Spécification géométrique des produits (GPS) - Concepts et exigences généraux pour
les équipements de mesure GPS (ISO 14978:2006)
Ta slovenski standard je istoveten z: EN ISO 14978:2006
ICS:
17.040.30 Merila Measuring instruments
17.040.40 6SHFLILNDFLMDJHRPHWULMVNLK Geometrical Product
YHOLþLQL]GHOND *36 Specification (GPS)
SIST EN ISO 14978:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 14978:2006
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SIST EN ISO 14978:2006
EUROPEAN STANDARD
EN ISO 14978
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2006
ICS 17.040.30
English Version
Geometrical Product Specifications (GPS) - General concepts
and requirements for GPS measuring equipment (ISO
14978:2006)
Spécification géométrique des produits (GPS) - Concepts Geometrische Produktspezifikation (GPS) - Allgemeine
et exigences généraux pour les équipements de mesure Begriffe und Anforderungen für GPS Messeinrichtungen
GPS (ISO 14978:2006) (ISO 14978:2006)
This European Standard was approved by CEN on 19 June 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14978:2006: E
worldwide for CEN national Members.
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SIST EN ISO 14978:2006
EN ISO 14978:2006 (E)
Foreword
This document (EN ISO 14978:2006) 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 January 2007, and conflicting national
standards shall be withdrawn at the latest by January 2007.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Endorsement notice
The text of ISO 14978:2006 has been approved by CEN as EN ISO 14978:2006 without any
modifications.
2
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SIST EN ISO 14978:2006
INTERNATIONAL ISO
STANDARD 14978
FIrst edition
2006-07-01
Geometrical product specifications
(GPS) — General concepts and
requirements for GPS measuring
equipment
Spécification géométrique des produits (GPS) — Concepts et
exigences généraux pour les équipements de mesure GPS
Reference number
ISO 14978:2006(E)
©
ISO 2006
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SIST EN ISO 14978:2006
ISO 14978:2006(E)
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ii © ISO 2006 – All rights reserved
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SIST EN ISO 14978:2006
ISO 14978:2006(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Abbreviations . 12
5 Design characteristics. 13
5.1 General. 13
5.2 Indicating measuring equipment . 14
5.3 Material measures. 14
6 Metrological characteristics . 15
6.1 General. 15
6.2 Identification, definition and choice of metrological characteristics. 16
6.3 Indicating measuring equipment — identification of general metrological characteristics. 17
6.4 Material measures — Identification of general metrological characteristics. 19
7 Types of presentation and types of specifications for characteristics. 21
7.1 General. 21
7.2 Presentation of characteristic curves — Fixed and floating zero . 21
7.3 Presentation of a characteristic — Statistical . 24
7.4 Specifications for single-value metrological characteristics. 25
7.5 Specification for metrological characteristics defined in a range. 25
7.6 Specification for metrological characteristics defined in a two- or three-dimensional
range . 29
8 Calibration of metrological characteristics. 29
8.1 Manufacturer and supplier of measuring instruments . 29
8.2 User of measuring instruments. 29
8.3 Measurement uncertainty . 29
9 Marking . 30
Annex A (normative) General minimum requirements and guidance for clauses in GPS standards
for specific measuring equipment . 31
Annex B (informative) Data sheet for measuring equipment requirements. 33
Annex C (normative) Relation to the GPS matrix model. 35
Bibliography . 37
© ISO 2006 – All rights reserved iii
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SIST EN ISO 14978:2006
ISO 14978:2006(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 14978 was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product
specifications and verification.
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SIST EN ISO 14978:2006
ISO 14978:2006(E)
Introduction
This International Standard is a geometrical product specification (GPS) standard and is to be regarded as a
global GPS standard (see ISO/TR 14638). It influences chain links 5 and 6 of all chains of standards in the
general GPS matrix.
For more detailed information of the relation of this International Standard to other standards and the GPS
matrix model, see Annex C.
This International Standard contains guidance for writing the standards for specific measuring equipment.
This International Standard is intended to give the user a basic understanding of the use of ISO standards for
GPS measuring equipment. This International Standard presents and defines general concepts to be used in
connection with GPS measuring equipment to avoid multiple repetitions in the ISO standards for specific GPS
measuring equipment. This International Standard is also intended as guidance for the manufacturer to
evaluate and present specifications for characteristics for GPS measurement equipment.
This International Standard should be close at hand when reading and using ISO standards for a specific GPS
measuring equipment.
