I E C 61 60 -2 ® Edition 201 6-03 I N TE RN ATI ON AL S TAN D ARD N ORM E I N TE RN ATI ON ALE E l ectroacou s ti cs – Octave-ban d an d fracti on al -octave-ban d fi l ters – P art : Pattern -eval u ati on tes ts É l ectroacou s ti q u e – F i l tres d e ban d e d ' octave et d e ban d e d ' u n e fracti on d ' octave – IEC 61 260-2:201 6-03(en-fr) P arti e : E s s s d ' éval u ati on d ' u n m od èl e Copyright International Electrotechnical Commission TH I S P U B L I C ATI O N I S C O P YRI G H T P RO TE C T E D C o p yri g h t © I E C , G e n e va , S w i tze rl a n d All rights reserved Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IEC's member National Committee in the country of the requester If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information Droits de reproduction réservés Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur Si vous avez des questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence IEC Central Office 3, rue de Varembé CH-1 21 Geneva 20 Switzerland Tel.: +41 22 91 02 1 Fax: +41 22 91 03 00 info@iec.ch www.iec.ch Abo u t th e I E C The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies Ab o u t I E C p u b l i c a ti o n s The technical content of IEC publications is kept under constant review by the IEC Please make sure that you have the latest edition, a corrigenda or an amendment might have been published I E C C atal og u e - 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webs tore i ec ch /cs c Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csc@iec.ch I E C 61 60 -2 ® Edition 201 6-03 I N TE RN ATI ON AL S TAN D ARD N ORM E I N TE RN ATI ON ALE E l ectroacou s ti cs – Octave-ban d an d fracti on al -octave-ban d fi l ters – P art : P attern -eval u ati on tes ts É l ectroacou s ti q u e – F i l tres d e ban d e d ' octave et d e ban d e d ' u n e fracti on d ' octave – P arti e : E s s s d ' éval u ati on d ' u n m od èl e INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 7.1 40.50 ISBN 978-2-8322-3245-3 Warn i n g ! M ake s u re th at you obtai n ed th i s pu bl i cati on from an au th ori zed d i s tri bu tor Atten ti on ! Veu i l l ez vou s as s u rer q u e vou s avez obten u cette pu bl i cati on vi a u n d i s tri bu teu r ag réé ® Registered trademark of the International Electrotechnical Commission Copyright International Electrotechnical Commission –2– I EC 61 260-2: 201 © I EC 201 CONTENTS FOREWORD I NTRODUCTI ON Scope Normative references Terms and definitions Submission for testing Marking of the filter and information in the instruction manual Mandatory facilities and general requirements General Test instruments Tests at reference conditions General Relative attenuation, effective bandwidth deviation and summation of output signals 2.1 General 2.2 Relative attenuation 1 2.3 Effective bandwidth deviation 1 2.4 Summation of output signals 1 Linear operating range, measurement range, level range control and overload indicator Time-invariant operation Power supply check Electromagnetic and electrostatic compatibility requirements General I nfluence of electrostatic discharges I nfluence of AC power-frequency and radio-frequency fields 3.1 I nput signal 3.2 Range setting 3.3 AC power-frequency tests 3.4 Radio-frequency tests Radio-frequency emissions and public power supply disturbances Sensitivity to ambient air temperature and relative humidity Pattern-evaluation report Annex A (informative) Uncertainty related to test by sinusoidal sweeps A General A Digitally generated signal A Test signal from a signal generator 20 A Comparing measurements 21 Annex B (informative) Test of time invariant operation with the use of an exponential sweep – Example 22 B General 22 B Example 22 Bibliography 24 Copyright International Electrotechnical Commission I EC 61 260-2: 201 © I EC 201 –3– I NTERNATI ONAL ELECTROTECHNI CAL COMMISSI ON E L E C T RO AC O U S T I C S – O C T AVE - B AN D AN D F RAC T I O N AL -O C T AVE -B AN D F I L T E RS – P a rt : P a t te rn -e v a l u a ti o n t e s t s FOREWORD ) The I n ternati onal Electrotechnical Commi ssi on (I EC) is a world wi d e organizati on for standard ization comprisi ng all nati onal electrotechnical com mi ttees (I EC N ati onal Com mittees) The object of I EC i s to promote i nternati onal co-operati on on al l q u esti ons concerni ng stand ard izati on i n the electrical and el ectronic fi el d s To th is end and in ad di ti on to other acti vi ti es, I EC pu blishes I ntern ati onal Stand ards, Technical Speci fi cati ons, Technical Reports, Pu bl icly Avail abl e Specificati ons (PAS) and Gu i d es (hereafter referred to as “I EC Pu blicati on(s)”) Th ei r preparati on is entru sted to technical committees; an y I EC N ati onal Committee i nterested i n th e su bject d eal t wi th may parti ci pate i n thi s preparatory work I n ternati onal , govern mental and nongovernmental organ izati ons l iaisi ng wi th the I EC al so participate i n this preparati on I EC coll aborates cl osel y with the I nternati onal Organizati on for Stand ard izati on (I SO) i n accordance with cond i ti ons d etermined by