1、February 2014 Translation by DIN-Sprachendienst.English price group 9No 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).IC
2、S 19.100!%,B“2093159www.din.deDDIN EN 12668-3Non-destructive testing Characterization and verification of ultrasonic examination equipment Part 3: Combined equipment;English version EN 12668-3:2013,English translation of DIN EN 12668-3:2014-02Zerstrungsfreie Prfung Charakterisierung und Verifizierun
3、g der Ultraschall-Prfausrstung Teil 3: Komplette Prfausrstung;Englische Fassung EN 12668-3:2013,Englische bersetzung von DIN EN 12668-3:2014-02Essais non destructifs Caractrisation et vrification de lappareillage de contrle par ultrasons Partie 3: quipement complet;Version anglaise EN 12668-3:2013,T
4、raduction anglaise de DIN EN 12668-3:2014-02SupersedesDIN EN 12668-3:2000-07 andDIN EN 12668-3/A1:2004-10www.beuth.deDocument comprises 12 pagesIn case of doubt, the German-language original shall be considered authoritative.01.14DIN EN 12668-3:2014-02 2 A comma is used as the decimal marker. Nation
5、al foreword This document (EN 12668-3:2013) has been prepared by Technical Committee CEN/TC 138 “Non-destructive testing” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Comm
6、ittee NA 062-08-23 AA Ultraschallprfung. Amendments This standard differs from DIN EN 12668-3:2000-07 and DIN EN 12668-3/A1:2004-10 as follows: a) normative references have been updated; b) EN 12668-3/A1:2004 has been incorporated; c) the standard has been editorially revised. Previous editions DIN
7、54124-1: 1983-05 DIN EN 12668-3: 2000-07 DIN EN 12668-3/A1: 2004-10 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12668-3 November 2013 ICS 19.100 Supersedes EN 12668-3:2000English Version Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 3
8、: Combined equipmentEssais non destructifs - Caractrisation et vrification de lappareillage de contrle par ultrasons - Partie 3: quipement complet Zerstrungsfreie Prfung - Charakterisierung und Verifizierung der Ultraschall-Prfausrstung - Teil 3: Komplette Prfausrstung This European Standard was app
9、roved by CEN on 29 September 2013. CEN 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 nati
10、onal standards may be obtained on application to the CEN-CENELEC 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 translation under the responsibility of a CEN member into its own langu
11、age and notified to the CEN-CENELEC 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
12、 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN
13、-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12668-3:2013: EEN 12668-3:2013 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Description of te
14、sts and reporting .4 3.1 General 4 3.2 Ultrasonic instrument checks 5 3.2.1 Linearity of the timebase 5 3.2.2 Linearity of equipment gain 6 3.3 Probe checks 7 3.3.1 Probe index point.7 3.3.2 Beam angle .7 3.3.3 Index point and beam angle simultaneously 8 3.4 System checks: Probe, cable and ultrasoni
15、c instrument combined 8 3.4.1 Measurement of base values 8 3.4.2 Physical state and external aspects 9 3.4.3 Sensitivity and signal-to-noise ratio 9 3.4.4 Pulse duration . 10 DIN EN 12668-3:2014-02 EN 12668-3:2013 (E) 3 Foreword This document (EN 12668-3:2013) has been prepared by Technical Committe
16、e 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 May 2014, and conflicting national standards shall be withdrawn a
17、t the latest by May 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 12668-3:2000. This European Stan
18、dard is composed of the following parts: EN 12668-1, Non-destructive testing Characterization and verification of ultrasonic examination equipment Part 1: Instruments; EN 12668-2, Non-destructive testing Characterization and verification of ultrasonic examination equipment Part 2: Probes; EN 12668-3
19、, Non-destructive testing Characterization and verification of ultrasonic examination equipment Part 3: Combined equipment (this document). According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard
20、: 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, Spain,
21、 Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 12668-3:2014-02 EN 12668-3:2013 (E) 4 1 Scope This European Standard describes methods and acceptance criteria for verifying the performance of ultrasonic equipment (i.e. instrument and probe combined as defined in EN 12668-1 and EN 12668-2
