EN IEC 62127-2:2025
(Main)Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields
Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields
IEC 62127-2:2025 specifies: - absolute hydrophone calibration methods; - relative (comparative) hydrophone calibration methods. Recommendations and references to accepted literature are made for the various relative and absolute calibration methods in the frequency range covered by this document. This document is applicable to - hydrophones used for measurements made in water and in the ultrasonic frequency range 50 kHz to 100 MHz; - hydrophones employing piezoelectric sensor elements, designed to measure the pulsed wave and continuous wave ultrasonic fields generated by ultrasonic equipment; - hydrophones with or without a hydrophone pre-amplifier. IEC 62127-2:2025 cancels and replaces the first edition published in 2007, Amendment 1:2013 and Amendment 2:2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the upper frequency limit of 40 MHz has been removed; b) hydrophone sensitivity definitions have been changed to recognize sensitivities as complex-valued quantities; c) directional response measurement and effective size determination procedures have been updated in 12.5.1 to align with recent changes in IEC 62127-3; d) Annex F has been amended to comprise a calibration technique for high-frequency complex-valued calibration; e) the reciprocity method description in Annex K was extended to also comprise focusing transducers.
Ultraschall - Hydrophone - Teil 2: Kalibrierung für Ultraschallfelder
Ultrasons - Hydrophones - Partie 2: Etalonnage des champs ultrasoniques
L'IEC 60601-2-40:2025 s'applique à la SECURITE DE BASE et aux PERFORMANCES ESSENTIELLES des ELECTROMYOGRAPHES et des APPAREILS A POTENTIEL EVOQUE, désignés ci-après sous le terme APPAREILS EM. Si un article ou un paragraphe est spécifiquement destiné à être applicable uniquement aux APPAREILS EM, ou uniquement aux SYSTEMES EM, le titre et le contenu de cet article ou de ce paragraphe l’indiquent. Si cela n’est pas le cas, l’article ou le paragraphe s’applique à la fois aux APPAREILS EM et aux SYSTEMES EM, selon le cas. Les APPAREILS EM suivants sont exclus de la liste: - APPAREILS EM destinés à une application thérapeutique; - APPAREILS EM destinés à être utilisés avec les neurostimulateurs électriques transcutanés et les stimulateurs musculaires électriques (APPAREILS EM couverts par l'IEC 60601-2-10). L'IEC 60601-2-40:2024 annule et remplace la deuxième édition parue en 2016. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) des exigences relatives aux stimulateurs à tension constante ont été ajoutées; b) des exigences relatives aux STIMULATEURS VISUELS ont été clarifiées. L'IEC 62127-2:2024 spécifie: - les méthodes d'étalonnage absolues de l'hydrophone; - les méthodes d'étalonnage (comparatives) relatives de l'hydrophone. Des recommandations et des références à des documents validés sont indiquées pour les différentes méthodes d'étalonnage relatif et absolu dans la plage de fréquences couverte par le présent document. Le présent document s'applique: - aux hydrophones utilisés pour des mesurages réalisés dans l'eau et dans la plage de fréquences ultrasonores comprise entre 50 kHz et 100 MHz; - aux hydrophones qui utilisent des capteurs piézoélectriques, conçus pour mesurer les champs ultrasoniques à ondes pulsées et entretenues, générés par les équipements à ultrasons; - aux hydrophones avec ou sans préamplificateur d'hydrophone. L'IEC 62127-2:2025 annule et remplace la première édition parue en 2007, l'Amendement 1:2013 et l'Amendement 2:2017. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) la limite de fréquence supérieure de 40 MHz a été supprimée; b) les définitions de la sensibilité de l'hydrophone ont été modifiées afin de reconnaître les sensibilités comme des grandeurs à valeur complexe; c) les procédures de mesure de la réponse directionnelle et de détermination de la taille efficace ont été mises à jour au 12.5.1 pour s'aligner sur les modifications récentes de l'IEC 62127-3; d) l'Annexe F a été modifiée pour inclure une technique d'étalonnage pour l'étalonnage à haute fréquence à valeurs complexes; e) la description de la méthode par réciprocité de l'Annexe K a été élargie pour comprendre également les transducteurs à focalisation.