ag reement between the two organizati ons 2) The formal d ecisions or agreements of I EC on technical matters express, as nearl y as possibl e, an i nternati onal consensus of opi ni on on the rel evant su bjects si nce each technical committee h as represen tati on from all i nterested I EC N ati onal Commi ttees 3) I EC Pu blicati ons h ave the form of recommend ati ons for internati onal u se an d are accepted by I EC N ati onal Com mittees i n that sense Whi le all reasonabl e efforts are mad e to ensu re that the techn ical content of I EC Pu blicati ons is accu rate, I EC can not be hel d responsi bl e for the way in whi ch they are used or for any misinterpretati on by an y end u ser 4) I n ord er to promote i nternational u ni formi ty, I EC N ati onal Commi ttees und ertake to appl y I EC Publications transparentl y to th e maxim um extent possi bl e i n thei r nati onal an d regi onal pu blicati ons Any d i vergence between any I EC Pu bl icati on and th e correspond i ng nati onal or regional publi cation shal l be cl earl y i n di cated in the l atter 5) I EC i tsel f d oes n ot provi d e an y attestation of formity I nd epen d ent certi ficati on bod ies provi d e conformity assessment services and , in some areas, access to I EC m arks of conform i ty I EC i s not responsible for any services carried ou t by i nd epend ent certification bodi es 6) All users should ensu re that they have the l atest edi ti on of this pu blicati on 7) N o li abili ty shal l attach to I EC or i ts di rectors, empl oyees, servants or agen ts incl u di ng i nd ivi d u al experts and m embers of i ts tech ni cal comm ittees and I EC N ati onal Committees for any personal i nju ry, property d amag e or other d amage of any natu re whatsoever, whether di rect or i nd i rect, or for costs (i nclud i n g l egal fees) and expenses arising ou t of th e pu bli cati on , use of, or rel iance u pon, thi s I EC Pu bl ication or any oth er I EC Pu blicati ons 8) Attention is d rawn to the N ormative references ci ted i n this pu bl icati on U se of the referenced pu blicati ons is i nd i spensabl e for th e correct appli cati on of this pu blicati on 9) Attention is d rawn to the possibili ty th at some of the el em ents of thi s I EC Pu bl icati on may be the su bj ect of paten t ri ghts I EC shal l not be h eld responsi bl e for id enti fyi ng an y or all such patent ri g hts I nternational Standard I EC 61 260-2 has been prepared by I EC technical committee 29: Electroacoustics This first edition of I EC 61 260-2 (together with I EC 61 260-1 :201 and I EC 61 260-3:201 6), cancels and replaces the first edition of I EC 61 260 published in 995 and its Amendment published in 2001 This edition constitutes a technical revision This edition includes the following significant technical changes with respect to I EC 61 260 a) The single document in the first edition of IEC 61 260:1 995 is now separated into three parts of the I EC 61 260 series covering: specifications, pattern-evaluation tests and periodic tests b) I EC 61 260:1 995 specified three performance categories: class 0, and while the I EC 61 260 series specifies requirements for class and c) I n I EC 61 260: 995, the design goals for the specification can be based on base-2 or base1 design I n the I EC 61 260 series only base-1 is specified Copyright International Electrotechnical Commission –4– I EC 61 260-2: 201 © I EC 201 d) The reference environmental conditions have been changed from 20 °C/65 % RH to 23 °C/50 % RH ; e) I EC 61 260:1 995 specified tolerance limits without considering the uncertainty of measurement for verification of the specifications The I EC 61 260 series specifies acceptance limits for the observed values and maximum-permitted uncertainty of measurements for laboratories testing conformance to specifications in the standard The text of this standard is based on the following documents: CDV Report on voti ng 29/845/CDV 29/881 A/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table This publication has been drafted in accordance with the ISO/I EC Directives, Part A list of all the parts of the I EC 61 260 series, published under the general title Electroacoustics – Octave-band and fractional-octave-band filters can be found on the I EC website The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the I EC website under "http: //webstore iec.ch" in the data related to the specific publication At this date, the publication will be • • • • reconfirmed, withdrawn, replaced by a revised edition, or amended Copyright International Electrotechnical Commission I EC 61 260-2: 201 © I EC 201 –5– I NTRODUCTI ON I EC 61 260:1 995 and I EC 61 260:1 995/AMD :2001 are now separated into the following three parts of I EC 61 260 series: • • • Part : Specifications Part 2: Pattern-evaluation tests Part 3: Periodic tests For assessments of conformance to performance specifications, I EC 61 260-1 uses different criteria than were used for the I EC 61 260: 995 edition I EC 61 260:1 995 did not provide any requirements or recommendations to account for the uncertainty of measurement in