Geometrical Product Specifications (GPS) - Acceptance and reverification tests for coordinate measuring systems (CMS) - Part 12: Articulated arm coordinate measurement machines (CMM) (ISO 10360-12:2016)

This part of ISO 10360 specifies the acceptance tests for verifying the performance of an articulated arm CMM used for measuring calibrated test lengths as stated by the manufacturer. It also specifies the reverification tests that enable the user to periodically reverify the performance of the articulated arm CMM. It applies to articulated arm CMMs using tactile probes, scanner probes, or both.

Geometrische Produktspezifikation (GPS) - Annahme- und Bestätigungsprüfung für Koordinatenmesssysteme (KMS) - Teil 12: Koordinatenmessgeräte (KMG) mit Gelenkausleger (ISO 10360-12:2016)

Spécification géométrique des produits (GPS) - Essais de réception et de vérification périodique des machines à mesurer tridimensionnelles (MMT) - Partie 12: MMT à bras articulés (ISO 10360-12:2016)

ISO 10360-12:2016 spécifie les essais de réception visant à vérifier que les performances d'une MMT à bras articulés en mesurant des longueurs d'essai étalonnées soient conformes aux indications du fabricant. Elle spécifie également les essais de vérification périodique permettant à l'utilisateur de vérifier périodiquement les performances de la MMT à bras articulés. Elle s'applique aux MMT à bras articulés utilisant des palpeurs tactiles et optionnellement des détecteurs optiques sans contact. Des informations supplémentaires sur les essais pour accessoires de scanning sont données à l'Annexe E.
ISO 10360-12:2016 ne spécifie pas la fréquence ou le moment où l'essai est réalisé, le cas échéant, et ne précise pas la partie qui doit supporter le coût de l'essai.
ISO 10360-12:2016 spécifie:
-      les exigences de performance qui peuvent être fixées par le fabricant ou l'utilisateur de la MMT à bras articulés;
-      la façon d'exécuter les essais de réception et de vérification périodique pour démontrer les exigences spécifiées;
-      les règles pour prouver la conformité; et
-      les applications pour lesquelles les essais de réception et de vérification périodique peuvent être utilisés.

Specifikacija geometrijskih veličin izdelka (GPS) - Preskusi za sprejemljivost in ponovno overjanje koordinatnih merilnih strojev (KMS) - 12. del: Gibljiva roka koordinatnih merilnih strojev (ISO 10360-12:2016)

Ta del standarda ISO 10360 določa preskuse sprejemljivosti za preverjanje delovanja gibljive roke koordinatnih merilnih strojev (KMS) za merjenje dolžin umerjenega preskusa, kot jih navaja proizvajalec. Določa tudi preskuse ponovnega preverjanja, ki uporabniku omogočajo redno ponovno preverjanje delovanja laserskega 3D merilnika. Uporablja se za gibljive roke koordinatnih merilnih strojev, ki uporabljajo taktilne sonde, sonde za skeniranje ali oboje.

General Information

Status
Published
Public Enquiry End Date
04-Dec-2014
Publication Date
04-Dec-2016
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
16-Nov-2016
Due Date
21-Jan-2017
Completion Date
05-Dec-2016

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SLOVENSKI STANDARD
SIST EN ISO 10360-12:2017
01-januar-2017

6SHFLILNDFLMDJHRPHWULMVNLKYHOLþLQL]GHOND *36 3UHVNXVL]DVSUHMHPOMLYRVWLQ

SRQRYQRRYHUMDQMHNRRUGLQDWQLKPHULOQLKVWURMHY .06 GHO*LEOMLYDURND
NRRUGLQDWQLKPHULOQLKVWURMHY ,62

Geometrical Product Specifications (GPS) - Acceptance and reverification tests for

coordinate measuring systems (CMS) - Part 12: Articulated arm coordinate
measurement machines (CMM) (ISO 10360-12:2016)
Geometrische Produktspezifikation (GPS) - Annahme- und Bestätigungsprüfung für
Koordinatenmesssysteme (KMS) - Teil 12: Koordinatenmessgeräte (KMG) mit
Gelenkausleger (ISO 10360-12:2016)

