IEC 61 753 052 6 Edition 1 0 201 6 07 INTERNATIONAL STANDARD Fibre optic interconnecting devices and passive components – Performance standard – Part 052 6 Single mode fibre non connectorized fixed at[.]
I E C 61 53 -0 52 -6 ® Edition 201 6-07 I N TE RN ATI ON AL S TAN D ARD F i bre opti c i n tercon n ecti n g d evi ces an d pas s i ve com pon en ts – Perform an ce s tan d ard – Part 52 -6: S i n g l e-m od e fi bre n on -con n ectori zed fi xed atten u ator – C ateg ory O IEC 61 753-052-6:201 6-07(en) i n ou ts i d e pl an t en vi ron m en t 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 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 Abou 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 - webs tore i ec ch /catal og u e E l ectroped i a - www el ectroped i a org The stand-alone application for consulting the entire bibliographical information on IEC International Standards, Technical Specifications, Technical Reports and other documents Available for PC, Mac OS, Android Tablets and iPad The world's leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions in English and French, with equivalent terms in additional languages Also known as the International Electrotechnical Vocabulary (IEV) online I E C pu bl i cati on s s earch - www i ec ch /s earch pu b I E C G l os s ary - s td i ec ch /g l os s ary The advanced search enables to find IEC publications by a variety of criteria (reference number, text, technical committee,…) It also gives information on projects, replaced and withdrawn publications 65 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002 Some entries have been collected from earlier publications of IEC TC 37, 77, 86 and CISPR I E C J u st P u bl i s h ed - webs tore i ec ch /j u s u bl i s h ed Stay up to date on all new IEC publications Just Published details all new publications released Available online and also once a month by email Copyright International Electrotechnical Commission I E C C u s to m er S ervi ce C en tre - webs tore i ec ch /cs c If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csc@iec.ch I E C 61 53 -0 52 -6 ® Edition 201 6-07 I N TE RN ATI ON AL S TAN D ARD F i bre opti c i n tercon n ecti n g d evi ces an d pas s i ve com pon en ts – P erform an ce s tan d ard – Part 52 -6: S i n g l e-m od e fi bre n on -con n ectori zed fi xed atten u ator – C ateg ory O i n ou ts i d e pl an t en vi ron m en t INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.1 80.20 ISBN 978-2-8322-3547-8 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 ® Registered trademark of the International Electrotechnical Commission Copyright International Electrotechnical Commission –2– I EC 61 753-052-6: 201 © I EC 201 CONTENTS FOREWORD Scope N ormative references Test Test report Performance requirements Sample size, sequencing and grouping Dimensions Test details and requirements Annex A (normative) Test sequencing for single-mode non-connectorized fixed attenuators, category O 1 Bibliography Table – Test details and requirements Table A – Test sequence for single-mode non-connectorized fixed attenuators, category O 1 Copyright International Electrotechnical Commission I EC 61 753-052-6: 201 © I EC 201 –3– I NTERNATI ONAL ELECTROTECHNI CAL COMMI SSI ON F I B RE O P T I C I N T E RC O N N E C T I N G D E VI C E S AN D P AS S I VE C O M P O N E N T S – P E RF O RM AN C E S T AN D ARD – P a rt - : S i n g l e - m o d e fi b re n o n -c o n n e c t o ri z e d fi xe d a t t e n u a t o r – C a t e g o ry O i n o u t s i d e p l a n t e n v i ro n m e n t FOREWORD ) The I ntern ati on al El ectrotechni cal Com mi ssi on (I EC) i s a worl d wi d e organi zati on for stand ard i zati on com prisi ng al l nati onal el ectrotech ni cal commi ttees (I EC N ati on al Commi ttees) The obj ect of I EC i s to promote i ntern ati on al co-operati on on al l q u esti ons concerni ng stand ard i zation in the el ectri cal and el ectroni c fi el d s To th i s end an d i n ad d i ti on to oth er acti vi ti es, I EC pu bl i shes I nternati onal Stand ard s, Tech ni cal Speci fi cati on s, Techni cal Reports, Pu bl i cl y Avai l abl e Specifi cati on s (PAS) and Gu i d es (hereafter referred to as “I EC Pu bl icati on(s)”) Thei r preparati on i s entru sted to techni cal commi ttees; an y I EC N ati onal Commi ttee i n terested i n the su bject d eal t wi th may parti ci pate i n thi s preparatory work I nternati on al , governmental and n ongovern mental organi zati ons l i si ng wi th the I EC al so parti ci pate i n th i s preparati on I EC col l aborates