assessments of conformance to specifications This absence of requirements or recommendations to account for uncertainty of measurement created ambiguity in determinations of conformance to specifications for situations where a measured deviation from a design goal was close to the limit of the allowed deviation I f conformance was determined based on whether a measured deviation did or did not exceed the limits, the end-user of the octave-band and fractional-octave-band filters incurred the risk that the true deviation from a design goal exceeded the limits To remove this ambiguity, I EC Technical Committee 29, at its meeting in 996, adopted a policy to account for measurement uncertainty in assessments of conformance in I nternational Standards that it prepares This edition of IEC 61 260-2 uses an amended criterion for assessing conformance to a specification Conformance is demonstrated when (a) measured deviations from design goals not exceed the applicable a cce p ta n ce lim its and (b) the uncertainty of measurement does not exceed the corresponding maximum-permitted uncertainty Acceptance limits are analogous to the tolerance limits allowances for design and manufacturing implied in the I EC 61 260:1 995 Actual and maximum-permitted uncertainties of measurement are determined for a coverage probability of 95 % Unless more specific information is available, the evaluation of the contribution of a specific filter or filter set to a total measurement uncertainty can be based on the acceptance limits and maximum-permitted uncertainties specified in this standard Copyright International Electrotechnical Commission –6– I EC 61 260-2: 201 © I EC 201 E L E C T RO AC O U S T I C S – O C T AVE - B AN D AN D F RAC T I O N AL -O C T AVE -B AN D F I L T E RS – P a rt : P a t te rn -e v a l u a ti o n t e s t s S cope This part of I EC 61 260 provides details of the tests necessary to verify conformance to all mandatory specifications given in I EC 61 260-1 : 201 for octave-band and fractional-octaveband filters 1 Tests and test methods are applicable to class and class bandpass filters The aim is to ensure that all testing laboratories use consistent methods to perform pattern-evaluation tests 2 N o rm a t i v e re fe re n c e s 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 (including any amendments) applies I EC 61 000-4-2: 2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement techniques – Electrostatic discharge immunity test I EC 61 000-4-3: 2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test I EC 61 000-4-6: 201 3, Electromagnetic compatibility (EMC) – Part 4-6: Testing and measurement techniques – Immunity to conducted disturbances, induced by radio-frequency fields I EC 61 000-6-1 , Electromagnetic compatibility (EMC) – Part 6-1: Generic standards – Immunity for residential, commercial and light-industrial environments I EC 61 000-6-2: 2005, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards – Immunity for industrial environments I EC 61 000-6-3, Electromagnetic compatibility (EMC) – Part 6-3: Generic standards – Emission standard for residential, commercial and light-industrial environments IEC 61 260-1 : 201 4, Electroacoustics – Octave-band and fractional-octave-band filters – Part 1: Specifications IEC 61 672-1 , Electroacoustics – Sound level meters – Part 1: Specifications CI SPR 6-1 -1 , Specification for radio disturbance and immunity measuring apparatus and methods – Part 1-1: Radio disturbance and immunity measuring apparatus – Measuring apparatus Copyright International Electrotechnical Commission I EC 61 260-2: 201 © I EC 201 CI SPR 6-1 -2, Sp e cifica tion –7– fo r dio disturb a n ce and imm un ity me a surin g a p p a tus and me th ods – Pa rt -2: Ra dio disturb a n ce a n d im mun ity m e a surin g a p p a tus – Co up lin g de vice s fo r ducte d disturb a n ce me a sure m e n ts CI SPR 6-2-1 , me th ods – Sp e cifica tio n Pa rt 2-1 : for dio Me th ods disturb a n ce and imm un ity o f m e a sure me n t o f disturb a n ce s me a surin g a p p a tus a n d im mun ity – and Co n ducte d disturb a n ce m e a sure m e n ts CI SPR 6-2-3, me th ods – Sp e cifica tio n Pa rt 2-3: for dio Me th o ds disturb a n ce o f me a sure m e n t and imm un ity o f disturb a n ce s me a surin g and a p p a tus imm un ity – and Ra dia te d disturb a n ce m e a sure m e n ts CI SPR 22: 2008, In forma tio n te ch n o lo gy e quip m e n t – Ra dio disturb a n ce ch a cte ristics – L im its a n d m e th ods o f me a sure m e n t I SO/I EC Guide 98-3, Un ce rta in ty of m e a sure me n t – Pa rt 3: G uide to th e e xp re ssion of un ce rta in ty in m e a sure me n t (GUM:1 995) I SO/I EC Guide 98-4, Un ce rta in ty o f me a sure m e n t – Pa rt : Ro le o f me a sure m e n t un ce rta in ty in co n formity a sse ssme n t I SO/I EC Guide 99, In te rn a tion a l vo ca b ula ry o f m e tro lo gy – B a sic a n d ge n e l co n ce p ts a n d a ssocia te d te rms (VIM) Term s an d d efi n i ti on s For the purposes of this document, the terms and definitions given in I EC 61 260-1 :201 4, I EC 61 000-4-2, I EC 61 000-4-3, IEC 