SIST EN IEC 62890:2020
Industrial-process measurement, control and automation - Life-cycle-management for systems and components (IEC 62890:2020)
This International Standard establishes basic principles for Life-Cycle-Management of systems
and components used for industrial-process measurement, control and automation. These
principles are applicable to various industrial sectors. This standard provides definitions and
reference models related to the life-cycle of a product type and the life time of a product instance,
It defines a consistent set of generic reference models and terms. The key models defined are:
– Life-Cycle-Model;
– structure model;
– compatibility model.
This document also describes the application of these models for Life-Cycle-Management
strategies. The content is used for technical aspects concerning the design, planning,
development and maintenance of automation systems and components and the operation of
the plant.
The definitions of generic models and terms regarding Life-Cycle-Management are
indispensable for a common understanding and application by all partners in the value chain
such as plant user, product and system producer, service provider, and component supplier.
The models and strategies described in this standard are also applicable for related
management systems, i.e. MES and ERP.
Industrielle Leittechnik - Life-cycle-Management von Systemen und Komponenten (IEC 62890:2020)
Mesure, commande et automation dans les processus industriels - Gestion du cycle de vie des systèmes et produits (IEC 62890:2020)
Meritev, nadzor in avtomatizacija merilnega procesa - Upravljanje življenjskega ciklusa za sisteme in sestavne dele (IEC 62890:2020)
13.020.60 - Product life-cycles
25.040.40 - Industrial process measurement and control
MOV - Measuring equipment for electromagnetic quantities
EN IEC 62890:2020 - Industrial-process measurement, control and automation - Life-cycle-management for systems and components
SIST EN IEC 62890:2020 - BARVE. Vodni pretisk na sredini strani na PDF-str: od 46 do 51
01-december-2020
Meritev, nadzor in avtomatizacija merilnega procesa - Upravljanje življenjskega
ciklusa za sisteme in sestavne dele (IEC 62890:2020)
Industrial-process measurement, control and automation - Life-cycle-management for
systems and components (IEC 62890:2020)
Industrielle Leittechnik - Life-cycle-Management von Systemen und Komponenten (IEC
62890:2020)
Mesure, commande et automation dans les processus industriels - Gestion du cycle de
vie des systèmes et produits (IEC 62890:2020)
Ta slovenski standard je istoveten z: EN IEC 62890:2020
13.020.60 Življenjski ciklusi izdelkov Product life-cycles
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
SIST EN IEC 62890:2020 en,fr,de
EUROPEAN STANDARD EN IEC 62890
EUROPÄISCHE NORM
Industrial-process measurement, control and automation - Life-
cycle-management for systems and components
(IEC 62890:2020)
Mesure, commande et automation dans les processus Industrielle Leittechnik - Life-cycle-Management von
industriels - Gestion du cycle de vie des systèmes et Systemen und Komponenten
produits (IEC 62890:2020)
This European Standard was approved by CENELEC on 2020-08-26. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62890:2020 E
EN IEC 62890:2020 (E)
European foreword
The text of document 65/805/FDIS, future edition 1 of IEC 62890, prepared by IEC/TC 65 "Industrial-
process measurement, control and automation" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 62890:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-05-26
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-08-26
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 62890:2020 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 61804-2 NOTE Harmonized as EN IEC 61804-2
IEC 61804-3 NOTE Harmonized as EN 61804-3
IEC 61987 (series) NOTE Harmonized as EN IEC 61987 (series)
IEC 61987-10 NOTE Harmonized as EN 61987-10
IEC 62402:2019 NOTE Harmonized as EN IEC 62402:2019 (not modified)
Edition 1.0 2020-07
Industrial-process measurement, control and automation – Life-cycle-
management for systems and components
ELECTROTECHNICAL
ICS 25.040.40 ISBN 978-2-8322-8683-8
Warning! Make sure that you obtained this publication from an authorized distributor.
