Determination of the permanent filtration of X-ray tube assemblies

Defines the concept of permanent filtration in X-ray tube assemblies for medical diagnosis and radiotherapy and describes a method for its determination. It contains requirements for statements of compliance for accompanying documents and for markings on X-ray tube assemblies. Methods are given to determine the permanent filtration in an X-ray tube assembly with an accuracy that is sufficient to enable the appropriate additional filtration to be provided in order to attain the desired total filtration.

Détermination de la filtration permanente des gaines équipées

Cette norme définit le concept de filtration permanente dans les gaines équipées pour le diagnostic médical et la radiothérapie et elle décrit une méthode pour sa détermination. Elle contient des prescriptions pour des déclarations de conformité, pour les documents d'accompagnement et pour les marquages sur les gaines équipées. Les méthodes sont données pour déterminer la filtration permanente dans une gaine équipée avec une précision qui est suffisante pour permettre à la filtration additionnelle appropriée d'être fournie afin d'atteindre la filtration totale désirée.

General Information

Status
Replaced
Publication Date
09-Feb-1999
Drafting Committee
MT 32 - TC 62/SC 62B/MT 32
Current Stage
DELPUB - Deleted Publication
Start Date
04-Dec-2020
Completion Date
02-Feb-2018

Relations

Effective Date
05-Sep-2023
Standard

IEC 60522:1999 - Determination of the permanent filtration of X-ray tube assemblies Released:2/10/1999 Isbn:2831846889

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IEC 60522:1999 - Determination of the permanent filtration of X-ray tube assemblies

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Frequently Asked Questions

IEC 60522:1999 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Determination of the permanent filtration of X-ray tube assemblies". This standard covers: Defines the concept of permanent filtration in X-ray tube assemblies for medical diagnosis and radiotherapy and describes a method for its determination. It contains requirements for statements of compliance for accompanying documents and for markings on X-ray tube assemblies. Methods are given to determine the permanent filtration in an X-ray tube assembly with an accuracy that is sufficient to enable the appropriate additional filtration to be provided in order to attain the desired total filtration.

Defines the concept of permanent filtration in X-ray tube assemblies for medical diagnosis and radiotherapy and describes a method for its determination. It contains requirements for statements of compliance for accompanying documents and for markings on X-ray tube assemblies. Methods are given to determine the permanent filtration in an X-ray tube assembly with an accuracy that is sufficient to enable the appropriate additional filtration to be provided in order to attain the desired total filtration.

IEC 60522:1999 is classified under the following ICS (International Classification for Standards) categories: 11.040.50 - Radiographic equipment. The ICS classification helps identify the subject area and facilitates finding related standards.

IEC 60522:1999 has the following relationships with other standards: It is inter standard links to IEC 60522-1:2020. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

IEC 60522:1999 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


INTERNATIONAL IEC
STANDARD
Second edition
1999-02
Determination of the permanent filtration
of X-ray tube assemblies
Détermination de la filtration permanente
des gaines équipées
Reference number
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series.
Consolidated publications
Consolidated versions of some IEC publications including amendments are

available. For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the
base publication, the base publication incorporating amendment 1 and the base

publication incorporating amendments 1 and 2.

Validity of this publication
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology.
Information relating to the date of the reconfirmation of the publication is available
in the IEC catalogue.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is to be found at the following IEC sources:
• IEC web site*

Catalogue of IEC publications
Published yearly with regular updates
(On-line catalogue)*
• IEC Bulletin
Available both at the IEC web site* and as a printed periodical
Terminology, graphical and letter symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.

INTERNATIONAL IEC
STANDARD
Second edition
1999-02
Determination of the permanent filtration
of X-ray tube assemblies
Détermination de la filtration permanente
des gaines équipées
 IEC 1999  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
J
International Electrotechnical Commission
For price, see current catalogue

– 2 – 60522 © IEC:1999(E)
CONTENTS
Page
FOREWORD 3
..........................................................................................................................

Clause
1 Scope and object 5
.............................................................................................................

1.1 Scope 5
.....................................................................................................................

1.2 Object 5
.....................................................................................................................

