BS EN 13477-2:2010
BSl Standards Publication
Non-destructive testing - Acoustic emission Equipment characterisation Part 2: Verification of operating characteristic
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BSi
raising standards worldwide" BSEN13477-2:2010
BRITISH STANDARD
National foreword This British Standard is the UK implementation of EN 13477-2:2010. It supersedes BS EN 13477-2:2001 which is withdrawn. The UK participation in its preparation was entrusted to Technical CommitteeWEE/46,Non-destructive testing A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. 'BSI 2010 ISBN9780580610103 ICS 17.140.01; 19.100 Compliancewith a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on31October2010. Amendments issued since publication Date
Text affecteo BSEN13477-2:2010
EN 13477-2
EUROPEANSTANDARD NORMEEUROPEENNE EUROPAISCHE NORM
September2010
ICS 19.100
Supersedes EN 13477-2:2001
English Version
Non-destructivetesting-Acousticemission-E Equipment characterisation-Part2:Verification of operating characteristic
Essais non destructifs, emission acoustique Caracterisation de I'equipement - Partie 2: Verifications des
Zerstorungsfreie Prufung - Schallemissionsprufung Geratecharakterisierung - Teil 2: Uberprufung der
caracteristiques de fonctionnement
BetriebskenngrolBen
This European Standard was approved by CEN on 30 July 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europe an Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning s uch national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by tra nslation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
cen
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FUR NORMUNG
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2010CEN All rights of exploitation in any form and by any means reserved
Ref. No.EN 13477-2:2010: E
worldwide for CEN national Members BSEN13477-2:2010 EN13477-2:2010 (E)
Contents
Page
Foreword. 1
.4 .5
Scope Normative references... Terms and definitions Required test equipment....
2 3 4 4.1 List of required equipment .. 4.2 Test signal waveforms .... 4.2.1 Continuous sine wave... 4.2.2 Triangularmodulated sinewave..................... 4.2.3 Sine"-modulated sine wave... 4.2.4 Rectangular modulated sine wave... 4.2.5 Pulse 4.2.6 Repetitive signals.... 4.3 TestBody 4.4 Shielding test plate ... 5
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Sensor verification..
5.1 General 5.2 Uses.... 5.3
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Procedure
5.3.1 Preliminaryexamination.. 5.3.2 Sensitivity verification.... 5.3.3 Verification of electrical shielding ... 5.3.4 Electricalnoiseverificationofasensor-preamplifiercombination
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11 11 12 12 .. 12 .13
Preamplifier verification..
6 6.1 General. ..................................... 6.2 Verification of DC-current consumption .... 6.3 Measurementofpreamplifiercharacteristics. 6.3.1 General.. 6.3.2 Gain........ 6.3.3 Bandwidth 6.3.4 Electronic noise 6.3.5 Dynamic range. 6.3.6 Pulsing test..
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AE signal processor verification....
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7 7.1 Oyeryiew...... 7.2 Bandwidth and filter roll-off verification 7.3 Detection threshold verification..... 7.4 AEsignal processor noiseverification 7.5 Burst signal parameter verification ... 7.5.1 General. 7.5.2 Peak amplitude. 7.5.3 Duration. 7.5.4 Rise time.. 7.5.5 Ring down count. 7.5.6 Energy... 7.6 Parameters for continuous signal. 8
16 17 17 ..17 .18 18 18 20 .20 .20
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External parameterverification. System acquisition rate verification ..
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10 11 AnnexA(informative)Sensorperformancecheckform.. AnnexB (informative)Preamplifierperformancecheckform.. Annex C(informative)AE signalprocessor-bandwidth&noiseverification form (one per
Atmeasurementverification Documentation
channel..........