® Registered trademark of the International Electrotechnical Commission
– 2 – IEC 62890:2020 © IEC 2020
FOREWORD ........................................................................................................................... 4
INTRODUCTION ..................................................................................................................... 6
1 Scope .............................................................................................................................. 7
2 Normative references ...................................................................................................... 7
3 Terms, definitions and abbreviations ............................................................................... 7
3.1 Terms and definitions.............................................................................................. 7
3.2 Abbreviated terms and acronyms .......................................................................... 12
4 Generic models for Life-Cycle-Management .................................................................. 13
4.1 Product type and product instance ........................................................................ 13
4.2 Life-Cycle-Model ................................................................................................... 14
4.3 Structure model .................................................................................................... 16
4.4 Compatibility model .............................................................................................. 19
5 Strategies for Life-Cycle-Management ........................................................................... 23
5.1 General ................................................................................................................. 23
5.2 Last-time buy ........................................................................................................ 25
5.3 Substitution ........................................................................................................... 26
5.4 Re-design ............................................................................................................. 27
5.5 Migration............................................................................................................... 28
5.6 Comparison of the strategies ................................................................................ 30
5.7 Application of Life-Cycle-Management strategies for service ................................. 31
5.7.1 Service regarding Life-Cycle-Management ..................................................... 31
5.7.2 Service levels ................................................................................................ 31
5.7.3 Standard service ........................................................................................... 31
5.7.4 Service through special agreement ................................................................ 31
6 Life-Cycle-Management ................................................................................................. 32
6.1 Proactive Life-Cycle-Management ......................................................................... 32
6.2 Life-Cycle-Excellence ........................................................................................... 33
Annex A (informative) The current status of life-cycle aspects ............................................. 35
Annex B (informative) Requirements, influencing factors, industry-specifics ........................ 38
B.1 General requirements ........................................................................................... 38
B.2 Consideration of industry-specific requirements .................................................... 40
B.3 Requirements of the energy industry ..................................................................... 48
B.3.1 General industry characteristics ..................................................................... 48
B.3.2 Life-cycle related requirements ...................................................................... 49
B.3.3 Industry-specific economic aspects................................................................ 49
B.3.4 Anticipated industry trends ............................................................................ 50
B.4 Industry-neutral aspects ........................................................................................ 50
B.4.1 Overview ....................................................................................................... 50
B.4.2 Examples of external technical influences...................................................... 51
B.4.3 Examples of the influence of standardization and legislation .......................... 51
B.4.4 Examples of socio-economic influences ......................................................... 51
B.5 Summary .............................................................................................................. 52
Annex C (informative) Life-cycle considerations for selected examples ................................ 55
C.1 Component life-cycles ........................................................................................... 55
C.2 Microprocessors ................................................................................................... 55
IEC 62890:2020 © IEC 2020 – 3 –
C.3 Field device integration ......................................................................................... 56
C.4 Standards and regulations .................................................................................... 57
Annex D (informative) Example for the application of the Life-Cycle-Management
strategies .............................................................................................................................. 59
Annex E (informative) Plant user strategies ......................................................................... 62
Annex F (informative) UML diagram semantics .................................................................... 64
Bibliography .......................................................................................................................... 66
Figure 1 – Relationship of product type and its product instance(s) ....................................... 13
Figure 2 – Generic Life-Cycle-Model of a product type .......................................................... 14
Figure 3 – Evolution of products (type with version and revision) .......................................... 15
Figure 4 – Maintenance of products (type with version and revision) ..................................... 15
Figure 5 – Life time of a product instance ............................................................................. 16
Figure 6 – UML diagram of a hierarchical system structure ................................................... 17
Figure 7 – Hierarchical system structure (example) ............................................................... 17