2 Normative references 5
.......................................................................................................
3 Terminology 6
.....................................................................................................................
3.1 Degree of requirements 6
...........................................................................................
3.2 Use of terms 6
...........................................................................................................
3.3 Defined terms 6
.........................................................................................................
4 Measurement of PERMANENT FILTRATION 6
............................................................................
4.1 General 6
...................................................................................................................
4.2 Test sample 7
............................................................................................................
RAY BEAM
4.3 Generation of the X- for measurement 7
......................................................
ADIATION DETECTOR
4.4 R 7
...............................................................................................
4.5 Composition of reference materials 7
.........................................................................
4.6 Method of measurement 7
..........................................................................................
5 Indications and statements of PERMANENT FILTRATION 8
........................................................
Annex A (normative) Terminology – Index of defined terms 9
.....................................................

60522 © IEC:1999(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
DETERMINATION OF THE PERMANENT FILTRATION

OF X-RAY TUBE ASSEMBLIES
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60522 has been prepared by subcommittee 62B: Diagnostic
imaging equipment, of IEC technical committee 62: Electrical equipment in medical practice.
This second edition cancels and replaces the first edition published in 1976 and constitutes a
technical revision.
The text of this standard is based on the following documents:
FDIS Report of voting
62B/359/FDIS 62B/363/RVD
Full information on the voting for the approval of this standard can be found in the report of
voting indicated in the above table.
Annex A forms an integral part of this standard.

– 4 – 60522 © IEC:1999(E)
In this standard, the following print types are used:

– requirements, compliance with which can be tested and definitions: roman type;

– explanations, advice, notes, general statements, exceptions and references: smaller type;

– test specifications and headings of subclauses: italic type;

– TERMS DEFINED IN CLAUSE 3 OF THIS STANDARD, IN CLAUSE 2 OF IEC 60601-1, IN IEC 60788 OR IN

ANNEX A: SMALL CAPITALS.
NOTE – Attention is drawn to the existence, in some countries, of legislation concerning RADIATION safety which

may not align with the provisions of this standard.

A bilingual version of this standard may be issued at a later date.

60522 © IEC:1999(E) – 5 –
DETERMINATION OF THE PERMANENT FILTRATION

OF X-RAY TUBE ASSEMBLIES
1 Scope and object
1.1 Scope
This International Standard applies to X-RAY TUBE ASSEMBLIES for medical diagnosis and

RADIOTHERAPY.
1.2 Object
PERMANENT FILTRATION RAY TUBE ASSEMBLIES
This standard defines the concept of in X- for
medical diagnosis and RADIOTHERAPY and describes a method for its determination. It contains
requirements for statements of compliance for ACCOMPANYING DOCUMENTS and for markings on
X-RAY TUBE ASSEMBLIES.
Methods are given to determine the PERMANENT FILTRATION in an X-RAY TUBE ASSEMBLY with an
accuracy that is sufficient to enable the appropriate ADDITIONAL FILTRATION to be provided in
order to attain the desired TOTAL FILTRATION.
NOTE 1 – This standard does not contain requirements for any specific values of PERMANENT FILTRATION or TOTAL
FILTRATION to be provided. For X-RAY TUBE ASSEMBLIES and X-RAY EQUIPMENT used for diagnostic purposes,
appropriate requirements are given in IEC 60601-1-3.
NOTE 2 – The method of determination described in this standard is suitable as a type test. It is not intended as a
test to be applied by the USER.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this International Standard. At the time of publication, the editions
indicated were valid. All normative documents are subject to revision, and parties to
agreements based on this International Standard are encouraged to investigate the possibility
of applying the most recent editions of the normative documents indicated below. Members of
IEC and ISO maintain registers of currently valid International Standards.
IEC 60601-1:1988, Medical electrical equipment – Part 1: General requirements for safety

Amendment No. 1 (1991)
Amendment No. 2 (1995)
IEC 60601-1-3:1994, Medical electrical equipment – Part 1: General requirements for safety –
3. Collateral Standard: General requirements for radiation protection in diagnostic X-ray
equipment
IEC 60788:1984, Medical radiology – Terminology
ISO 2092:1981, Light metals and their alloys – Code of designation based on chemical symbols

– 6 – 60522 © IEC:1999(E)
3 Terminology
3.1 Degree of requirements
In this standard, certain terms which are not printed in SMALL CAPITALS have particular

meanings, as follows:
– "shall" indicates a requirement that is mandatory for compliance;

– "should" indicates a strong recommendation that is not mandatory for compliance;