cl osel y wi th th e I nternational Organi zati on for Stand ard i zati on (I SO) i n accord ance wi th cond iti ons d etermi ned by ag reement between the two organ i zati ons 2) The formal d ecisi ons or ag reements of I EC on techn ical matters express, as nearl y as possi bl e, an i ntern ati on al sensu s of opi ni on on the relevant su bj ects si nce each tech ni cal com m ittee has representati on from al l i nterested I EC N ati onal Com mi ttees 3) I EC Pu bl i cati ons h ave the form of recomm end ati ons for i nternational u se an d are accepted by I EC N ati onal Com mi ttees i n that sense Wh i l e al l reasonabl e efforts are mad e to ensu re that the tech ni cal content of I EC Pu bl i cati ons i s accu rate, I EC can not be h el d respon sibl e for the way i n whi ch they are u sed or for any mi si nterpretati on by any end u ser 4) I n ord er to promote i ntern ati on al u ni formi ty, I EC N ati onal Commi ttees u n d ertake to appl y I EC Pu bl i cati on s transparen tl y to the m axi mu m extent possi bl e i n th ei r n ati on al an d regi on al pu bl i cati on s Any d i vergence between any I EC Pu bl i cati on and th e correspond i n g nati onal or regi on al pu bl i cati on shall be cl earl y i nd i cated i n th e l atter 5) I EC i tsel f d oes not provi d e any attestati on of formi ty I nd epend ent certi fi cati on bod i es provi d e conform ity assessm ent servi ces an d , i n some areas, access to I EC marks of conformi ty I EC i s not responsi bl e for any servi ces carried ou t by i nd epend ent certi fi cati on bod i es 6) Al l u sers shou l d ensu re that they have th e l atest ed i ti on of th i s pu bl icati on 7) N o li abi l i ty sh al l attach to I EC or i ts d i rectors, empl oyees, servants or agen ts i ncl u d i ng i n d i vi d u al experts and members of i ts techn i cal comm ittees and I EC N ati onal Commi ttees for an y personal i nj u ry, property d amage or other d amage of an y natu re wh atsoever, whether d i rect or i nd irect, or for costs (i ncl u d i ng l egal fees) and expenses ari si ng ou t of the pu bl i cati on, u se of, or rel iance u pon, th is I EC Pu bl i cati on or any other I EC Pu bl i cati ons 8) Attenti on i s d rawn to th e N ormati ve references ci ted i n th is pu bl i cati on U se of th e referenced pu bl i cati ons i s i nd i spensabl e for the correct appli cati on of thi s pu bl i cati on 9) Attention i s d rawn to the possi bi l i ty th at some of the el em ents of th i s I EC Pu bl i cati on may be th e su bj ect of patent rig hts I EC shal l not be hel d responsi bl e for i d enti fyi ng an y or al l su ch patent rig hts I nternational Standard I EC 61 753-052-6 had been prepared by subcommittee 86B: Fibre optic interconnecting devices and passive components of I EC technical committee 86: Fibre optics The text of this standard is based on the following documents: FDI S Report on voti ng 86B/3995/FDI S 86B/401 0/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table Copyright International Electrotechnical Commission –4– I EC 61 753-052-6: 201 © I EC 201 This publication has been drafted in accordance with the I SO/I EC Directives, Part A list of all parts in the I EC 61 753 series, published under the general title Fibre optic interconnecting devices and passive components – Performance standard, can be found on the I EC website Future standards in this series will carry the new general title as cited above Titles of existing standards in this series will be updated at the time of the next edition 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 A bilingual version of this publication may be issued at a later date Copyright International Electrotechnical Commission I EC 61 753-052-6: 201 © I EC 201 –5– F I B RE O P T I C I N T E RC O N N E C T I N G D E VI C E S AN D P AS S I VE C O M P O N E N T S – P E RF O RM AN C E S T AN D ARD – P a rt - : S i n g l e - m o d e fi b re n o n -c o n n e c t o ri z e d fi xe d a t t e n u a t o r – C a t e g o ry O i n o u t s i d e p l a n t e n v i ro n m e n t Scope This part of I EC 61 753 contains the minimum initial test and measurement requirements and severities which a fibre optic attenuator satisfies in order to be categorised as meeting the requirements of single-mode fibre non-connectorized fixed attenuator devices used in outside plant environments I EC 60869-1 contains the generic specification of the optical attenuator Optical performances specified in this document relate only to non-connectorized optical attenuators 