Figure 8 – Example for Life-Cycle-Management of a system (type) by integrating
components (types) .............................................................................................................. 18
Figure 9 – Example of integrating components into a system ................................................ 19
Figure 10 – Example of mapping of compatibility requirements to the level of
compatibility ......................................................................................................................... 22
Figure 11 – Example of a compatibility assessment of a product ........................................... 23
Figure 12 – Relationships between the partners in the value chain ....................................... 23
Figure 13 – Ensuring delivery of a system through last-time buy of a component .................. 25
Figure 14 – Ensuring delivery of a system through substitution of a component .................... 26
Figure 15 – Re-design of a system due to end of production of a component ........................ 28
Figure 16 – Level model for migration steps .......................................................................... 29
Figure 17 – Typical characteristics of the Life-Cycle-Management strategies ........................ 30
Figure 18 – Life-Cycle-Excellence ......................................................................................... 34
Figure A.1 – Typical structure of an instrumentation and control system with functional
levels according to IEC 62264-1 ........................................................................................... 35
Figure A.2 – Example of the effects of component failure ...................................................... 36
Figure A.3 – Life-cycles of plants and their components........................................................ 37
Figure A.4 – The iceberg effect ............................................................................................. 37
Figure B.1 – Trade-off between procurement costs (initial investments) and costs for
operating and maintenance ................................................................................................... 39
Figure B.2 – Typical ranges of variables which influence the life-cycle .................................. 53
Figure C.1 – Examples of component life-cycles ................................................................... 55
Figure D.1 – Compatibility assessment of replacement devices ............................................ 59
Figure D.2 – Replacement of the defective device with a new device .................................... 61
Figure F.1 – Semantics of UML elements used in this document ........................................... 64
Table B.1 – Overview of industry-specific requirements ........................................................ 42
Table E.1 – Fundamental characteristics of plant users ........................................................ 63
INTERNATIONAL ELECTROTECHNICAL COMMISSION
INDUSTRIAL-PROCESS MEASUREMENT, CONTROL AND AUTOMATION –
LIFE-CYCLE-MANAGEMENT FOR SYSTEMS AND COMPONENTS
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
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members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62890 has been prepared by IEC technical committee 65: Industrial-
process measurement, control and automation.
The text of this International Standard is based on the following documents:
FDIS Report on voting
65/805/FDIS 65/820/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.
In today's automation applications, an increasing divergence of the life-cycles of components,
devices and systems in comparison to the life time of overall plants is evident. The increasing
functionality of components, the advancing development of electronics and the innovation
dynamics inherent to hardware and software are continuously shortening the life-cycle of
individual automation components. Certain semiconductor components are only manufactured
for a short period of time, for example, and subsequently abandoned.
By comparison, the time in use of automation systems is considerably longer. Moreover, there
are considerable differences depending on the industry sector. The time in use of a production
line in the automobile industry is usually identical with the period of time in which a new model
is manufactured which is around 7 to 8 years today. By comparison, the operational life of a
process plant in the chemical industry is typically some 15 years, while up to 50 years may be
reached in the case of oil and energy, and power plants. The plant and product life-cycles have
to be considered by the management for the overall plant functionality and economic
Increased utilization and integration of plant process data from automation systems towards
enterprise and asset management systems has caused technology dependencies between
hierarchy layers of automation systems. A more uniform way of dealing with Life-Cycle
Management between these layers and all partners in the value chain is essential with respect
to plant regularity, operability and security aspects.
Consequently, this necessitates different strategies to maintain the availability of the plant by.
sophisticated maintenance strategies. As a result, considerable demands are made on the
delivery capacity of automation products and spare parts, as well as the provision of services,
such as maintenance and repairs. For example, when the planning of a new plant envisages
the usage of a newer version of an engineering system, the producer has to ensure that this
newer version can also be employed for older components and systems already in use in the
existing plant and may have to develop upgrades accordingly. To an increasing extent, this
calls for close cooperation between the partners along the value chain.
The presented situation illustrates that mastering these conflicting characteristics of Life-Cycle-
Management will become increasingly significant in automation, not least in the ongoing
discussions between plant users and manufacturers as well as manufacturers and suppliers.
The interaction between global, legal and technical aspects – including demands for high
functionality and efficiency, as well as the influence of IT technologies in automation – helps to
demonstrate the scope of this topic.
This International Standard has been prepared in response to this situation. It is comprised of
basic, complementary and consistent models and strategies for Life-Cycle-Management in
automation. These generic models and strategies are then applied to various examples.
Consequently, this document represents a consistent general approach, which is applicable to
automation in various industrial sectors. The economic significance of Life-Cycle-Management
is a recurring theme of this document. The definitions of generic models, terms, processes and
strategies form an indispensable foundation for a joint understanding between plant users and
manufacturers and between manufacturers and suppliers regarding Life-Cycle-Management.