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SIST EN ISO 14978:2006
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SIST EN ISO 14978:2006
INTERNATIONAL STANDARD ISO 14978:2006(E)
Geometrical product specifications (GPS) — General concepts
and requirements for GPS measuring equipment
1 Scope
This International Standard specifies the general requirements, terms and definitions of characteristics of
simple GPS measuring equipment, e.g. micrometers, dial gauges, callipers, surface plates, height gauges,
gauge blocks, but not necessarily excluding more complicated equipment. It forms the basis for standards
defining and describing the design characteristics and metrological characteristics for measuring equipment. It
also gives guidance for the development and content of standards for GPS measuring equipment.
This International Standard is intended to ease the communication between manufacturer/supplier and
customer/user and to make the specification phase of GPS measuring equipment more accurate. This
International Standard is also intended as a tool to be used in companies in the process of defining and
selecting relevant characteristics for measuring equipment to be used in the quality assurance of measuring
processes, i.e. in calibration and in workpiece measurements.
This International Standard also includes terms which are frequently used in connection with the
characterization of specific measuring equipment.
2 Normative references
The following referenced documents are indispensable for the application 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 1:2002, Geometrical Product Specifications (GPS) — Standard reference temperature for geometrical
product specification and verification
ISO 1101:2004, Geometrical Product Specifications (GPS — Geometrical tolerancing — Tolerances of form,
orientation, location and run-out
1)
ISO 5459:— , Geometrical Product Specifications (GPS) — Geometrical tolerancing — Datums and datum
systems
ISO 14253-1:1998, Geometrical Product Specifications (GPS) — Inspection by measurement of workpieces
and measuring equipment — Part 1: Decision rules for proving conformance or non-conformance with
specifications
ISO/TS 14253-2:1999, Geometrical Product Specifications (GPS) — Inspection by measurement of
workpieces and measuring equipment — Part 2: Guide to the estimation of uncertainty in GPS measurement,
in calibration of measuring equipment and product verification
ISO/TS 17450-2, Geometrical product specifications (GPS) — General concepts — Part 2: Basic tenets,
specifications, operators and uncertainties
International vocabulary of basic and general terms in metrology (VIM), BIPM, IEC, IFCC, ISO, IUPAC, IUPAP,
1987
1) To be published. (Revision of ISO 5459:1981.)
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SIST EN ISO 14978:2006
ISO 14978:2006(E)
International vocabulary of basic and general terms in metrology (VIM), BIPM, IEC, IFCC, ISO, IUPAC, IUPAP,
1993
Guide to the expression of uncertainty in measurement (GUM), BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML,
2)
1993
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14253-1, ISO/TS 14253-2,
ISO/TS 17450-2, VIM and GUM and the following apply.
3.1
measuring equipment
ME
any instrument, measurement standard, reference material and/or auxiliary apparatus or any combination
thereof necessary to implement a measurement process for carrying out a specified and defined
measurement
NOTE 1 This definition is necessarily wider than that of a measuring instrument [VIM:1993, 4.1] since it includes all the
means necessary for producing a measurement result.
NOTE 2 The concept measuring equipment includes, for example, indicating measuring instruments (3.2) and
material measures (3.3).
3.2
indicating measuring instrument
measuring equipment that displays an indication
NOTE 1 The display can be analog (continuous or discontinuous) or digital.
NOTE 2 Values of more than one quantity can be displayed simultaneously.
NOTE 3 A displaying measuring instrument can also provide a record.
[VIM:1993, 4.6]
EXAMPLES
a) Analog mechanical dial gauge,
b) digital calliper,
c) micrometer.
NOTE 4 The examples given in VIM are changed here to examples in length units.
3.3
material measure
device intended to reproduce or supply, in a permanent manner during its use, one or more known values of a
given quantity
NOTE 1 The quantity concerned can be called the supplied quantity.
[VIM:1993, 4.2]
2) Corrected and reprinted in 1995.
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SIST EN ISO 14978:2006
ISO 14978:2006(E)
EXAMPLES
a) Gauge block,
b) ball plate,
c) angle block,
d) limit gauge (e.g. gap gauge),
e) functional gauge,
f) surface texture standard,
g) reference ring,
h) tape measure.
NOTE 2 Material measure is included in the concept measuring equipment.
NOTE 3 The examples given in VIM are changed here to examples in length units.
