EN 62555:2014

Ultrasonics - Power measurement - High intensity therapeutic ultrasound (HITU) transducers and systems

IEC 62555:2013 establishes general principles relevant to HITU fields for the use of radiation force balances in which an obstacle (target) intercepts the sound field to be measured; specifies a calorimetric method of determining the total emitted acoustic power of ultrasonic transducers based on the measurement of thermal expansion of a fluid-filled target; specifies requirements related to the statement of electrical power characteristics of ultrasonic transducers; provides guidance related to the avoidance of acoustic cavitation during measurement; provides guidance related to the measurement of HITU transducers of different construction and geometry, including collimated, diverging and convergent transducers, and multi-element transducers; provides guidance on the choice of the most appropriate measurement method; and provides information on assessment of overall measurement uncertainties. This International Standard is applicable to the measurement of ultrasonic power generated by HITU equipment up to 500 W in the frequency range from 0,5 MHz to 5 MHz. HITU equipment may generate convergent, collimated or divergent fields. For frequencies less than 500 kHz, no validations exist and the user should assess the uncertainties of the power measurement and measurement system at the frequencies of operation. This International Standard does not apply to ultrasound equipment used for physiotherapy, for lithotripsy for general pain relief.

Ultraschall - Leistungsmessung - Hochintensive, therapeutische Ultraschallwandler und -systeme (HITU)

Ultrasons - Mesurage de puissance - Transducteurs et systèmes ultrasonores thérapeutiques de haute intensité (HITU)

La IEC 62555:2013 établit les principes généraux, applicables aux champs HITU, permettant d'utiliser les balances de forces de rayonnement dans lesquelles un obstacle (cible) intercepte le champ acoustique à mesurer; spécifie une méthode calorimétrique de détermination de la puissance acoustique totale émise par des transducteurs ultrasonores, en se fondant sur le mesurage de la dilatation thermique d'un fluide cible; spécifie les exigences relatives à la déclaration des caractéristiques de la puissance électrique des transducteurs ultrasonores; fournit des recommandations permettant d'éviter la cavitation acoustique au cours du mesurage; donne des lignes directrices pour le mesurage des transducteurs HITU de différentes constructions et géométries, y compris les transducteurs non focalisants, divergents et focalisants ainsi que les transducteurs à éléments multiples; fournit des recommandations quant au choix de la méthode de mesurage la plus appropriée; et fournit des informations concernant l'évaluation des incertitudes de mesure globales. La présente Norme Internationale s'applique au mesurage de la puissance ultrasonore générée par des appareils HITU, atteignant jusqu'à 500 W, dans la gamme des fréquences de 0,5 MHz à 5 MHz. Les appareils HITU peuvent générer des champs focalisés, non focalisés ou divergents. Il n'existe aucune validation pour les fréquences inférieures à 500 kHz. Il convient que l'utilisateur évalue les incertitudes de mesure de la puissance et du système de mesure aux fréquences de fonctionnement utilisées. La présente Norme internationale ne s'applique pas aux appareils à ultrasons utilisés pour la physiothérapie, pour la lithotritie ou pour soulager la douleur de manière générale.

Ultrazvok - Merjenje moči - Merjenje izhodne moči visokointenzivnih terapevtskih ultrazvočnih (HITU) pretvornikov in sistemov (IEC 62555:2013)

Standard EN-IEC 62555 uvaja splošna načela, pomembna za polja HITU, za uporabo ravnotežij sil sevanja, pri katerih ovira (tarča) prestreže zvočno polje, ki je predmet meritve; - določa kalorimetrično metodo za določanje skupne oddane akustične moči ultrazvočnih pretvornikov glede na merjenje toplotnega raztezanja tarč, napolnjenih s tekočino; - določa zahteve, povezane z izjavo o lastnostih električne moči ultrazvočnih pretvornikov; - nudi navodila, povezana s preprečevanjem akustične kavitacije med meritvijo; - nudi navodila, povezana z meritvijo pretvornikov HITU različnih oblik in sestavljenih na različne načine, vključno s kolimiranimi, divergentnimi in konvergentnimi pretvorniki; - nudi navodila glede izbire najbolj primerne meritvene metode; - nudi informacije glede ocenjevanja merilnih negotovosti. Ta mednarodni standard velja za merjenje ultrazvočne moči do 500 W v frekvenčnem območju od 0,5 MHz do 5 MHz, ki jo proizvaja oprema HITU. Oprema HITU lahko proizvaja konvergentna, divergentna ali kolimirana polja. Za frekvence, nižje od 500 kHz, ni preverjenih meritev, in uporabnik mora oceniti merilne negotovosti postopka merjenja moči in meritvenega sistema pri delovnih frekvencah. Ta mednarodni standard se ne uporablja za: - ultrazvočno opremo, ki se jo uporablja pri fizioterapiji za postopek litotripsije, ki blaži bolečine.