61 000-6-1 , I EC 61 000-6-2, and I EC 61 000-6-3, ISO/I EC Guide 98-3, I SO/I EC Guide 98-4 and I SO/I EC Guide 99 apply S u bm i s s i on for tes ti n g At least three specimens of the same pattern of bandpass filter shall be submitted for pattern-evaluation testing As a minimum, the testing laboratory shall select two of the specimens for testing At least one of the two specimens shall then be tested fully according to the procedures of this standard The testing laboratory shall decide whether the full tests shall also be performed on the second specimen or whether limited testing is adequate to approve the pattern An instruction manual and all items or accessories that are identified in the instruction manual as integral components for the normal mode of operation shall be submitted along with the filters 4 I f the manufacturer of the filters supplies devices that are to be connected to the bandpass filter by cables for a typical mode of operation for the filter, then the devices and cables shall be submitted with the filter M arki n g of th e fi l ter an d i n form ati on i n th e i n s tru cti on m an u al I t shall be verified that the filter is marked according to the requirements of I EC 61 260-1 : 201 5 I t shall be verified that the instruction manual contains all the information that is required by I EC 61 260-1 :201 as relevant to the facilities provided by the filter Copyright International Electrotechnical Commission –8– I EC 61 260-2: 201 © I EC 201 I f the filter does not conform to the requirements of and 2, no pattern-evaluation tests shall be performed 5 After completion of all tests, the information shall be reviewed to ensure that it is correct and that no applicable acceptance limits are exceeded M an datory faci li ties an d gen eral requ i rem en ts Gen eral No test specified in this part of I EC 61 260 series shall be omitted unless the bandpass filter does not possess the feature described for the test When the design of a fractional-octave-band filter, which has been pattern approved, is changed and a new pattern approval is requested, then – at the discretion of the testing laboratory – it is not necessary to repeat those tests for performance characteristics that are not affected by the design change 1 I f the filter does not possess the mandatory features listed in I EC 61 260-1 :201 4, such as overload indicator or means to check that the power supply is adequate for battery powered instruments which contain the filter, the filter does not conform to the specifications of I EC 61 260-1 :201 4, and no pattern-evaluation tests shall be performed For all pattern-evaluation tests, the configuration of the filter shall be as specified in the instruction manual for one of the normal modes of operation, including required accessories All configurations of the filter that are stated in the instruction manual as conforming to the requirements of I EC 61 260-1 : 201 shall be tested I f the instruction manual states that the filter conforms to the specifications of IEC 61 260-1 : 201 with optional facilities installed, the combination with the optional facilities installed shall also be tested to verify conformance to the relevant specifications I f the filter is enclosed in an instrument containing a level detector and a display device for displaying the level of the filtered signal with a resolution of at least 0, dB, the displayed value from this display device shall be used for testing, if appropriate I f an electrical output is provided corresponding to the displayed value and the testing laboratory intends to utilize the electrical output instead of the display device, the laboratory shall verify that changes in the levels of applied electrical input signals produce corresponding changes in the signal levels indicated on the display device and at the electrical output that are in accordance with the specifications of I EC 61 260-1 : 201 For bandpass filters that are designed to operate with measuring devices that comply with the requirements for sound level meters as specified in I EC 61 672-1 , the display indicator of this device shall be used to measure the level of the output signal from the filter set 6 For filter sets with digital readout devices, or with output that is available in a manufacturer-specified digital format (for example over a digital interface connection), the level of the output should be determined from the numeric readout or via the digital output to a suitable display or recording device Where multiple outputs are present, if an output is specified in the instruction manual for testing, this output shall be used for the patternevaluation tests I f the instruction manual specifies a procedure for adjusting the filter, e.g sensitivity adjustment, this procedure shall be followed before any measurements are performed For all tests, the filter shall be powered from its preferred supply I f the instruction manual specifies requirements for the internal batteries, such batteries shall be installed for the pattern-evaluation tests Copyright International Electrotechnical Commission