Spécification géométrique des produits (GPS) - Essais de réception et de vérification

périodique des machines à mesurer tridimensionnelles (MMT) - Partie 12: MMT à bras

articulés (ISO 10360-12:2016)
Ta slovenski standard je istoveten z: EN ISO 10360-12:2016
ICS:
17.040.30 Merila Measuring instruments
17.040.40 6SHFLILNDFLMDJHRPHWULMVNLK Geometrical Product
YHOLþLQL]GHOND *36 Specification (GPS)
SIST EN ISO 10360-12:2017 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 10360-12:2017
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SIST EN ISO 10360-12:2017
EN ISO 10360-12
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2016
EUROPÄISCHE NORM
ICS 17.040.30
English Version
Geometrical product specifications (GPS) - Acceptance and
reverification tests for coordinate measuring systems
(CMS) - Part 12: Articulated arm coordinate measurement
machines (CMM) (ISO 10360-12:2016)

Spécification géométrique des produits (GPS) - Essais Geometrische Produktspezifikation (GPS) - Annahme-

de réception et de vérification périodique des systèmes und Bestätigungsprüfung für Koordinatenmesssysteme

de mesure tridimensionnels (SMT) - Partie 12: (KMS) - Teil 12: Koordinatenmessgeräte (KMG) mit

Machines à mesurer tridimensionnelles à bras articulés Gelenkausleger (ISO 10360-12:2016)

(MMT) (ISO 10360-12:2016)
This European Standard was approved by CEN on 27 August 2016.

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, 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

© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10360-12:2016 E

worldwide for CEN national Members.
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SIST EN ISO 10360-12:2017
EN ISO 10360-12:2016 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 10360-12:2017
EN ISO 10360-12:2016 (E)
European foreword
This document (EN ISO 10360-12:2016) 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 May 2017, and conflicting national standards shall be

withdrawn at the latest by May 2017.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent

rights.

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, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 10360-12:2016 has been approved by CEN as EN ISO 10360-12:2016 without any

modification.
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SIST EN ISO 10360-12:2017
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SIST EN ISO 10360-12:2017
INTERNATIONAL ISO
STANDARD 10360-12
First edition
2016-10-01
Geometrical product specifications
(GPS) — Acceptance and reverification
tests for coordinate measuring
systems (CMS) —
Part 12:
Articulated arm coordinate
measurement machines (CMM)
Spécification géométrique des produits (GPS) — Essais de
réception et de vérification périodique des systèmes de mesure
tridimensionnels (SMT) —
Partie 12: Machines à mesurer tridimensionnelles à bras articulés
(MMT)
Reference number
ISO 10360-12:2016(E)
ISO 2016
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SIST EN ISO 10360-12:2017
ISO 10360-12:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, 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. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
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SIST EN ISO 10360-12:2017
ISO 10360-12:2016(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Symbols .......................................................................................................................................................................................................................... 6

5 Rated operating conditions ....................................................................................................................................................................... 7

5.1 Environmental conditions ............................................................................................................................................................. 7

5.2 Operating conditions ......................................................................................................................................................................... 8

6 Acceptance tests and reverification tests ................................................................................................................................... 8

6.1 General ........................................................................................................................................................................................................... 8

6.2 Probing size and form errors ...................................................................................................................................................... 8

6.2.1 Principle .................................................................................................................................................................................. 8

6.2.2 Measuring equipment ................................................................................................................................................. 8

6.2.3 Procedure ............................................................................................................................................................................... 8

6.2.4 Derivation of test results ........................................................................................................................................10

6.3 Articulated location errors ........................................................................................................................................................10

6.3.1 Principle ...............................................................................................................................................................................10

6.3.2 Measuring equipment ..............................................................................................................................................10

6.3.3 Procedure ............................................................................................................................................................................10

6.3.4 Derivation of test results ........................................................................................................................................11

6.4 Length measurement errors ....................................................................................................................................................11

6.4.1 Principle ...............................................................................................................................................................................11

6.4.2 Measuring equipment ..............................................................................................................................................12

6.4.3 Procedure ............................................................................................................................................................................12

7 Compliance with specification ............................................................................................................................................................16