– "may" indicates a permitted manner of complying with a requirement or of avoiding
the need to comply;
– "specific" is used to indicate definitive information stated in this standard or referenced
in other standards, usually concerning particular operating conditions, test
arrangements or values connected with compliance;
– "specified" is used to indicate definitive information stated by the MANUFACTURER in
ACCOMPANYING DOCUMENTS or in other documentation relating to the equipment
under consideration, usually concerning its intended purposes, or the
parameters or conditions associated with its use or with testing to determine
compliance.
3.2 Use of terms
In this standard, terms printed in SMALL CAPITALS are used in accordance with their definitions
in this standard, in IEC 60601-1, or in IEC 60788.
NOTE – Where terms having definitions in the publication listed above are not printed in small capitals, the
definitions do not apply and the meaning is determined by the context.
An index of defined terms used in this standard is given in annex A.
3.3 Defined terms
For the purpose of this standard, the following additional definition applies.
PERMANENT FILTRATION: The QUALITY EQUIVALENT FILTRATION effected in an X-RAY TUBE
3.3.1
ASSEMBLY by permanently fixed materials intercepting the X-RAY BEAM, that are not intended to
be removed for any application and are not provided with means for removal in NORMAL USE.
PERMANENT FILTRATION
4 Measurement of
When, in accordance with the requirements in clause 5, the PERMANENT FILTRATION is to be
expressed in terms of the actual filtering material (e.g. beryllium), the nature and thickness of
the material present shall be determined or verified by inspection. In other cases, the following
test shall be used to determine the PERMANENT FILTRATION of an X-RAY TUBE ASSEMBLY to be
indicated or stated in accordance with this standard.
4.1 General
The PERMANENT FILTRATION is determined by measuring the QUALITY EQUIVALENT FILTRATION of
samples of the permanently fixed materials, used in the construction of the X-RAY TUBE
ASSEMBLY, that intercept the X-RAY BEAM. Where appropriate, a composite sample replicating
the combination of the various materials and their thicknesses, as actually used in the
construction, can be tested. Alternatively, the PERMANENT FILTRATION can be computed from
measurements on samples of the individual materials concerned, provided that:

60522 © IEC:1999(E) – 7 –
– the reference material
...


IEC 60522
Edition 2.0 1999-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Determination of the permanent filtration of X-ray tube assemblies

Détermination de la filtration permanente des gaines équipées

Copyright © 1999 IEC, Geneva, Switzerland

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IEC 60522
Edition 2.0 1999-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Determination of the permanent filtration of X-ray tube assemblies

Détermination de la filtration permanente des gaines équipées

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
J
CODE PRIX
ICS 11.040.50 ISBN 2-8318-7315-0
– 2 – 60522 © CEI:1999
SOMMAIRE
AVANT-PROPOS .4

1 Domaine d’application et objet .8
1.1 Domaine d’application.8
1.2 Objet.8
2 Références normatives .8
3 Terminologie.10
3.1 Degré d’exigences .10
3.2 Utilisation de termes .10
3.3 Termes définis.10
4 Mesure de la FILTRATION PERMANENTE.10
4.1 Généralités.12
4.2 Echantillon d'essai.12
4.3 Emission du FAISCEAU DE RAYONNEMENT X pour la mesure .12
4.4 DETECTEUR DE RAYONNEMENT.12
4.5 Composition des matériaux de référence .14
4.6 Méthode de mesure .14
5 Indications et déclarations de FILTRATION PERMANENTE.14

Annexe A (normative) Terminologie – Index des termes définis .16

60522 © IEC:1999 – 3 –
CONTENTS
FOREWORD.3

1 Scope and object .9
1.1 Scope.9
1.2 Object .9
2 Normative references.9
3 Terminology.11
3.1 Degree of requirements .11
3.2 Use of terms.11
3.3 Defined terms.11
4 Measurement of PERMANENT FILTRATION .11
4.1 General .13
4.2 Test sample.13
RAY BEAM for measurement .13
4.3 Generation of the X-
4.4 RADIATION DETECTOR.13
4.5 Composition of reference materials.15
4.6 Method of measurement .15
5 Indications and statements of PERMANENT FILTRATION .15

Annex A (normative) Terminology – Index of defined terms.17

– 4 – 60522 © CEI:1999
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
___________
DÉTERMINATION DE LA FILTRATION PERMANENTE
DES GAINES EQUIPÉES
AVANT-PROPOS
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de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a pour objet de
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La Norme internationale CEI 60522 a été établie par le sous-comité 62B: Appareils d'imagerie
de diagnostic, du comité d’études 62 de la CEI: Equipements électriques dans la pratique
médicale.
Cette deuxième édition annule et remplace la première édition publiée en 1976. Elle constitue
une révision technique.
Cette version bilingue, publiée en 2003-12, correspond à la version anglaise.

