1、May 2010 Translation by DIN-Sprachendienst.English price group 19No 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 19
2、.100!$bW“1635225www.din.deDDIN EN 12668-1Non-destructive testing Characterization and verification of ultrasonic examination equipment Part 1: InstrumentsEnglish translation of DIN EN 12668-1:2010-05Zerstrungsfreie Prfung Charakterisierung und Verifizierung der Ultraschall-Prfausrstung Teil 1: Prfge
3、rteEnglische bersetzung von DIN EN 12668-1:2010-05Essais non destructifs Caractrisation et vrification de lappareillage de contrle par ultrasons Partie 1: AppareilsTraduction anglaise de DIN EN 12668-1:2010-05SupersedesDIN EN 12668-1:2000-07 andDIN EN 12668-1/A1:2004-10www.beuth.deDocument comprises
4、 pagesIn case of doubt, the German-language original shall be considered authoritative.4705.10 DIN EN 12668-1:2010-05 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 138 “Non-destructive testing” (Secretariat: AFNOR, France). The
5、 responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-08-23 AA Ultraschallprfung. Amendments This standard differs from DIN EN 12668-1:2000-07 and DIN EN 12668-1/A1:2004-10 as follows: a) General
6、requirements have been revised and rendered more precise. b) The figures have been updated. c) The text of the standard has been editorially revised. Previous editions DIN EN 12668-1: 2000-07 DIN EN 12668-1/A1: 2004-10 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12668-1 February 2010 ICS
7、19.100 Supersedes EN 12668-1:2000English Version Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 1: Instruments Essais non destructifs - Caractrisation et vrification de lappareillage de contrle par ultrasons - Partie 1 : Appareils Zerstrungsfre
8、ie Prfung - Charakterisierung und Verifizierung der Ultraschall-Prfausrstung - Teil 1: Prfgerte This European Standard was approved by CEN on 25 December 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard t
9、he 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 Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, Ger
10、man). 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cypru
11、s, 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. EUROPEAN COMMITTEE FOR STANDARDIZATION COM
12、IT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12668-1:2010: EEN 12668-1:2010 (E) 2 Contents Page Foreword 31 Sco
13、pe 42 Normative references 43 Terms and definitions .44 Symbols 75 General requirements for compliance .86 Manufacturers technical specification for ultrasonic instruments96.1 General 96.2 General attributes 96.3 Display 96.4 Transmitter 106.5 Receiver and attenuator . 106.6 Monitor output . 116.7 A
14、dditional information . 117 Performance requirements for ultrasonic instruments 118 Group 1 tests . 138.1 Equipment required for group 1 tests 138.2 Stability against temperature 148.3 Stability against voltage variation . 168.4 Transmitter pulse parameters . 168.5 Receiver . 188.6 Monitor gate 218.