Ultrazvok - Hidrofoni - 2. del: Kalibracija za ultrazvočna polja (IEC 62127-2:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2025
Ultrazvok - Hidrofoni - 2. del: Kalibracija za ultrazvočna polja (IEC 62127-2:2025)
Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields (IEC 62127-2:2025)
Ultraschall - Hydrophone - Teil 2: Kalibrierung für Ultraschallfelder (IEC 62127-2:2025)
Ultrasons - Hydrophones - Partie 2: Etalonnage des champs ultrasoniques (IEC 62127-
2:2025)
Ta slovenski standard je istoveten z: EN IEC 62127-2:2025
ICS:
11.040.01 Medicinska oprema na Medical equipment in general
splošno
17.140.50 Elektroakustika Electroacoustics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 62127-2
NORME EUROPÉENNE
EUROPÄISCHE NORM February 2025
ICS 17.140.50 Supersedes EN 62127-2:2007; EN 62127-
2:2007/A1:2013; EN 62127-2:2007/A2:2017
English Version
Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic
fields
(IEC 62127-2:2025)
Ultrasons - Hydrophones - Partie 2: Etalonnage des Ultraschall - Hydrophone - Teil 2: Kalibrierung für
champs ultrasoniques Ultraschallfelder
(IEC 62127-2:2025) (IEC 62127-2:2025)
This European Standard was approved by CENELEC on 2025-02-11. 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,
Türkiye 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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62127-2:2025 E
European foreword
The text of document 87/878/FDIS, future edition 2 of IEC 62127-2, prepared by TC 87 "Ultrasonics"
was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 62127-
2:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-02-28
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-02-29
document have to be withdrawn
This document supersedes EN 62127-2:2007 and all of its amendments and corrigenda (if any).
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62127-2:2025 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61828:2020 NOTE Approved as EN IEC 61828:2021 (not modified)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 61161 - Ultrasonics - Power measurement - EN 61161 -
Radiation force balances and performance
requirements
IEC 61689 - Ultrasonics - Physiotherapy systems - Field EN IEC 61689 -
specifications and methods of
measurement in the frequency range 0,5
MHz to 5 MHz
IEC 62127-1 - Ultrasonics - Hydrophones - Part 1: EN IEC 62127-1 -
Measurement and characterization of
medical ultrasonic fields
IEC 62127-3 2022 Ultrasonics - Hydrophones - Part 3: EN IEC 62127-3 2023
Properties of hydrophones for ultrasonic
fields
IEC 62127-2 ®
Edition 2.0 2025-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ultrasonics – Hydrophones –
Part 2: Calibration for ultrasonic fields
Ultrasons – Hydrophones –
Partie 2: Etalonnage des champs ultrasoniques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.140.50 ISBN 978-2-8327-0091-4
– 2 – IEC 62127-2:2025 © IEC 2025
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 12
4 List of symbols . 21
5 Overview of calibration procedures . 24
5.1 Principles . 24
5.2 Summary of calibration procedures . 25
5.3 Reporting of results . 26
5.4 Recommended calibration periods . 28
6 Generic requirements of a hydrophone calibration system . 28
6.1 Mechanical positioning . 28
6.1.1 General . 28
6.1.2 Accuracy of the axial hydrophone position . 28
6.1.3 Accuracy of the lateral hydrophone position . 29
6.2 Temperature measurements and temperature stability . 29
6.3 Hydrophone size . 29
6.4 Measurement vessel and water properties . 30
6.5 Measurement of output voltage . 30
7 Electrical considerations . 30
7.1 Signal type . 30
7.2 Earthing . 31
7.3 Measurement of hydrophone output voltage . 31
7.3.1 General . 31
7.3.2 Electrical loading by measuring instrument . 31
7.3.3 Electrical loading by extension cables . 31
7.3.4 Noise . 32
7.3.5 Cross-talk (radio-frequency rf pick-up) and acoustic interference . 32
7.3.6 Integral hydrophone pre-amplifiers . 32
8 Preparation of hydrophones . 32
8.1 General . 32
8.2 Wetting . 32
8.3 Hydrophone support . 32
8.4 Influence of cable . 33
9 Free field reciprocity calibration . 33
9.1 General . 33
9.2 Object . 33
9.3 General principles . 33
9.3.1 General . 33
9.3.2 Three-transducer reciprocity calibration method . 33
9.3.3 Self-reciprocity calibration method . 34
9.3.4 Two-transducer reciprocity calibration method . 34
9.4 Two-transducer reciprocity calibration method . 34
9.4.1 General . 34
9.4.2 Auxiliary transducers . 34
IEC 62127-2:2025 © IEC 2025 – 3 –
9.4.3 Reflector . 35
9.4.4 Measurement field . 35
9.4.5 Reciprocity approach . 35
9.4.6 Measurement procedure . 35
10 Free field calibration by planar scanning . 35
10.1 General . 35
10.2 Object . 36
10.3 General principle . 36
10.4 Procedural requirements . 38
10.4.1 Hydrophone scanning . 38
10.4.2 Power measurement . 38
10.4.3 Transducer mounting . 38
10.4.4 Measurement conditions . 38
10.4.5 Measurements . 39
10.5 Corrections and sources of uncertainty . 39
11 Free field calibration by optical interferometry . 39
11.1 General . 39
11.2 Principle . 39
12 Calibration by comparison using a standard hydrophone . 39
12.1 General . 39
12.2 Object .
...
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