3.4
mono-characteristic measuring equipment
measuring equipment which can be characterised by a single metrological characteristic
NOTE 1 Mono-characteristic measuring equipment is a simplifying theoretical concept which is described in this
standard as a contrast to the case of actual multi-characteristic measuring equipment.
NOTE 2 For simplification, especially when evaluating uncertainty contributions, multi-characteristic measuring
equipment (3.5) can be considered as a “black box” and therefore can be assumed to be a mono-characteristic
measuring equipment.
3.5
multi-characteristic measuring equipment
measuring equipment which is characterised by two or more metrological characteristics
NOTE All GPS measuring equipment is multi-characteristic (see 3.4 NOTE 2).
3.6
measurement process
set of interrelated resources, activities and influences which produce a measurement
NOTE 1 This term is commonly used for the calibration of measuring equipment and the measurement of workpieces.
NOTE 2 Resources can be human or material.
3.7
intended use
〈measuring equipment〉 measurement process in which specific measuring equipment is to be used
NOTE 1 Knowledge about intended use usually reduces the number of metrological requirements to be calibrated.
NOTE 2 Knowledge about intended use of the maximum permissible errors (MPE, see 3.21) for the metrological
requirements that need to be calibrated usually allows adjustment to more economical and less restrictive values.
3.8
calibration
〈measuring equipment〉 set of operations that establish, under specified conditions, the relationship between
values of quantities indicated by a measuring instrument or measuring system, or values represented by a
material measure or a reference material, and the corresponding values realized by standards
NOTE 1 The result of a calibration permits either the assignment of values of measurands to the indications, or the
determination of corrections with respect to indications.
NOTE 2 A calibration can also determine other metrological properties, such as the effect of influence quantities.
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SIST EN ISO 14978:2006
ISO 14978:2006(E)
NOTE 3 The result of a calibration can be recorded in a document, sometimes called a calibration certificate or a
calibration report.
[VIM:1993, 6.11]
NOTE 4 The VIM definition of calibration only applies to mono-metrological characteristic measuring equipment and
therefore usually does not apply to GPS measuring equipment (see 3.4 and 3.5).
3.9
calibration of a metrological characteristic
set of operations that establish, under specified conditions, the relationship between values of quantities of a
metrological characteristic, and the corresponding values realized by standards
NOTE Metrological characteristics can be defined and calibrated as quantities that need mathematical or geometrical
transformations to be compatible with the measurement result of the measuring equipment, e.g. flatness and parallelism of
the measuring faces of an external micrometer.
3.10
global calibration
〈measuring equipment〉 calibration of all metrological characteristics for measuring equipment
NOTE 1 Global calibration can be used if the intended use of the equipment is not known at the time of calibration, or
as an acceptance test to verify the agreed specifications in connection with the delivery of new measuring equipment.
NOTE 2 In cases of daily operation of the metrology system in a company, global calibration is usually not needed
(see 3.11).
3.11
task-related calibration
〈measuring equipment〉 calibration of only those metrological characteristics which influence the measurement
uncertainty for the intended use
NOTE 1 Usually a task-related calibration will include the calibration of only those metrological characteristics that have
a major influence on the measurement uncertainty for the intended use.
NOTE 2 Task-related calibrations can be performed using other, more economical procedures than those used in
global calibration; and a task-related calibration can be designed to deliver information (values and conditions) optimised
for use in the specific uncertainty budget.
NOTE 3 This definition of task-related calibration is intentionally formulated differently from that in ISO 12179, but the
meaning is the same. The difference in the text indicates a development in the GPS field.
3.12
metrological characteristic
MC
〈measuring equipment〉 characteristic of measuring equipment, which may influence the results of
measurement
NOTE 1 The influence on the results of measurement is an immediate (short-term) uncertainty contribution (see
Clause 6).
NOTE 2 A metrological characteristic is expressed in numerical values and can be evaluated in a unit other than that of
the measurement result of the actual measuring equipment.
NOTE 3 Measuring equipment usually has several metrological characteristics.
NOTE 4 Metrological characteristics can be subject to calibration (see 3.10 and 3.11).
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SIST EN ISO 14978:2006
ISO 14978:2006(E)
3.13
design characteristic
DC
〈measuring equipment〉 characteristic of measuring equipment which does not influence the measurement
directly, but which may be of interest for other reasons when the measuring equipment is used
NOTE 1 Design characteristics can influence interchangeability, readability of line scales and digital read-outs, wear
resistance, etc. (see Clause 5).