22、) by the use of appropriate standard calibration blocks. These methods are not intended to prove the suitability of the equipment for particular applications. The methods described are suitable for the use by operators working under site or shop floor conditions. The methods only apply to pulse echo
23、 equipment using A-scan presentation, with gain controls or attenuators calibrated in steps not greater than 2 dB and used essentially in contact testing. These methods are specifically intended for manual testing equipment. For automated testing different tests can be needed to ensure satisfactory
24、performance. 2 Normative references The 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 (includ
25、ing any amendments) applies. EN 12668-1, Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 1: Instruments EN 12668-2, Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 2: Probes EN ISO 2400, Non
26、-destructive testing - Ultrasonic testing - Specification for calibration block No. 1 (ISO 2400) EN ISO 7963, Non-destructive testing - Ultrasonic testing - Specification for calibration block No. 2 (ISO 7963) 3 Description of tests and reporting 3.1 General The methods described in this European St
27、andard, together with the frequency of checking, are summarized in Table 1. Compliance with the checks shall be recorded on the ultrasonic test report. DIN EN 12668-3:2014-02 EN 12668-3:2013 (E) 5 Table 1 Tests for combined equipment Subclause Title Frequency of checking 3.2.1 Linearity of timebase
28、Weekly a3.2.2 Linearity of equipment gain Weekly a3.3.1 Probe index Daily 3.3.2 Beam angle Daily 3.4.2 Physical state and external aspects Daily 3.4.3 Sensitivity and signal-to-noise ratio Weekly a3.4.4 Pulse duration Weekly aaTo simplify the recording of weekly checks it may be more convenient for
29、the user to perform them each time the equipment is used. 3.2 Ultrasonic instrument checks 3.2.1 Linearity of the timebase 3.2.1.1 General This check is carried out using a standard calibration block defined in EN ISO 2400 or EN ISO 7963, and a normal-beam compression wave probe or shear wave angle-
30、beam probe. The linearity shall be checked over a range at least equal to that which is to be used in subsequent testing. Where appropriate, due allowance can be made for the fact that a range of 91 mm for compressional waves in steel is equivalent to a range of only 50 mm for shear waves. 3.2.1.2 P
31、rocedure Place the probe on the calibration block in a position where the range to the last backwall or radius echo is equal to or exceeds the range over which the linearity shall be checked. Adjust the timebase so that the first and the sixth backwall echoes coincide with the first and last scale m
32、arks respectively. Check the linearity with the four other echoes. Bring the backwall echoes, in turn, to approximately the same height e.g. 80 % full screen height. The leading edge of each echo should line up with the appropriate graticule line. Check that any deviations from the ideal positions a
33、re within the specified tolerance when measured at the same screen height when the first and the sixth echo were positioned. 3.2.1.3 Tolerance The deviation from linearity shall not exceed 2 % of full screen width. 3.2.1.4 Frequency of checking The check shall be carried out at least once per week f
34、or ultrasonic instruments to be used during that week. DIN EN 12668-3:2014-02 EN 12668-3:2013 (E) 6 3.2.2 Linearity of equipment gain 3.2.2.1 General This check monitors the combined result of two characteristics that affect the linearity of the equipment gain, i.e. the linearity of amplifier and th
35、e accuracy of the calibrated gain control. Any standard calibration block can be used for this test, preferably in conjunction with the probe that will be used in subsequent testing. The linearity shall be checked with the ultrasonic instrument controls (frequency, range, pulse energy, etc.) switche
36、d to positions to be employed in subsequent testing. Variable suppression and swept gain controls shall be switched to “off”. 3.2.2.2 Procedure Position the probe on a calibration block to obtain a reflected signal from a small reflector e.g. the 5 mm hole in the EN ISO 7963 block. Adjust the gain t
