1、March 2014Translation by DIN-Sprachendienst.English price group 15No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 1
2、9.100!%,E“2099534www.din.deDDIN EN ISO 15548-1Non-destructive testing Equipment for eddy current examination Part 1: Instrument characteristics and verification (ISO 15548-1:2013);English version EN ISO 15548-1:2013,English translation of DIN EN ISO 15548-1:2014-03Zerstrungsfreie Prfung Technische A
3、usrstung fr die Wirbelstromprfung Teil 1: Kenngren von Prfgerten und deren Verifizierung (ISO 15548-1:2013);Englische Fassung EN ISO 15548-1:2013,Englische bersetzung von DIN EN ISO 15548-1:2014-03Essais non destructifs Appareillage pour examen par courants de Foucault Partie 1: Caractristiques de l
4、appareil et vrifications (ISO 15548-1:2013);Version anglaise EN ISO 15548-1:2013,Traduction anglaise de DIN EN ISO 15548-1:2014-03SupersedesDIN EN ISO 15548-1:2010-06www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 33 pages03.14 DIN EN I
5、SO 15548-1:2014-03 2 A comma is used as the decimal marker. National 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-destructive testing” (Secretariat: AFNOR, France).
6、 The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-08-24 AA Elektrische und magnetische Prfverfahren. The DIN Standards corresponding to the International Standards referred to in this docu
7、ment are as follows: ISO 12718 DIN EN ISO 12718 ISO 15549 DIN EN ISO 15549 Amendments This standard differs from DIN EN ISO 15584-1:2010-06 as follows: a) the standard has been revised in form and substance. Previous editions DIN EN 13860-1: 2003-05 DIN EN ISO 15548-1: 2009-01, 2010-06 National Anne
8、x NA (informative) Bibliography DIN EN ISO 12718, Non-destructive testing Eddy current testing Vocabulary DIN EN ISO 15549, Non-destructive testing Eddy current testing General principles EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 15548-1December 2013 ICS 19.100 Supersedes EN ISO 15548
9、-1:2008English Version 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 15
10、548-1:2013) Zerstrungsfreie 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 whi
11、ch 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 CEN member. This Eu
12、ropean Standard exists 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
13、are the national standards 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,
14、Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and b
15、y any means reserved worldwide for CEN national Members. Ref. No. EN ISO 15548-1:2013 EContents Page Foreword . 3 1 Scope . 4 2 Normative references. 4 3 Terms and definitions 4 4 Eddy current instrument characteristics . 4 4.1 General characteristics . 4 4.2 Electrical characteristics . 5 5 Verific
16、ation 10 5.1 General 10 5.2 Levels of verification 10 5.3 Verification procedure . 11 5.4 Corrective actions 11 6 Measurement of electrical characteristics of instrument 11 6.1 Measuring requirements . 11 6.2 Generator unit . 12 6.3 Input stage characteristics 15 6.4 Signal processing 17 6.5 Output
17、26 6.6 Digitisation 26 Annex A (informative) Principle of frequency beat method 27 Annex B (informative) Method of measurement of linearity range between output and input 29 Annex C (normative) Alternative measurement of the input impedance . 30 2DIN EN ISO 15548-1:2014-03EN ISO 15548-1:2013 (E) For
18、eword 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-destructive testing” the secretariat of which is held by AFNOR. This European Standard shall be given the status of a nati
19、onal 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 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rig
20、hts. 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 Internal Regulations, the national standards organizations of the following countries are bound to implement this European S
21、tandard: 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, Slovenia,
22、 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. 3DIN EN ISO 15548-1:2014-03EN ISO 15548-1:2013 (E)EN ISO 15548 consists of the following parts, under the general titl
23、e 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 verification 1 ScopeThis part of ISO 15548 identifies the functional characteristics of a general-pu
24、rpose eddy current instrument and provides methods for 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 examinati
25、on system can be designed for a specific application.Where 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 d
26、ocuments.2 Normative referencesThe 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 a
27、ny amendments) applies.ISO 12718, Non-destructive testing 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 ch
28、aracteristics4.1 General characteristics4.1.1 Type of 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 manufactur
29、er shall provide details of the internal electrical characteristics, 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), pha
30、se, filters and gain and zero of the display.4DIN EN ISO 15548-1:2014-03EN ISO 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 in
31、strument. For this type of instrument, 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
32、 operation.4.1.3 SafetyThe instrument 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 frequen
33、cy, multifrequency, swept frequency 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 instrum
34、ent can be portable, cased or rack 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
35、shall be clearly readable and located 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 transpo
36、rt shall be specified for the instrument 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 e
37、lectrical characteristics are only valid for the stated operating conditions.When relevant, the stability of the specified values with time, for specified environmental conditions, shall be stated.5DIN EN ISO 15548-1:2014-03EN ISO 15548-1:2013 (E)The electrical characteristics apply to various items
38、 of the functional 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 c
39、urrent instrument 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: t
40、ype of generator: 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 freq
41、uency dependence.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
42、to the instrument. It provides impedance matching and amplification, as required.6DIN EN ISO 15548-1:2014-03EN ISO 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; maximum input
43、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 demodulate
44、d 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 filteringFilters
45、 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 the excita
46、tion 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; ban
47、dwidth; 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 vector to rotate clockwise. The polarity of demodulation shall be positive and shall be co
48、nfirmed.7DIN EN ISO 15548-1:2014-03EN ISO 15548-1:2013 (E)The characteristics to be defined are as follows: wave shape of the reference signal, e.g. sine, square, pulse; bandwidth for each wave shape of the reference signal; phase-dependent amplitude deviations; phase-dependent phase deviations.Ampl
49、itude demodulation extracts the low-frequency amplitude variations from the HF signal.4.2.7 Demodulated signal processing4.2.7.1 Vector amplificationVector amplification generally consists of two transmission channels of identical design. These channels amplify the vector components produced by synchronous demodulation. In some instruments, these components can be amplified with different gains.The characteristics to b