General Information

• Status: Published
• Publication Date: 24-Apr-2014
• Withdrawal Date: 23-Dec-2016
• ICS: 17.140.50 - Electroacoustics
• Technical Committee: CLC/SR 87 - CLC/SR 87
• Drafting Committee: IEC/TC 87 - IEC_TC_87
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 25-Apr-2014
• Completion Date: 25-Apr-2014
• Ref Project: SIST EN 62555:2014 - Ultrasonics - Power measurement - Output power measurement for high intensity therapeutic ultrasound (HITU) transducers and systems

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2014
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XOWUD]YRþQLK+,78SUHWYRUQLNRYLQVLVWHPRY,(&
Ultrasonics - Power measurement - Output power measurement for high intensity
therapeutic ultrasound (HITU) transducers and systems
/
Ultrasons - Mesurage de puissance - Transducteurs et systèmes ultrasonores
thérapeutiques de haute intensité (HITU)
Ta slovenski standard je istoveten z: EN 62555:2014
ICS:
17.140.50 Elektroakustika Electroacoustics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62555
NORME EUROPÉENNE
April 2014
EUROPÄISCHE NORM
ICS 17.140.50
English version
Ultrasonics -
Power measurement -
High intensity therapeutic ultrasound (HITU) transducers and systems
(IEC 62555:2013)
Ultrasons -  Ultraschall -
Mesurage de puissance - Leistungsmessung -
Transducteurs et systèmes ultrasonores Messung der Ausgangsleistung für
thérapeutiques de haute intensité (HITU) hochintensive, therapeutische
(CEI 62555:2013) Ultraschallwandler und -systeme
(IEC 62555:2013)
This European Standard was approved by CENELEC on 2013-12-24. 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, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2014 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62555:2014 E
Foreword
The text of document 87/538/FDIS, future edition 1 of IEC 62555, prepared by IEC TC 87 "Ultrasonics"
was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62555:2014.
The following dates are fixed:
• latest date by which the document has (dop) 2014-10-25
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2016-12-24
standards conflicting with the
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 [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 62555:2013 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 62127-2 NOTE  Harmonized as EN 62127-2
IEC 60601-2-62 NOTE  Harmonized as EN 60601-2-62

- 3 - EN 62555:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 61161 2013 Ultrasonics - Power measurement - Radiation EN 61161 2013
force balances and performance requirements

IEC/TR 62781 Ultrasonics - Conditioning of water for - -
ultrasonic measurements
IEC 62555 ®
Edition 1.0 2013-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ultrasonics – Power measurement – High intensity therapeutic ultrasound (HITU)

transducers and systems
Ultrasons – Mesurage de puissance – Transducteurs et systèmes ultrasonores

thérapeutiques de haute intensité (HITU)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XA
ICS 17.140.50 ISBN 978-2-8322-1163-2

– 2 – 62555 © IEC:2013
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 List of symbols . 11
5 Power measurement for HITU equipment. 12
6 Radiation force on a target . 13
6.1 General . 13
6.2 Requirements for equipment . 14
6.2.1 Target type . 14
6.2.2 Target diameter . 15
6.2.3 Balance / force measuring system . 15
6.2.4 System tank . 15
6.2.5 Target support structures . 15
6.2.6 Transducer positioning . 15
6.2.7 Anti-streaming foils . 15
6.2.8 Transducer coupling . 16
6.2.9 Calibration and stability . 16
6.3 Requirements for measuring conditions . 16
6.3.1 Lateral target position . 16
6.3.2 Transducer/target separation . 16
6.3.3 Water . 16
6.3.4 Water contact . 17
6.3.5 Environmental conditions . 17
6.3.6 Thermal drifts . 17
6.4 Measurement uncertainty . 17
6.4.1 General . 17
6.4.2 Non-planar ultrasound field . 17
6.4.3 Balance system with target suspension. 17
6.4.4 Linearity and resolution of the balance system . 17
6.4.5 Extrapolation to the moment of switching the ultrasonic
transducer . 18
6.4.6 Target imperfections . 18
6.4.7 Reflecting target geometry . 18
6.4.8 Lateral absorbers in the case of reflecting target
measurements . 18
6.4.9 Target misalignment . 18
6.4.10 Ultrasonic transducer misalignment . 18
6.4.11 Water temperature . 18
6.4.12 Ultrasonic attenuation and acoustic streaming . 19
6.4.13 Foil properties . 19
6.4.14 Finite target size . 19
6.4.15 Environmental influences . 19
6.4.16 Excitation voltage measurement . 19
6.4.17 Ultrasonic transducer temperature . 19
6.4.18 Nonlinearity . 19

62555 © IEC:2013 – 3 –
6.4.19 Other sources . 19
6.5 Calculation of output power . 20
7 Buoyancy change of a target . 20
7.1 General . 20
7.2 Requirements for equipment . 21
7.2.1 Target type . 21
7.2.2 Entry window diameter . 22
7.2.3 Balance / force measuring system . 22
7.2.4 System tank . 22
7.2.5 Target support structures . 22
7.2.6 Transducer positioning . 22
7.2.7 Anti-streaming foils . 22
7.2.8 Transducer coupling . 23
7.2.9 Calibration . 23
7.3 Requirements for measuring conditions . 23
7.3.1 Lateral target position . 23
7.3.2 Transducer/Target separation . 23
7.3.3 Water . 23
7.3.4 Water contact . 24
7.3.5 Environmental conditions . 24
7.3.6 Thermal drifts . 24
7.4 Measurement uncertainty . 24
7.4.1 General . 24
7.4.2 Buoyancy sensitivity . 24
7.4.3 Non-planar ultrasound field . 24
7.4.4 Balance system including target suspension . 24
7.4.5 Linearity and resolution of the balance system . 24
7.4.6 Curve-fitting and extrapolation . 25
7.4.7 Water temperature . 25
7.4.8 Ultrasonic attenuation and acoustic streaming . 25
7.4.9 Foil properties . 25
7.4.10 Finite target size . 25
7.4.11 Environmental influences . 25
7.4.12 Excitation voltage measurement . 25
7.4.13 Ultrasonic transducer temperature . 26
7.4.14 Nonlineari
...