15、7 Monitor gates with proportional output 228.8 Digital ultrasonic instruments . 269 Group 2 tests . 279.1 Equipment required for group 2 tests 279.2 Physical state and external aspects . 289.3 Stability 289.4 Transmitter pulse parameters . 299.5 Receiver . 309.6 Linearity of time-base . 32Annex A (n
16、ormative) Special conditions for ultrasonic instruments with logarithmic amplifiers . 44A.1 Introduction . 44A.2 Basic requirements. 44A.2.1 Measuring accuracy . 44A.2.2 Vertical display “linearity“ . 44A.3 Tests . 44Bibliography . 45DIN EN 12668-1:2010-05 EN 12668-1:2010 (E) 3 Foreword This documen
17、t (EN 12668-1:2010) 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 August
18、 2010, and conflicting national standards shall be withdrawn at the latest by August 2010. 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 rig
19、hts. This document supersedes EN 12668-1:2000. EN 12668, Non-destructive testing Characterization and verification of ultrasonic examination equipment, consists of the following parts: Part 1: Instruments Part 2: Probes Part 3: Combined equipment According to the CEN/CENELEC Internal Regulations, th
20、e 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, Nether
21、lands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 12668-1:2010-05 EN 12668-1:2010 (E) 4 1 Scope This European Standard specifies methods and acceptance criteria for assessing the electrical performance of analogue and digital ultr
22、asonic instruments for pulse operation using A-scan display, employed for manual ultrasonic non-destructive examination with single or dual-element probes operating within the centre frequency range 0,5 MHz to 15 MHz. Ultrasonic instruments for continuous waves are not included in this standard. Thi
23、s standard may partly be applicable to ultrasonic instruments in automated systems but then other tests can be needed to ensure satisfactory performance. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the e
24、dition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1330-4:2010, Non-destructive testing Terminology Part 4: Terms used in ultrasonic testing EN 12668-3, Non-destructive testing Characterization and verification of ultras
25、onic examination equipment Part 3: Combined equipment 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1330-4:2010 and the following apply. 3.1 amplifier frequency response variation of the gain of an amplifier versus frequency NOTE It is usually speci
26、fied by a plot of gain (normalized to the peak gain value) versus frequency. 3.2 amplifier bandwidth width of the frequency spectrum between the high and low cut-off frequencies NOTE This standard uses as limits the points at which the gain is 3 dB below the peak value. 3.3 cross-talk during transmi
27、ssion amount of energy transfer from the transmitter output to the receiver input during the transmission pulse, with the ultrasonic instrument set for dual-element probe (separate transmitter and receiver) 3.4 calibrated dB-switch device controlling the overall gain of the ultrasonic instrument cal
28、ibrated in decibels 3.5 dead time after transmitter pulse time interval following the start of the transmitter pulse during which the amplifier is unable to respond to incoming signals, when using the pulse echo method, because of saturation by the transmitter pulse 3.6 digitisation sampling error e
29、rror introduced into the displayed amplitude of an input signal by the periodic nature of measurements taken by an analogue-to-digital converter DIN EN 12668-1:2010-05 EN 12668-1:2010 (E) 5 3.7 dynamic range ratio of the amplitude of the largest signal to the smallest signal which an ultrasonic inst
30、rument can display 3.8 equivalent input noise measure of the electronic noise level observed on the ultrasonic instrument screen, and defined by the input signal level, measured at the receiver input terminals, that would give the same level on the screen if the amplifier itself were noiseless 3.9 e
31、xternal attenuator standard attenuator calibrated to a traceable source used to test the ultrasonic instrument 3.10 fall time of proportional output time it takes the proportional gate output to fall from 90 % to 10 % of its peak value 3.11 frequency response of proportional gate output measure of h
32、ow the amplitude of the proportional gate output varies with input signal frequency 3.12 hold time of switched outputs time for which the switched output from a monitor gate will remain above 50 % of its maximum output following a signal in the monitor gate which is above the threshold 3.13 hold tim
33、e of proportional output time for which the proportional output is above 90 % of its peak output following a signal in the monitor gate 3.14 linearity of proportional output measure of how close the voltage output from the proportional gate is to being directly proportional to the input signal ampli