Proactive Life-Cycle-Management focuses on the selection of robust components,
specifications, and technologies that consequently have long-term stability. The proactive
approach includes the application of this set of generic reference models in the development of
standards in order to be able to efficiently ensure sustainable interoperability and compatibility.
---------------------- Page: 10 ----------------------
There are no normative references in this document.
3 Terms, definitions and abbreviations
3.1 Terms and definitions
ISO and IEC maintain terminological databases for use in standardization at the following
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
after-sales support phase
phase in the life-cycle of a product type which begins at the end of the selling phase and ends
with product abandonment
downward compatibility
fulfilment by a new component of all the specified requirements of the compatibility profile of its
Note 1 to entry: Antonyms are forward compatibility and upward compatibility, respectively.
capability profile
compatibility profile that represents characteristics of a product type
ability of a component to fulfill the compatibility profile of another component
compatibility assessment
verification of an agreed compatibility level
compatibility profile
list of all compatibility requirements of a system, or a component of a system, depending upon
autonomous element of a system, which fulfills a defined sub-function
construction compatibility
fulfilment of the constructional aspects of a compatibility profile by a component
Note 1 to entry: Related requirements are physical dimensions, construction properties, connection method
(including e.g. power supply) and the location with respect to environmental conditions.
data compatibility
fulfilment of the functional aspects related to data type and format of a compatibility profile by
a component
delivery release
end of the manufacturing preparation process after which series production can begin
Note 1 to entry: The manufacturing preparation process is part of the development phase.
development phase
phase of the product life-cycle which begins with the decision to develop a product type and
ends with delivery release of the product type
removal of a product instance following the time in use and disposal or recycling
Note 1 to entry: This is the final phase of the life-cycle of a product instance
end of sales
end of all active sales activities for a product
Note 1 to entry: This is also called discontinuation of a product.
end of service
end of all service activities for a product type
end of production
point of time when instances of a product type are no longer produced
full compatibility
fulfilment of all aspects of a compatibility profile by a component
Note 1 to entry: The aspects are function, construction, location and performance.
function compatibility
fulfilment of the functional aspects of a compatibility profile by a component
concrete, clearly identifiable component of a certain type
Note 1 to entry: It becomes an individual entity of a type, for example a device, by defining specific property values.
Note 2 to entry: In an object-oriented view, an instance denotes an object of a class (of a type).
last-time buy
Life-Cycle-Management strategy in which instances of an abandoned product type are
purchased before end of sales
level of compatibility
fulfillment of the requirements described in the compatibility profile
length of time from the end of the creation of a product instance to the end of disposal
length of time from the start of the development phase of a product type to the product
Life-Cycle-Costs
sum of all instance costs for plant user incurred after purchase up to the end of the life tim
SIST EN IEC 62832-3:2021(Main)
Industrial-process measurement, control and automation - Digital factory framework - Part 3: Application of Digital Factory for life cycle management of production systems (IEC 62832-3:2020)
EN IEC 62832-3:2020
This part of IEC 62832 specifies rules of the Digital Factory framework for managing information
of a production system throughout its life cycle. It also defines how information will be added,
deleted or changed in the DigitalFactory by the various activities during the life cycle of the
production system.
These rules include:
– rules to represent a production system with a DigitalFactory;
– rules to represent a PS asset or a role with a DFasset;
– rules to represent a relationship between PS assets with a DFassetLink;
– rules to represent a relationship between roles with a DFassetLink;
– rules to represent the hierarchy of PS assets in a production system;
– rules to check the compatibility between associated PS assets.
NOTE 1 "PS" and "DF" are used in IEC 62832 (all parts) as qualifiers, they are part of the concept names. See
IEC 62832-1:2020, Clause 3.
NOTE 2 Common rules are the base for the exchange of data between and within enterprises, between engineering
tools, and between departments.