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3 BS EN 13477-2:2010 EN13477-2:2010 (E)
Foreword
This document (EN 13477-2:2010) has been prepared by Technical Committee CEN/TC 138“Non-destructive testing", the secretariat of which is held by AFNOR This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2011, and conflicting national standards shall be withdrawn at the latest by March 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights This document supersedes EN 13477-2:2001. EN 13477 consists of the following parts under the general title Non-destructive testing—Acoustic emission Equipmentcharacterisation:
Part 1: Equipment description;
一
—Part 2:Verification ofoperating characteristic. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic,Denmark, Estonia, Finland, France, Germany,Greece,Hungary,Iceland, Ireland,Italy,Latvia, Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Romania,Slovakia, Slovenia,Spain, Sweden, Switzerland and the United Kingdom.
4 BS EN 13477-2:2010 EN 13477-2:2010 (E)
1 Scope This part of the standard specifies methods for routine verification of the performance of AE equipment comprising one or more sensing channels. It is intended for use by operators of the equipment under laboratory conditions. Verification of the measurement characteristics is recommended after purchase of equipment,modifications, use under extraordinary conditions,or if one suspects a malfunction. The procedures described in this European Standard do not exclude other qualified methods, e.g. verification in the frequency domain.
2 Normativereferences 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. EN1330-1:1998, Non destructive testing—Terminology—Part 1: List ofgeneral terms EN1330-2:1998,Non destructive testingTerminology—Part2:Terms common tothenon-destructive testing methods EN1330-9:2009,Non-destructive testing—TerminologyPart 9:Terms used in acoustic emission testing EN13477-1:2001， Non-destructive testing Acoustic emission Equipmentcharacterisation Part 1:Equipment description IEC60050 (all parts),InternationalElectrotechnicalVocabulary
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3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1330-1:1998, EN 1330-2:1998 EN1330-9:2009and IEC 60050 (all parts)and the following apply. 3.1 AE signal processor part of an AE channel for the conversion of the output of the preamplifier to digital signal parameters NOTE The AE signal processor may include additional support functions, e.g. preamplifier power supply, test pulse control, transient recorder, and more 3.2 arbitraryfunction generator (AFG) electronic device for generating a programmable test signal (burst) 3.3 DCcalibratol electronic device for generating an adjustable or programmable Dc voltage of appropriate accuracy for stimulating an external parametric input
4 Requiredtestequipment
4.1List of required equipment The following minimum test equipment is required:
5 BSEN13477-2:2010 EN13477-2:2010 (E)
a) test body; b) shielding test plate c) Hsu-Nielsen source, for sensor sensitivity verification; d) sweep function/variable pulse generator (if function not included in f); e) multimeter, e.g. for DC voltage and DC current measurement; f) test signal generator, e.g. AE calibrator or arbitrary function generator (AFG)) g) variable attenuator, graduated in decibels, can be part of the test signal generator h) DC-calibrator,for external parameter stimulation; i) DC-power-supply, for preamplifier supply, with a proper circuit to decouple and terminate the AE signal, if
the power is fed-in over the signal wire; ji) RMS voltmeter, with known or settable time constant or time window; k) dual channel storage oscilloscope, for preamplifier verification, peak noise measurement and
identification of any artefacts on the AE signal. NOTE Items i) to k) can be substituted by a verified AE signal processor comprising peak amplitude and RMS measurement. The inaccuracy of the test signal generator shall be significantly lower than the acceptable inaccuracies given inthis standard andsummarized inTable3.Les: ccurate test signal generators can be used, if the inaccuracy of each pattern is measured and considered during verification. The reproducibility of the DC calibrator output shall be significantly lower than the acceptable inaccuracy of the external parameter verification. The inaccuracy of the DC calibrator at the used measurement levels shal be obtained and considered during verification (see Clause 8). All electric/electronic test items shall be calibrated to ensure traceability to Sl units 4.2Test signalwaveforms The following types of test signals shall be used to verify the operating characteristics of the AE measurement system 4.2.1Continuoussinewave This type of test signal shall be used to verify the frequency response and gain of the preamplifier and the continuous signal level accuracy of the AE signal processor.
4.2.2Triangularmodulated sinewave This type of wave simulates an AE burst signal, see Figure 1. It is defined by the following characteristics — A=amplitude; R = rise-time;
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D = duration; f = carrier frequency
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