60522 © IEC:1999 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
DETERMINATION OF THE PERMANENT FILTRATION
OF X-RAY TUBE ASSEMBLIES
FOREWORD
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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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 60522 has been prepared by subcommittee 62B: Diagnostic
imaging equipment, of IEC technical committee 62: Electrical equipment in medical practice.
This second edition cancels and replaces the first edition published in 1976 and constitutes a
technical revision.
This bilingual version, published in 2003-12, corresponds to the English version.

– 6 – 60522 © CEI:1999
Le texte anglais de cette norme est basé sur les documents 62B/359/FDIS et 62B/363/RVD.
Le rapport de vote 62B/363/RVD donne toute information sur le vote ayant abouti à
l’approbation de cette norme.
Cette publication a été rédigée selon les Directives ISO/CEI, Partie 2.
Dans la présente norme, les caractères d’imprimerie suivants sont utilisés:
– les exigences dont la conformité peut être vérifiée par un essai et définitions: caractères
romains;
– les explications, conseils, notes, énoncés de portée générale, exceptions et références: petits caractères;
– spécifications d'essai et titres des paragraphes: caractères italiques;
– TERMES DEFINIS A L’ARTICLE 3 DE LA PRESENTE NORME, A L’ARTICLE 2 DE LA CEI 60601-1, DANS LA
CEI 60788 OU DANS L’ANNEXE A: PETITES MAJUSCULES.
NOTE L'attention est attirée sur l’existence d’une législation, dans certains pays, concernant la sécurité en
matière de RAYONNEMENTS qui peut ne pas s’aligner avec les dispositions de la présente norme.

60522 © IEC:1999 – 7 –
The text of this standard is based on the following documents:
FDIS Report of voting
62B/359/FDIS 62B/363/RVD
Full information on the voting for the approval of this standard can be found in the report of
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
In this standard, the following print types are used:
– requirements, compliance with which can be tested and definitions: roman type;
– explanations, advice, notes, general statements, exceptions and references: smaller type;
– test specifications and headings of subclauses: italic type;
– TERMS DEFINED IN CLAUSE 3 OF THIS STANDARD, IN CLAUSE 2 OF IEC 60601-1, IN IEC 60788 OR IN
ANNEX A: SMALL CAPITALS.
NOTE Attention is drawn to the existence, in some countries, of legislation concerning RADIATION safety which may
not align with the provisions of this standard.
The French version of this standard has not been voted upon.