7.1 Acceptance tests .................................................................................................................................................................................16

7.1.1 Acceptance criteria .....................................................................................................................................................16

7.1.2 Data rejection and repeated measurements .........................................................................................16

7.2 Reverification tests ...........................................................................................................................................................................17

8 Applications ............................................................................................................................................................................................................17

8.1 Acceptance test ....................................................................................................................................................................................17

8.2 Reverification test .............................................................................................................................................................................17

8.3 Interim check .........................................................................................................................................................................................18

9 Indication in product documentation and data sheets .............................................................................................19

Annex A (informative) Forms ....................................................................................................................................................................................20

Annex B (normative) Artefacts that represent a calibrated test length........................................................................22

Annex C (informative) Alignment of artefacts .........................................................................................................................................28

Annex D (informative) Interim testing ............................................................................................................................................................29

Annex E (normative) Testing a scanning probing system of an articulated arm CMM ..................................31

Annex F (normative) Length error measurement by concatenating test lengths ..............................................32

Annex G (informative) Optional probing articulated size and forms errors ...........................................................37

Annex H (informative) Optional repeatability range of the length measurement error ............................38

Annex I (informative) Relation to the GPS matrix model .............................................................................................................39

Bibliography .............................................................................................................................................................................................................................40

© ISO 2016 – All rights reserved iii
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SIST EN ISO 10360-12:2017
ISO 10360-12:2016(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 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.

The committee responsible for this document is ISO/TC 213, Dimensional and geometrical product

specifications and verification.

ISO 10360 consists of the following parts, under the general title Geometrical Product specifications

(GPS) — Acceptance and reverification tests for coordinate measuring systems (CMS):

— Part 1: Vocabulary
— Part 2: CMMs used for measuring linear dimensions
— Part 3: CMMs with the axis of a rotary table as the fourth axis
— Part 4: CMMs used in scanning measuring mode
— Part 5: CMMs using single and multiple stylus contacting probing system
— Part 6: Estimation of errors in computing of Gaussian associated features
— Part 7: CMMs equipped with imaging probing systems
— Part 8: CMMs with optical distance sensors
— Part 9: CMMs with multiple probing systems
— Part 10: Laser trackers for measuring point-to-point distances
— Part 12: Articulated arm coordinate measuring machines (CMM)
iv © ISO 2016 – All rights reserved
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SIST EN ISO 10360-12:2017
ISO 10360-12:2016(E)
Introduction

This part of ISO 10360 is a general GPS standard (see ISO 14638). For more detailed information about

the relation of this part of ISO 10360 to other standards and the GPS matrix model, see Annex I.

This part of ISO 10360 is included in the ISO/GPS Masterplan given in ISO 14638, which gives an

overview of the ISO/GPS system. The fundamental rules of ISO/GPS given in ISO 8015 apply to this

part of ISO 10360 and the default decision rules given in ISO 14253-1 apply to specifications made in

accordance with this part of ISO 10360, unless otherwise indicated.

The objective of this part of ISO 10360 is to provide a well-defined testing procedure to

— enable manufacturers of articulated arm CMMs to provide specification MPEs, and

— enable users to test articulated arm CMMs to manufacturer specifications using calibrated traceable

reference artefacts.

The benefits of these tests are that the measured result has a direct traceability to the unit length, the

metre, and that they give information on how the articulated arm CMM will perform on similar length

measurements.
© ISO 2016 – All rights reserved v
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SIST EN ISO 10360-12:2017
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SIST EN ISO 10360-12:2017
INTERNATIONAL STANDARD ISO 10360-12:2016(E)
Geometrical product specifications (GPS) — Acceptance
and reverification tests for coordinate measuring
systems (CMS) —
Part 12:
Articulated arm coordinate measurement machines (CMM)
1 Scope

This part of ISO 10360 specifies the acceptance tests for verifying the performance of an articulated

arm CMM by measuring calibrated test lengths as stated by the manufacturer. It also specifies the

reverification tests that enable the user to periodically reverify the performance of the articulated arm

CMM. It applies to articulated arm CMMs using tactile probes and optionally optical distance sensors

(also referred to as laser line scanners or laser line probes). Details on tests for scanner accessories are

given in Annex E.