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 60793-2-50, Optical fibres – Part 2-50: Product specifications – Sectional specification for class B single-mode fibres I EC 60794-2-50, Optical fibre cables – Part 50: Indoor cables – Family specification for simplex and duplex cables for use in terminated cable assemblies I EC 61 300-2-1 , Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-1: Tests – Vibration (sinusoidal) IEC 61 300-2-4, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-4: Tests – Fibre/cable retention IEC 61 300-2-5, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-5:Tests – Torsion I EC 61 300-2-9, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-9: Tests – Shock IEC 61 300-2-1 4, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-14: Tests – High optical power I EC 61 300-2-1 9, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-19: Tests – Damp heat (steady state) IEC 61 300-2-22, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-22: Tests – Change of temperature Copyright International Electrotechnical Commission –6– I EC 61 753-052-6: 201 © I EC 201 I EC 61 300-2-42, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-42: Tests – Static side load for strain relief I EC 61 300-2-44, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-44: Tests – Flexing of the strain relief of fibre optic devices IEC 61 300-2-48, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-48: Tests – Temperature-humidity cycling I EC 61 300-3-2, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-2: Examination and measurements – Polarization dependent loss in a single-mode fibre optic device I EC 61 300-3-3, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-3: Examinations and measurements – Active monitoring of changes in attenuation and return loss I EC 61 300-3-7, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-7: Examinations and measurements – Wavelength dependence of attenuation and return loss of single mode components Te s t All test methods are in accordance with the I EC 61 300 series Tests validate performance over the required operating wavelength and power range The samples shall be terminated onto single-mode fibres as per I EC 60793-2-50, type B1 or B1 or B6 in either coated fibres (primary and secondary) or reinforced cable format as per I EC 60794-2-50 Te s t report Fully documented test reports and supporting evidence shall be prepared and shall be available for inspection as evidence that the tests have been carried out and complied with 5 P e rform an ce re q u i rem e n ts S am p l e s i ze , s e q u e n ci n g an d g rou pi n g The sample size to be used for the tests shall be as defined in Annex A Di m en si on s Dimensions shall comply with those given in appropriate manufacturer's drawings Te s t d e tai l s an d req u i re m en ts Table defines the performance requirements and test details for single-mode nonconnectorized fixed attenuators, category O Copyright International Electrotechnical Commission I EC 61 753-052-6: 201 © I EC 201 –7– Tabl e – Te s t d e tai l s an d req u i re m en ts N o Te s ts Atten u ation I EC 61 300-3-7 Retu rn l oss I EC 61 300-3-7 Re q u i re m e n ts Operati ng wavel ength range: 260 nm to 360 nm and /or 460 nm to 625 n m For nomi nal val u es ≤ d B, the tol erance shal l be ≤ ± 0, d B arou n d the nom i nal i n serti on l oss val u e For nom in al val u es > d B, th e tol erance sh al l be ≤ ± % arou nd the nomi nal i nserti on l oss val u e ≥ 50 d B D e ta i l s M ethod : Lau n ch patchcord length: Lau n ch cond i ti ons: Opti cal sou rce wavel en gth : Sou rce power stabi l i ty: Total u ncertai nty: M eth od : Opti cal sou rce wavel en gth: Other req u i rements: Pol ari zati on d epend ent l oss I EC 61 300-3-2 ≤ 0, d B at 550 n m The sampl es shal l be termi nated onto si ngl emod e fi bres as per I EC 60793-2-50 H i gh opti cal Before, d u ri ng an d after the power test, th e i nserti on l oss sh al l I EC 61 300-2-1 meet th e req u irem ents of test N o Before, d u ri ng an d after the test, th e retu rn l oss shal l meet th e req u irem ents of test N o Du ri ng the test, i n serti on l oss and retu rn l oss shal l be moni tored Du ri ng the test, the maxi mu m al l owed ch ang e i n i nserti on l oss i s: ≤ ± 0, d B for attenu ator ≤ d B ≤ ± 0% for atten u ators > d B Copyright International Electrotechnical Commission Total u ncertai nty: M ethod : Opti cal sou rce wavel ength: Total u n certai nty: M ethod : Test tem peratu re: Opti cal sou rce wavel en gth: Test d u ration: Power: M ethod B2 ≥ m Onl y