SIST EN ISO 10545-15:2021(Main)
Ceramic tiles - Part 15: Determination of lead and cadmium given off by tiles (ISO 10545-15:2021)
Direct acting indicating analogue electrical measuring instruments and their accessories - Part 2: Special requirements for ammeters and voltmeters (IEC 60051-2:2018
IEC 60051-2:2018 applies to direct acting indicating ammeters and voltmeters having an analogue display. It also applies to: • direct acting indicating ammeters and voltmeters whose scale marks do not correspond directly to their electrical input quantity, provided that the relationship between them is known; • direct acting indicating ammeters and voltmeters and accessories having electronic devices in their measuring and/or auxiliary circuits. This document does not apply to: • special purpose instruments which are covered by their own IEC standards; • special purpose devices which are covered by their own IEC standards when they are used as accessories. IEC 60051-2:2018 cancels and replaces the fourth edition published in 1984. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) updating of content in line with new editions of IEC 60051-1 and IEC 60051-9; b) addition of Annex A to specify the nonconformity classification of test item. This International Standard is to be used in conjunction with IEC 60051-1:2016.
2014/35/EU
Stationary training equipment - Part 2: Strength training equipment, additional specific safety requirements and test methods (ISO 20957-2:2020)
This part of ISO 20957 specifies additional safety requirements for stationary strength training equipment in addition to the general safety requirements of ISO 20957-1.
This part of ISO 20957 is applicable to stationary training equipment type strength training equipment with stack weight resistance or other means of resistance like elastic cords, hydraulic, pneumatic, electrical, magnetic, springs and externally loaded weights (type 2) (hereinafter referred to as training equipment) with the classes H, S and I according to ISO 20957-1.
NOTE Free-weight barbell racks are subject to the requirements of ISO 20957-4 and ISO 20957-1.
2001/95/EC
Plastics piping systems for pressure and non-pressure water supply, drainage or sewerage - Glass-reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin (ISO 23856:2021)
This document specifies the properties of piping system components made from glass-reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP). It is suited for all types of water supply, drainage and sewerage with or without pressure. Types of water supply include, but are not limited to, raw water, irrigation, cooling water, potable water, salt water, sea water, penstocks in power plants, processing plants and other water-based applications. This document is applicable to GRP UP piping systems, with flexible or rigid joints with or without end thrust load-bearing capability, primarily intended for use in direct buried installations.
Stationary training equipment - Part 7: Rowing equipment, additional specific safety requirements and test methods (ISO 20957-7:2020)
This part of ISO 20957 specifies safety requirements for rowing equipment in addition to the general safety requirements of ISO 20957-1 and should be read in conjunction with it.
This part of ISO 20957 is applicable to rowing type stationary training equipment, hereinafter referred to as rowing equipment, within the classes H, S and I as well as classes A, B and C regarding accuracy.
SIST EN IEC 61010-2-091:2021(Main)
Safety requirements for electrical equipment for measurement, control and laboratory use - Part 2-091: Particular requirements for cabinet X-ray systems (IEC 61010-2-091:2019)
EN IEC 61010-2-091:2021
EN-IEC 61010-2-091 specifies particular safety requirements for cabinet X-ray systems, which fall under any of categories a), b) or c) below. Equipment covered by this document can be both PROTECTED EQUIPMENT or PARTIALLY PROTECTED EQUIPMENT, with X-ray generator voltage up to 500 kV. A cabinet X-ray system is a system that contains an X-ray tube installed in a cabinet, which, independently of existing architectural structures except the floor on which it may be placed, is intended to contain at least that portion of a material being irradiated, provide radiation attenuation and prevent operator access to the radiation beam, during generation of X-radiation. These cabinet X-ray systems are used in industrial, commercial, and public environments, for example, to inspect materials, to analyse materials, and to screen baggage.
Direct acting indicating analogue electrical measuring instruments and their accessories - Part 9: Recommended test methods (IEC 60051-9:2019)
IEC 60051-9:2019 applies to direct acting indicating analogue electrical measuring instruments and their accessories and gives guidance for applicable test methods and for the performance of test equipment. This document does not apply to: – special purpose instruments that are covered by their own IEC International Standards; – special purpose devices that are covered by their own IEC International Standards when they are used as accessories. IEC 60051-9:2018 cancels and replaces the fourth edition published in 1988, Amendment 1:1994 and Amendment 2:1995. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) adding performance requirements for test equipment; b) updating the references to the applicable standards for test methods.