This part of ISO 10360 does not specify how often or when testing is performed, if at all, nor does it

specify which party should bear the cost of testing.
This part of ISO 10360 specifies

— performance requirements that can be assigned by the manufacturer or the user of the articulated

arm CMM,

— the manner of execution of the acceptance and reverification tests to demonstrate the stated

requirements,
— rules for proving conformance, and
— applications for which the acceptance and reverification tests can be used.
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 10360-8:2013, Geometrical product specifications (GPS) — Acceptance and reverification tests for

coordinate measuring systems (CMS) — Part 8: CMMs with optical distance sensors

ISO 10360-9:2013, Geometrical product specifications (GPS) — Acceptance and reverification tests for

coordinate measuring systems (CMS) — Part 9: CMMs with multiple probing systems
3 Terms and definitions

For the purposes of this document, the following terms and definitions given in ISO 10360-1 and the

following apply.

NOTE The definitions in this section are intended to concisely state the meaning of terms. For metrological

characteristics that have numerical values, the complete description of the procedure and derivation of test

results in Clause 6 and Annex E are to be followed in determining values.
© ISO 2016 – All rights reserved 1
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SIST EN ISO 10360-12:2017
ISO 10360-12:2016(E)
3.1
articulated arm coordinate measuring machine
system that measures spatial coordinates and comprises
— an open chain of fixed-length segments,

— joint assemblies interconnecting the segments and the probing system and attaching them to the

stationary environment, and
— a probing system at the free end of the chain

Note 1 to entry: The probing system may comprise a rigid probe or a sensing system such as a scanner.

Note 2 to entry: Rotary joint assemblies connected to the fixed-length segments are equipped with angular

encoders. Cartesian coordinates of each measuring point are calculated from the measured angles and segment

lengths.
3.2
joint

connection between adjacent elements of an articulated arm CMM that allows a single rotational degree

of freedom between these elements

Note 1 to entry: There are two types of joints: hinge joints, which cause a hinging movement between adjacent

arm segments, and swivel joints, which cause a rotary movement around the axis of the connected arm segment.

Note 2 to entry: Each joint ordinarily includes an angle measuring device (rotary encoder).

3.3
joint assembly

assembly of two or more joints between two adjacent elements of an articulated arm CMM

Note 1 to entry: Usually, a joint assembly includes at least a hinge joint and a swivel joint.

Note 2 to entry: In analogy to the human arm, the three main joint assemblies are designated the shoulder, elbow,

and wrist.

Note 3 to entry: Current machines have 2 or 3 degrees of freedom each for shoulder (a, b), elbow (c, d), and wrist

(e, f, g), as shown in Figure 1. Consequently, articulated arm CMMs are referred to as either six or seven axis

machines.
a) With six rotary axes
2 © ISO 2016 – All rights reserved
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SIST EN ISO 10360-12:2017
ISO 10360-12:2016(E)
b) With seven rotary axes
Figure 1 — Articulated arm CMM
3.4
measuring range

diameter of the spherical volume within which an articulated arm CMM is capable of measuring

Note 1 to entry: The measuring range is specified by the manufacturer.

Note 2 to entry: The measuring range is twice the reach of the articulated arm. However, some of the regions that

can be reached by the articulated arm may not be within the measuring volume.
3.5
measuring volume

region in space over which the manufacturer specifies the performance of the articulated arm CMM

Note 1 to entry: The measuring volume is restricted by inaccessible zones specified by the manufacturer. For

example, there may be an inaccessible zone close to the vertical main axis.

Note 2 to entry: Manufacturers may specify more than one measuring volume for a machine, each measuring

volume having a separate performance specification.

Note 3 to entry: Because of the possibility of binding up a joint when adjacent arm segments are brought close

together, the size of the measuring volume may depend on the direction of the probe stylus in relation to the

outside of the measuring volume or inaccessible zones within the measuring volume. The manufacturer may

specify one or more measuring volumes according to the direction of the probe stylus.

3.6
useful arm length
half the measuring range
3.7
coefficient of thermal expansion
CTE
linear thermal expansion coefficient of a material at 20 °C

Note 1 to entry: The above definition for CTE does not imply that a user is required to make measurements at 20 °C.

