FprEN IEC 62127-2:2024

Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields

Ultraschall - Hydrophone - Teil 2: Kalibrierung für Ultraschallfelder

Ultrasons - Hydrophones - Partie 2: Etalonnage des champs ultrasoniques

Ultrazvok - Hidrofoni - 2. del: Kalibracija za ultrazvočna polja

General Information

• Status: Not Published
• Publication Date: 19-Jan-2025
• ICS: 17.140.50 - Electroacoustics
• Technical Committee: CLC/SR 87 - CLC/SR 87
• Drafting Committee: IEC/TC 87 - IEC_TC_87
• Current Stage: 5060 - Voting results sent to TC, SR - Formal Approval
• Start Date: 18-Oct-2024
• Completion Date: 18-Oct-2024
• Ref Project: kSIST FprEN IEC 62127-2:2024 - Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields

Relations

• Revises: EN 62127-2:2007 - Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields up to 40 MHz
• Effective Date: 27-Sep-2022
• Revises: EN 62127-2:2007/A2:2017 - Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields up to 40 MHz
• Effective Date: 27-Sep-2022
• Revises: EN 62127-2:2007/A1:2013 - Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields up to 40 MHz
• Effective Date: 27-Sep-2022

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN IEC 62127-2:2024
01-februar-2024
Ultrazvok - Hidrofoni - 2. del: Kalibracija za ultrazvočna polja
Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields
Ultrasons - Hydrophones - Partie 2: Etalonnage des champs ultrasoniques
Ta slovenski standard je istoveten z: prEN IEC 62127-2:2023
ICS:
11.040.01 Medicinska oprema na Medical equipment in general
splošno
17.140.50 Elektroakustika Electroacoustics
oSIST prEN IEC 62127-2:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 62127-2:2024
oSIST prEN IEC 62127-2:2024
87/840/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62127-2 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-11-24 2024-02-16
SUPERSEDES DOCUMENTS:
87/826/CD, 87/831A/CC
IEC TC 87 : ULTRASONICS
SECRETARIAT: SECRETARY:
United Kingdom Mr Petar Luzajic
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if any, in
this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they
are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In So me Countries” clauses
to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC
clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Ultrasonics – Hydrophones – Part 2: Calibration for ultrasonic fields

PROPOSED STABILITY DATE: 2027
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions. You
may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without permis sion
in writing from IEC.
oSIST prEN IEC 62127-2:2024
87/840/CDV – 2 – IEC CDV 62127-2 © IEC 2023
NOTE FROM TC/SC OFFICERS:
oSIST prEN IEC 62127-2:2024
IEC CDV 62127-2 © IEC 2023 – 3 – 87/840/CDV
1 CONTENTS
2 CONTENTS . 1
3 FOREWORD . 9
4 INTRODUCTION . 11
5 1 Scope . 12
6 2 Normative references . 12
7 3 Terms, definitions and symbols . 13
8 4 List of symbols . 21
9 5 Overview of calibration procedures . 23
10 5.1 Principles . 23
11 5.2 Summary of calibration procedures . 24
12 5.3 Reporting of results . 26
13 5.4 Recommended calibration periods . 28
14 6 Generic requirements of a hydrophone calibration system . 28
15 6.1 Mechanical positioning . 28
16 General . 28
17 Accuracy of the axial hydrophone position . 28
18 Accuracy of the lateral hydrophone position . 28
19 6.2 Temperature measurements and temperature stability . 29
20 6.3 Hydrophone size . 29
21 6.4 Measurement vessel and water properties . 29
22 6.5 Measurement of output voltage . 30
23 7 Electrical considerations . 30
24 7.1 Signal type . 30
25 7.2 Earthing . 30
26 7.3 Measurement of hydrophone output voltage . 31
27 General . 31
28 Electrical loading by measuring instrument . 31
29 Electrical loading by extension cables . 31
30 Noise . 31
31 Cross-talk (radio-frequency rf pick-up) and acoustic interference . 32
32 Integral hydrophone pre-amplifiers . 32
33 8 Preparation of hydrophones. 32
34 8.1 General . 32
35 8.2 Wetting . 32
36 8.3 Hydrophone support . 32
37 8.4 Influence of cable . 33
38 9 Free field reciprocity calibration . 33
39 9.1 General . 33
40 9.2 Object . 33
41 9.3 General principles . 33
42 General . 33
43 Three-transducer reciprocity calibration method . 33
44 Self-reciprocity calibration method . 33
45 Two-transducer reciprocity calibration method . 34
46 9.4 Two-transducer reciprocity calibration method . 34

oSIST prEN IEC 62127-2:2024
87/840/CDV – 4 – IEC CDV 62127-2 © IEC 2023
47 Auxiliary transducers . 34
48 Reflector . 34
49 Measurement field . 35
50 Reciprocity approach . 35
51 Measurement procedure . 35
52 10 Free field calibration by planar scanning. 35
53 10.1 General . 35
54 10.2 Object . 35
55 10.3 General principle . 35
56 10.4 Procedural requirements . 37
57 Hydrophone scanning . 37
58 10.5 Procedure . 37
59 Power measurement . 37
60 Transducer mounting . 37
61 Measurement conditions . 38
62 Measurements . 38
63 10.6 Corrections and sources of uncertainty . 38
64 11 Free field calibration by optical interferometry . 38
65 11.1 General . 38
66 11.2 Principle . 38
67 12 Calibration by comparison using a standard hydrophone . 39
68 12.1 General . 39
69 12.2 Object . 39
70 12.3 Principle . 39
71 12.4 Procedural requirements . 39
72 Source transducer . 39
73 Source transducer drive signal . 40
74 Measurement system . 40
75 12.5 Procedure . 40
76 Measurements (Type I): determination of the directional response of
77 a hydrophone . 40
78 Measurements (Type II): calibration by comparison using a standard
79 hydrophone . 41
80 12.6 Maximum hydrophone size . 41
81 Annex A (informative) Assessment of uncertainty in free field calibration of
82 hydrophones . 42
83 A.1 General . 42
84 A.2 Overall (expanded) uncertainty . 42
85 A.3 Common sources of uncertainty . 42
86 Annex B (informative) Behaviour of PVDF polymer sensors in high intensity ultrasonic
87 fields . 44
88 B.1 General . 44
89 B.2 Theoretical background . 44
90 B.3 Tests . 44
91 B.4 Results . 45
92 B.5 Conclusions . 46
93 Annex C (informative) Electrical loading corrections . 47

oSIST prEN IEC 62127-2:2024
IEC CDV 62127-2 © IEC 2023 – 5 – 87/840/CDV
94 C.1 General . 47
95 C.2 Corrections using complex impedance . 47
96 C.3 Corrections using only capacitances . 47
97 Annex D (informative)  Absolute calibration of hydrophones using the planar scanning
98 technique .
...