1、BSI Standards PublicationBS EN ISO 15548-1:2013Non-destructive testing Equipment for eddy currentexaminationPart 1: Instrument characteristics andverification (ISO 15548-1:2013)BS EN ISO 15548-1:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO15548-1:201
2、3. It supersedes BS EN ISO 15548-1:2008 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/46, Non-destructive testing.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to
3、include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 80905 7ICS 19.100Compliance with a British Standard cannot confer immunity fromlegal obligations.This Brit
4、ish Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2013.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 15548-1 December 2013 ICS 19.100 Supersedes EN ISO 15548-1:2008English Versio
5、n Non-destructive testing - Equipment for eddy current examination - Part 1: Instrument characteristics and verification (ISO 15548-1:2013) Essais non destructifs - Appareillage pour examen par courants de Foucault - Partie 1: Caractristiques de lappareil et vrifications (ISO 15548-1:2013) Zerstrung
6、sfreie Prfung - Technische Ausrstung fr die Wirbelstromprfung - Teil 1: Kenngren von Prfgerten und deren Verifizierung (ISO 15548-1:2013) This European Standard was approved by CEN on 11 November 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the cond
7、itions 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 CEN member. This European Standard exist
8、s in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national stan
9、dards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Sl
10、ovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserv
11、ed worldwide for CEN national Members. Ref. No. EN ISO 15548-1:2013 EBS EN ISO 15548-1:2013EN ISO 15548-1:2013 (E) 3 Foreword This document (EN ISO 15548-1:2013) has been prepared by Technical Committee ISO/TC 135 “Non-destructive testing” in collaboration with Technical Committee CEN/TC 138 “Non-de
12、structive 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 June 2014, and conflicting national standards shall be withdrawn at the latest by June
13、 2014. 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 ISO 15548-1:2008. According to the CEN-CENELEC Inte
14、rnal 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, I
15、reland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 15548-1:2013 has been approved by CEN as EN ISO 15548-1:2013 without any modification
16、. BS EN ISO 15548-1:2013ISO 15548-1:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Eddy current instrument characteristics 14.1 General characteristics . 14.2 Electrical characteristics 25 Verification . 75.1 General .
17、75.2 Levels of verification 75.3 Verification procedure 85.4 Corrective actions . 86 Measurement of electrical characteristics of instrument . 86.1 Measuring requirements 86.2 Generator unit . 96.3 Input stage characteristics . 126.4 Signal processing 146.5 Output 236.6 Digitisation 23Annex A (infor
18、mative) Principle of frequency beat method .24Annex B (informative) Method of measurement of linearity range between output and input 26Annex C (normative) Alternative measurement of the input impedance .27BS EN ISO 15548-1:2013ISO 15548-1:2013(E)ForewordISO (the International Organization for Stand
19、ardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right
20、to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures us
21、ed to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules
22、of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified duri
23、ng the development of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patentsAny trade name used in this document is information given for the convenience of users and does not constitute an endorsement.The committee responsible for this d
24、ocument is ISO/TC 135, Non-destructive Testing, Subcommittee SC 4, Eddy current methods.This second edition cancels and replaces the first edition (ISO 15548-1:2008), of which it constitutes a minor revision. It also incorporates the Correction ISO 15548-1:2008/Cor 1:2010.ISO 15548 consists of the f
25、ollowing parts, under the general title Non-destructive testing Equipment for eddy current examination: Part 1: Instrument characteristics and verification Part 2: Probe characteristics and verification Part 3: System characteristics and verificationiv ISO 2013 All rights reservedBS EN ISO 15548-1:2
26、013INTERNATIONAL STANDARD ISO 15548-1:2013(E)Non-destructive testing Equipment for eddy current examination Part 1: Instrument characteristics and verification1 ScopeThis part of ISO 15548 identifies the functional characteristics of a general-purpose eddy current instrument and provides methods for
27、 their measurement and verification.The evaluation of these characteristics permits a well-defined description and comparability of eddy current equipment.By careful choice of the characteristics, a consistent and effective eddy current examination system can be designed for a specific application.W
28、here accessories are used, these are characterised using the principles of this part of ISO 15548.This part of ISO 15548 gives neither the extent of verification nor acceptance criteria for the characteristics. They are given in the application documents.2 Normative referencesThe following documents
29、, 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.ISO 12718, Non-destructive test
30、ing Eddy current testing VocabularyISO 15549, Non-destructive testing Eddy current testing General principles3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 12718 apply.4 Eddy current instrument characteristics4.1 General characteristics4.1.1 Type of
31、instrumenta) An instrument has a general-purpose application when the relationship between the measured quantity and the display or output is established by the user. A range of probes can be connected to the instrument. The instrument manufacturer shall provide details of the internal electrical ch