– 8 – 60522 © CEI:1999
DÉTERMINATION DE LA FILTRATION PERMANENTE
DES GAINES ÉQUIPÉES
1 Domaine d’application et objet
1.1 Domaine d’application
La présente Norme internationale s’applique aux GAINES EQUIPEES pour le diagnostic médical et
la RADIOTHERAPIE.
1.2 Objet
La présente norme définit le concept de FILTRATION PERMANENTE dans les GAINES EQUIPEES
pour le diagnostic médical et la RADIOTHERAPIE et elle décrit une méthode pour sa
détermination. Elle contient des prescriptions pour des déclarations de conformité, pour les
DOCUMENTS D’ACCOMPAGNEMENT et pour les marquages sur les GAINES EQUIPEES.
Les méthodes sont données pour déterminer la FILTRATION PERMANENTE dans une GAINE
EQUIPEE avec une précision qui est suffisante pour permettre à la FILTRATION ADDITIONNELLE
appropriée d’être fournie afin d’atteindre la FILTRATION TOTALE désirée.
NOTE 1 La présente norme ne contient de prescriptions pour aucune valeur spécifique de FILTRATION PERMANENTE
ou de FILTRATION TOTALE à fournir. Pour les GAINES EQUIPEES et les APPAREILS A RAYONNEMENT X utilisés pour le
diagnostic, les prescriptions appropriées sont fournies dans la CEI 60601-1-3
NOTE 2 La méthode de détermination décrite dans la présente norme est appropriée en tant qu’essai de type. Elle
n’est pas prévue comme un essai devant être appliqué par l’UTILISATEUR.
2 Références normatives
Les documents de référence suivants sont indispensables pour l'application du présent
document. Pour les références datées, seule l'édition citée s'applique. Pour les références non
datées, la dernière édition du document de référence s'applique (y compris les éventuels
amendements).
CEI 60601-1:1988, Appareils électromédicaux – Première partie : Règles générales de sécurité
o
Amendement n 1 (1991)
o
Amendement n 2 (1995)
CEI 60601-1-3:1994, Appareils électromédicaux – Partie 1:Règles générales de sécurité –
3. Norme Collatérale: Règles générales pour la radioprotection dans les équipements à
rayonnement X de diagnostic
CEI 60788:1984, Radiologie médicale - Terminologie
ISO 2092:1981, Métaux légers et leurs alliages – Code de désignation basé sur les symboles
chimiques
60522 © IEC:1999 – 9 –
DETERMINATION OF THE PERMANENT FILTRATION
OF X-RAY TUBE ASSEMBLIES
1 Scope and object
1.1 Scope
This International Standard applies to X-RAY TUBE ASSEMBLIES for medical diagnosis and
RADIOTHERAPY.
1.2 Object
This standard defines the concept of PERMANENT FILTRATION in X-RAY TUBE ASSEMBLIES for
medical diagnosis and RADIOTHERAPY and describes a method for its determination. It contains
requirements for statements of compliance for ACCOMPANYING DOCUMENTS and for markings on
X-RAY TUBE ASSEMBLIES.
Methods are given to determine the PERMANENT FILTRATION in an X-RAY TUBE ASSEMBLY with an
accuracy that is sufficient to enable the appropriate ADDITIONAL FILTRATION to be provided in
order to attain the desired TOTAL FILTRATION.
NOTE 1 This standard does not contain requirements for any specific values of PERMANENT FILTRATION or TOTAL
FILTRATION to be provided. For X-RAY TUBE ASSEMBLIES and X-RAY EQUIPMENT used for diagnostic purposes,
appropriate requirements are given in IEC 60601-1-3.
NOTE 2 The method of determination described in this standard is suitable as a type test. It is not intended as a
test to be applied by the USER.
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.
IEC 60601-1:1988, Medical electrical equipment – Part 1: General requirements for safety
Amendment No. 1 (1991)
Amendment No. 2 (1995)
IEC 60601-1-3:1994, Medical electrical equipment – Part 1: General requirements for safety –
3. Collateral Standard: General requirements for radiation protection in diagnostic X-ray
equipment
IEC 60788:1984, Medical radiology – Terminology
ISO 2092:1981, Light metals and their alloys – Code of designation based on chemical symbols

– 10 – 60522 © CEI:1999
3 Terminologie
3.1 Degré d’exigences
Dans la présente norme, certains termes qui ne sont pas imprimés en PETITES MAJUSCULES ont
des significations particulières, comme les suivantes:
– "doit" indique une prescription qui est obligatoire en vue de la conformité;
– "il convient" indique une forte recommandation qui n’est pas obligatoire en vue de la
conformité;
– "peut" indique une manière autorisée d’être conforme à une prescription ou d’éviter la
nécessité d’être conforme;
– "spécifique" est utilisé pour indiquer des informations définitives figurant dans la présente
norme ou référencées dans d’autres normes, concernant habituellement des
conditions de fonctionnement particulières, des dispositifs d'essai particuliers
ou des valeurs particulières en relation avec la conformité;
– "spécifié" est utilisé pour indiquer des informations définitives fournies par le
CONSTRUCTEUR dans les DOCUMENTS d’ACCOMPAGNEMENT ou dans toute autre
documentation liée à l’appareil considéré, concernant habituellement la
fonction à laquelle il est destiné, ou les paramètres ou les conditions associés
à son utilisation ou aux essais pour la détermination de la conformité.
3.2 Utilisation de termes
Dans la présente norme, des termes imprimés en PETITES MAJUSCULES sont utilisés
conformément à leurs définitions dans la présente norme, dans la CEI 60601-1, ou dans la
CEI 60788.
NOTE Lorsque des termes ayant des définitions dans la publication indiquée ci-dessus ne sont pas imprimés en
petites majuscules, les définitions ne s’appli
...

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