© ISO 2016 – All rights reserved 3
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SIST EN ISO 10360-12:2017
ISO 10360-12:2016(E)
3.8
normal CTE material
−6 −6
material with a CTE between 8 × 10 /°C and 13 × 10 /°C

Note 1 to entry: Some documents may express CTE in units 1/K, which is equivalent to 1/°C.

[SOURCE: ISO 10360-2]
3.9
kinematic seat

mechanical seat (nest) that repeatably holds the centre of a spherical surface in a fixed position in space

Note 1 to entry: An example of a kinematic seat is a trihedral seat that includes three hardened spheres, each

sphere placed on a circle and separated from the other spheres by nominally 120°. Each of the three spheres

contacts the surface of a larger sphere (or spherical surface) so as to permit repeatable positioning of the centre

of the larger sphere in space.

Note 2 to entry: As used in this part of ISO 10360, a kinematic seat provides constraint for 3 degrees of freedom

rather than 6 degrees of freedom.
3.10
single-point articulation test

test in which articulated arm CMM probe is held within a kinematic seat while the elbow location is

rotated by 180°

Note 1 to entry: The single-point articulation test is an interim test described in Annex D.

3.11
articulated location error, tactile
Dia.5x5:Art:Tact.AArm

diameter of the minimum circumscribed sphere encompassing the points that are the centres of the

five spheres obtained from performing the articulated location test when using a tactile probe

Note 1 to entry: In the context of this part of ISO 10360, the local abbreviation L is used.

Dia.5x5:Art
3.12
length measurement error, bidirectional
Bi:0:Tact.AArm

error of indication when performing a bidirectional point-to-point distance measurement

Note 1 to entry: In the context of this part of ISO 10360, the local abbreviation E is used.

Note 2 to entry: The subscript 0 indicates that there is no tip offset. There may be an offset in some other parts of

ISO 10360.
3.13
length measurement error, unidirectional
Uni:0:Tact.AArm

error of indication when performing a unidirectional point-to-point distance measurement

Note 1 to entry: Annex B discusses unidirectional and bidirectional measurements.

Note 2 to entry: In the context of this part of ISO 10360, the local abbreviation E is used.

Uni
3.14
probing form error, tactile
Form.Sph.1x25::Tact.AArm

error of indication within which the range of Gaussian radial distances can be determined by a Gaussian

(least-squares) fit of 25 points measured by a tactile probe on a test sphere

Note 1 to entry: In the context of this part of ISO 10360, the local abbreviation P is used.

Form.Sph.1x25
4 © ISO 2016 – All rights reserved
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SIST EN ISO 10360-12:2017
ISO 10360-12:2016(E)
3.15
probing size error, tactile
Size.Sph.1x25::Tact.AArm

error of indication of the diameter of a spherical material standard of size as determined by a Gaussian

(least-squares) fit of 25 points measured by a tactile probe

Note 1 to entry: In the context of this part of ISO 10360, the local abbreviation P is used.

Size.Sph.1x25
3.16
maximum permissible error of articulated location error, tactile
Dia.5x5:Art:Tact.AArm,MPE

extreme value of the articulated location error, tactile, L , permitted by specifications

Dia.5x5:Art:Tact.AArm

Note 1 to entry: In the context of this part of ISO 10360, the local abbreviation L is used.

Dia.5x5:Art,MPE
3.17
maximum permissible error of bidirectional length measurement
Bi:0:Tact.AArm,MPE

extreme value of the bidirectional length measurement error, E , permitted by specifications

Bi:0:Tact.AArm

Note 1 to entry: In the context of this part of ISO 10360, the local abbreviation E is used.

Bi,MPE
3.18
maximum permissible error of unidirectional length measurement
Uni:0:Tact.AArm,MPE
extreme value of the unidirectional length measurement error, E , permitted by
Uni:0:Tact.AArm
specifications

Note 1 to entry: In the context of this part of ISO 10360, the local abbreviation E is used.

Uni,MPE
3.19
maximum permissible error of probing form, tactile
Form
...

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