32、aracteristics, in order that the user can design the examination system. The examination system shall be in accordance with ISO 15549. The user shall be able to vary the value of frequency, gain, balance (unless an automatic balance is used), phase, filters and gain and zero of the display. ISO 2013
33、 All rights reserved 1BS EN ISO 15548-1:2013ISO 15548-1:2013(E)b) An instrument is of specific application when the relationship between the measured quantity and the display or output is explicitly defined in the range of application. The probe is specific to the instrument. For this type of instru
34、ment, this part of ISO 15548 may be partially applied.4.1.2 Power supplyThe instrument can be powered by batteries or by the local AC power supply. The nominal values of voltage, frequency and power consumption shall be stated, together with the tolerance for correct operation.4.1.3 SafetyThe instru
35、ment and its accessories shall meet the applicable safety regulations, for example, electrical hazard, surface temperature, explosion, etc.4.1.4 TechnologyThe instrument can be wholly analogue or partly analogue and partly digital.The excitation can be single frequency, multifrequency, swept frequen
36、cy or pulsed.The instrument can be single or multichannel.The instrument settings can be manual, remote controlled, stored or preset.The instrument shall have component outputs and can be with or without a self-contained display.4.1.5 Physical presentationThe instrument can be portable, cased or rac
37、k mounted, with the component parts integrated or modular.The weight and size shall be specified for the instrument and its accessories.The plugs and sockets shall be specified regarding type and pin interconnections.The instrument model number and the serial number shall be clearly readable and loc
38、ated in a readily accessible place.4.1.6 Environmental effectsThe warm-up time necessary for the instrument to reach stable operating conditions within specified limits shall be stated.The temperature, humidity and vibration ranges for normal use, storage and transport shall be specified for the ins
39、trument and its accessories.The instrument shall conform to relevant electromagnetic compatibility (EMC) regulations.4.2 Electrical characteristics4.2.1 GeneralThe electrical characteristics of an instrument shall be evaluated after the warm-up time has elapsed.The electrical characteristics are onl
40、y valid for the stated operating conditions.When relevant, the stability of the specified values with time, for specified environmental conditions, shall be stated.2 ISO 2013 All rights reservedBS EN ISO 15548-1:2013ISO 15548-1:2013(E)The electrical characteristics apply to various items of the func
41、tional block diagram of the instrument. Where applicable, they are provided by the manufacturer. Some of these characteristics can be verified according to the methodology described in Clause 6.4.2.2 Functional block diagramThe functional block diagram of a typical general-purpose eddy current instr
42、ument is shown in Figure 1.Figure 1 Functional block diagram of eddy current instrument4.2.3 Generator unitThe source of excitation is the generator unit.In the case of alternating excitation (sinusoidal, triangular, rectangular, etc.), the characteristics to be defined are as follows: type of gener
43、ator: current or voltage; type of excitation: single or multifrequency; frequency setting: range, step size, deviation from nominal value; harmonic distortion; amplitude setting: range, step size, deviation from nominal value, maximum output voltage or current; source impedance with frequency depend
44、ence.In the case of multifrequency excitation, it shall be stated whether frequencies are injected simultaneously or multiplexed, independent or related, and the multiplexing sequence shall be specified, when relevant.4.2.4 Input stage characteristicsThe input stage interfaces the probe to the instr
45、ument. It provides impedance matching and amplification, as required. ISO 2013 All rights reserved 3BS EN ISO 15548-1:2013ISO 15548-1:2013(E)The characteristics to be defined are as follows: input impedance with frequency dependence; gain setting range, step size, deviation from nominal value; maxim
46、um input voltage; common-mode operating parameters, when relevant.4.2.5 BalanceBalance is the compensation of the signal to achieve a predetermined operating point, e.g. zero. The compensation may be performed manually or automatically, at the input stage, or during HF signal processing, or during d
47、emodulated signal processing, or on the display.The characteristics to be defined are as follows: maximum input range, which can be compensated; residual value at balance (expressed as a percentage of a specified range, e.g. full-scale output).4.2.6 High-frequency signal processing4.2.6.1 HF filteri
48、ngFilters reduce the signal frequency content which can have an undesirable effect on the test result.The filters used before demodulation are referred to as carrier frequency filters (HF filters). These are usually band-pass filters which suppress any signal frequencies which do not correspond to t
49、he excitation frequency.The characteristics to be defined are as follows: gain; bandwidth at 3 dB attenuation; rate of attenuation; transient response.4.2.6.2 HF amplificationThe characteristics to be defined are as follows: gain setting range, step size, deviation from nominal value; input signal range; bandwidth; output saturation level.4.2.6.3 DemodulationSynchronous demodulation extracts the vector components from the HF signal.For positive polarity of demodulation, a delay in the signal will cause the signal ve