NOTE 2 Some design characteristics can influence the equipment’s long-term capacity to make measurements
(influencing design characteristics), e.g. its wear resistance, its environmental resistance, etc. Other design characteristics
have no influence the measurements (non-influencing design characteristics).
3.14
metrological requirement
MR
〈measuring equipment〉 requirement for a metrological characteristic
NOTE 1 Metrological requirements can be derived from specified requirements for a product/feature to be measured,
or can be decided on a general basis.
NOTE 2 A metrological requirement can be presented as a maximum permissible error (MPE, see 3.21) or as
permissible limits (MPL, see 3.20).
NOTE 3 Measuring equipment usually has several metrological requirements, one for each metrological characteristic.
3.15
design requirement
DR
〈measuring equipment〉 requirement for a design characteristic
NOTE 1 Design requirements can be derived from the intended use of the measuring equipment or decided on a
general basis, and can be given in a standard.
NOTE 2 A design requirement can be given in the form of dimensions, material requirements, interface protocols, etc.
(see Clause 5).
3.16
error (of indication)
〈measuring equipment〉 indication of measuring equipment minus a true value of the corresponding input
quantity
NOTE 1 Since a true value cannot be determined, in practice a conventional true value is used (see VIM:1993, 1.19
and 1.20).
NOTE 2 This concept applies mainly where the instrument is compared to a reference standard.
NOTE 3 For a material measure, the indication is the value assigned to it.
[VIM:1993, 5.20]
NOTE 4 The VIM term and definition generally do not apply to set-up specifications for GPS measuring equipment and
certainly not to the concept of a metrological characteristic in multi-characteristic measuring equipment. Term 3.18 is used
instead.
3.17
value of the actual metrological characteristic
value found by calibration and characterising the metrological characteristic
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SIST EN ISO 14978:2006
ISO 14978:2006(E)
3.18
error (deviation value) of a metrological characteristic
error value characterising the actual metrological characteristic (actual value minus ideal value of the
characteristic)
NOTE 1 An error of a metrological characteristic can be evaluated in a unit other than that of the measurement result of
the actual measuring equipment.
NOTE 2 This term is used for multi-characteristic measuring equipment (see 3.16, NOTE 4).
3.19
maximum permissible errors
〈measuring equipment〉 extreme values of an error permitted by specifications, regulations, etc. for a given
piece of measuring equipment
See 7.5 and Figures 9 to 12.
NOTE 1 This definition is a parallel to VIM:1993, 5.21 for measuring instruments.
NOTE 2 This term is only applicable to mono-metrological characteristic measuring equipment.
NOTE 3 This term and definition generally do not apply to specifications for GPS measuring equipment and certainly
not to the concept of a metrological characteristic in multi-characteristic measuring equipment. Term 3.20 or 3.21 is used
instead.
3.20
permissible limits of a metrological characteristic
MPL
extreme values of a metrological characteristic permitted by specifications, regulations, etc. for a given piece
of measuring equipment
See 7.5.5 and Figure 12.
NOTE MPL can be a value or set of values or a function (MPL-function).
3.21
maximum permissible errors for a metrological characteristic
MPE
extreme values of an error of a metrological characteristic permitted by specifications, regulations, etc. for a
given piece of measuring equipment
See 7.5 and Figures 9 to 12.
NOTE 1 This definition is a parallel to VIM:1993, 5.21 for measuring instruments (see 3.19).
NOTE 2 MPE can be a value or set of values or a function (MPE-function).
3.22
repeatability
〈measuring instrument〉 ability of a measuring instrument to provide very similar indications for repeated
applications of the same measurand under the same conditions of measurement
NOTE 1 These conditions include:
⎯ reduction to a minimum of the variations due to the observer,
⎯ the same measurement procedure,
⎯ the same observer,
⎯ the same measuring equipment, used under the same conditions,
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SIST EN ISO 14978:2006
ISO 14978:2006(E)
⎯ the same location,
⎯ repetition over a short period of time.
NOTE 2 Repeatability can be expressed quantitatively in terms of the dispersion characteristics of the indications.
[VIM:1993, 5.27]
NOTE 3 This term and definition generally do not apply to specifications for GPS measuring equipment and certainly
not to the concept of a metrological characteristic in a multi-characteristic measuring equipment. Term 3.23 is used
instead.
3.23
repeatability of a metrological characteristic
ability of measuring equipment to provide very similar values for repeated measurements of a particular
metrological characteristic under the same conditions
NOTE 1 This definition is parallel to 3
...
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