34、tude 3.15 linearity of time base measure of how close the horizontal graticule reading on the ultrasonic instrument screen is to being directly proportional to the time-of-flight of an echo 3.16 linearity of vertical display measure of how close the vertical graticule reading of a signal on the ultr
35、asonic instrument screen is to being directly proportional to the input signal amplitude 3.17 mid gain position ultrasonic instrument gain setting which is half way between the maximum and minimum gains, measured in decibels EXAMPLE For an ultrasonic instrument with a maximum gain of 100 dB and a mi
36、nimum gain of 0 dB, the mid gain position would be 50 dB. 3.18 monitor gate section of the time-base on the A-scan display in which the amplitude is compared to a threshold and/or converted to an analogue output DIN EN 12668-1:2010-05 EN 12668-1:2010 (E) 6 3.19 monitor threshold minimum signal ampli
37、tude that will operate the monitor gate output 3.20 noise of proportional output measure of the noise on the proportional output 3.21 proportional output output from the ultrasonic instrument which gives a d.c. voltage nominally proportional to the amplitude of the largest received signal within a m
38、onitor gate 3.22 pulse duration time interval during which the modulus of the amplitude of a pulse is 10 % or more of its peak amplitude 3.23 pulse repetition frequency frequency at which the transmission pulse is triggered 3.24 pulse rise time time taken for the amplitude of the leading edge of a p
39、ulse to rise from 10 % to 90 % of its peak value 3.25 pulse reverberation secondary maximum in the transmitter pulse waveform after the intended output 3.26 receiver input impedance characterisation of the internal impedance of the receiver as a parallel resistance and capacitance 3.27 response time
40、 of digital ultrasonic instruments time over which a signal has to be detected by a digital ultrasonic instrument before it is displayed at 90 % of its peak amplitude 3.28 rise time of proportional output time interval that it takes the proportional gate output to rise from 10 % to 90 % of its peak
41、value 3.29 temporal resolution minimum time interval over which two pulses are resolved by a drop in amplitude of 6 dB 3.30 time-dependent gain TDG time-dependent or swept-gain function fitted to some ultrasonic instruments to correct for the distance-related reduction in reflected amplitude 3.31 sh
42、ort pulse unrectified pulse which has fewer than 1,5 cycles in the time interval over which the pulse amplitude exceeds half its maximum peak amplitude DIN EN 12668-1:2010-05 EN 12668-1:2010 (E) 7 3.32 suppression preferential rejection of signals near the baseline of the screen, deliberately introd
43、uced to remove grass and noise or to steepen the trailing edges of larger echoes 3.33 switching hysteresis difference in amplitude between the signal which turns on and turns off a monitor gate 4 Symbols Table 1 Symbols Symbol Unit Meaning Ao, AndB Attenuator settings used during tests CmaxpF Parall
44、el capacity of receiver at maximum gain CminpF Parallel capacity of receiver at minimum gain DSdB Cross-talk damping during transmission fgHz Frequency bandwidth measured at proportional gate output fgoHz Centre frequency measured at proportional gate output fguHz Upper frequency limit at - 3 dB, me
45、asured at proportional gate output fglHz Lower frequency limit at - 3 dB, measured at proportional gate output fgmaxHz Frequency with the maximum amplitude in the frequency spectrum measured at proportional gate output foHz Centre frequency fuHz Upper frequency limit at - 3 dB flHz Lower frequency l
46、imit at - 3 dB fmaxHz Frequency with the maximum amplitude in the frequency spectrum f Hz Frequency bandwidth ImaxA Amplitude of the maximum current that can be driven by the proportional gate output N Number of measurements taken ninHzV/ Noise per root bandwidth for receiver input Rl Termination re
47、sistor Rmax Input resistance of receiver at maximum gain Rmin Input resistance of receiver at minimum gain S dB Attenuator setting T s Time incrementDIN EN 12668-1:2010-05 EN 12668-1:2010 (E) 8 Table 1 (continued) Symbol Unit Meaning tds Pulse duration Tfinals Time to the end of distance amplitude c
48、urve Tos Time to the start of distance amplitude curve trs Transmitter pulse rise time from an amplitude of 10 % to 90 % of peak amplitude tA1, tA2s Temporal resolution VEV Input voltage at the receiver VeinV Receiver input equivalent noise VinV Input voltage VlV Proportional gate output voltage wit
49、h load resistor VmaxV Maximum input voltage of the receiver VminV Minimum input voltage of the receiver VoV Proportional gate output voltage with no load resistor VrV Voltage amplitude of the ringing after the transmitter pulse V50V Voltage amplitude of the transmitter pulse with a 50 loading of the transmitter V75V Voltage amplitude of the transmitter pulse with a 75 loading of