37、o set this signal to 80 % of full screen height and note the value of the calibrated gain control (dB). Then increase the gain by 2 dB and confirm that the signal rises to more than full screen height (101 %). Restore the gain to its original value and then reduce it by a further 6 dB. Confirm that
38、the signal amplitude falls to approximately 40 % screen height. Successively reduce the signal by three further increments of 6 dB and confirm that the signal amplitude falls respectively to 20 %, 10 % and 5 % screen height. 3.2.2.3 Tolerance To be acceptable, signal amplitude shall be within the li
39、mits given in the following Table 2. Table 2 Acceptance limits for gain linearity Gain dB Expected screen height (%) Limits +2 101 not less than 95 % 0 80 (reference line) 6 40 37 % to 43 % 12 20 17 % to 23 % 18 10 8 % to 12 % 24 5 visible, below 8 % 3.2.2.4 Logarithmic amplifiers If the ultrasonic
40、instrument is using a logarithmic amplifier, subclauses 3.2.2.1 to 3.2.2.3 shall be replaced by an overall input/output amplitude accuracy test of the instrument according to manufacturers specification. The test shall verify that errors do not exceed 1 dB in any 20 dB span and 2 dB in any 60 dB spa
41、n. 3.2.2.5 Frequency of checking The check shall be carried at least once per week for ultrasonic instruments to be used during that week. DIN EN 12668-3:2014-02 EN 12668-3:2013 (E) 7 3.3 Probe checks 3.3.1 Probe index point 3.3.1.1 General This check applies only to angle beam probes. The probe ind
42、ex point can be checked on the standard EN ISO 2400 or EN ISO 7963 calibration block each of which has a cylindrical reflector (quadrant). The probe index point shall be checked prior to checking the beam angle. 3.3.1.2 Procedure Position the probe on the appropriate side of the block to obtain a re
43、flection from the quadrant. Move the probe backwards and forwards to maximize the amplitude of the reflected signal, taking care to move the probe parallel to the block sides. When the amplitude is at maximum, the true probe index point will correspond to the engraved line on the block which marks t
44、he geometrical centre of the quadrant. The probe index point measurement should be repeatable to within 1 mm. If the measured position differs from the existing mark by more than 1 mm the new position shall be marked on the probe sides, and recorded, and shall be used in subsequent probe checks and
45、defect plotting. 3.3.1.3 Tolerance Tolerance will depend on application, but for plotting of defects it is recommended that the probe index point position is known to within 1 mm. 3.3.1.4 Frequency of checking This will depend on the rate of probe wear due to usage and to the roughness of the scanni
46、ng surface. When a probe is in continuous use, the check shall be carried out at least every few hours; otherwise, a daily check shall be performed for probes to be used during that day. 3.3.2 Beam angle 3.3.2.1 General The reference blocks defined in EN ISO 2400 or EN ISO 7963 provide a means of ra
47、pidly checking the beam angle. If a higher accuracy is needed, the angle shall be determined using one of the methods described in EN 12668-2. 3.3.2.2 Procedure Place the probe on the calibration block and establish a signal from the selected hole. Move the probe backwards and forwards to maximize t
48、he signal from the hole. When the signal is at its maximum amplitude, the beam angle can be read from the engraved scale on the calibration block at a point directly below the measured probe index point. The deviation between measured and nominal angle shall be recorded. 3.3.2.3 Tolerance Using the
49、method previously described it is possible to measure the beam angle to an accuracy of approximately 1,5. Unless the probe history is known, previously marked probe angles should not be regarded as accurate, especially on 70 or higher angle beam probes, or on worn probes. It is recommended DIN EN 12668-3:2014-02 EN 12668-3:2013 (E) 8 that the newly measured angle be marked on the probe and recorded for future reference during the subsequent probe checks and/or defect plotting applications. Tolerances will dep