the fu n d amental mod e sh al l propagate at th e attenu ator in terface and at th e d etector The wavel ength of the sou rce shal l be longer than cu t-off wavel en gth of the fi bre Tu n abl e narrowband non pol ari zed sou rce 260 nm to 360 nm and 460 n m to 660 nm Withi n ± 0, 05 d B over the measu ri ng peri od or at l east h ≤ ± 0, d B m easu rement meth od OCWR 31 nm ± n m, 550 n m ± n m and 625 n m ± nm Test every sampl e with the three wavel ength s Thi s test sh al l be perform ed twi ce, reversi ng the sampl e Both m easu rements shal l be wi th i n the speci fi ed l i mi ts ≤ ± dB 31 nm ± nm, 550 nm ± nm and /or 625 n m ± nm ≤ ± 0, 05 d B over th e d ynami c range to be measu red 25 °C ± °C 550 nm ± n m h For n omi nal i nserti on l oss ≤ d B: 00 m W conti nu ou s power i ncremen ts For n omi nal i nserti on l oss > d B: mW conti n u ou s power i ncrements The above i ncremen ts are appli ed u p to the maxi mu m al l owed power i n pu t of 00 m W –8– N o Tests Requirements Damp heat Before and after th e test, (stead y state) the i nserti on l oss I EC 61 300-2-1 req u i remen ts of test N o shal l be met Before and after th e test, the retu rn loss req u i rement of test N o sh al l be met Du ri ng the test, the chang e i n I nserti on Loss shal l be measu red by test meth od I EC 61 300-3-3 I EC 61 753-052-6: 201 © I EC 201 Details Tem peratu re: + 75 °C ± °C Rel ati ve hu mi d i ty: Du rati on : Opti cal sou rce wavel en gth: > 90 % RH ± % RH M axi mu m sampl i ng i nterval d u ri ng the test: Speci men opti cal l y fu ncti oni ng: Vi brati on I EC 61 300-2-1 Before, d u ri ng an d after the test, th e i n sertion l oss sh al l meet th e req u i rements of test N o Before and after th e test, the retu rn loss shal l meet the req u i rements of test N o Du ri ng test, the ch ange i n i nserti on l oss shal l be ≤ ± 0, d B Freq u ency range: Constant vibrati on ampl i tu d e: Du rati on per axi s: N u mber of axes: Sweep rate: Opti cal sou rce wavel en gth: Speci men opti cal l y fu ncti oni ng: Sh ock I EC 61 300-2-9 Copyright International Electrotechnical Commission Before and after th e test, the i nserti on l oss shal l meet the req u i rements of test N o Before and after th e test the retu rn l oss sh al l meet the req u i remen ts of test N o Accel erati on force: N u mber of axes: N u mber of cycl es: Du rati on per axi s: M easu remen ts req u i red : Speci men opti cal l y fu ncti on i ng: Opti cal sou rce Wavel ength 68 h 31 nm ± n m, 550 nm ± n m and /or 625 nm ± nm Before and after the test the sampl es wi l l be measu red wi th three wavel engths Du ri ng the test the sampl es wi l l be measu red wi th one wavel ength h Yes H z to 55 H z , 52 mm 2h orth ogon al octave/mi n 31 nm ± nm, 550 nm ± n m an d /or 625 nm ± nm Before and after th e test the sampl es wi l l be measu red wi th three wavel ength s Du ri n g the test the sampl es wi l l be measu red wi th one wavel ength Yes 000 m/s axes, d i recti ons shocks per d i recti on, shocks total N omi nal ms d u rati on, hal f sin e pu l se Before, after each axi s, and after the test No 31 nm ± nm , 550 nm ± nm and /or 625 n m ± nm I EC 61 753-052-6: 201 © I EC 201 N o Tests Ch ange of temperatu re I EC 61 300-222 Requirements Before, d u ri ng and after the test, th e i nserti on l oss req u i rements of test N o sh al l be met Before and after th e test, the retu rn l oss req u i remen t of test N o sh al l be met –9– M ethod : High temperatu re: Low temperatu re: N u mber of cycles: Rate of temperatu re chan ge: Du rati on at extrem e temperatu res: Opti cal sou rce wavel eng th: Temperatu rehu mi d i ty cycl i n g I EC 61 300-248 Before, d u ri ng and after the test, th e i nserti on l oss sh al l meet the req u i rements of test N o Before and after th e test, the retu rn l oss sh al l meet the req u i remen ts of test N o M axi mu m sampl in g i n terval d u ri ng th e test: Specim en opti cal l y fu ncti on in g: M ethod : Temperatu re range: Rel ati ve hu mi d i ty: Du rati on: Rate of temperatu re chan ge: N u mber of cycles: Opti cal sou rce wavel eng th: Specim en opti cal l y fu ncti on in g: Copyright International Electrotechnical Commission Details Test N b Du rin g the test the chang e i n i n sertion l oss sh al l be measu red by test m ethod I EC 61 300-3-3 + 75 °C ± °C –40 °C ± °C 10 °C/mi n Dwell at + 23 °C allowed between temperature extreme h 31 nm ± nm, 550 nm ± nm an d /or 625 nm ± n m Before and after the test th e sampl es wi ll be measu red wi th th ree wavel eng ths Du ri ng the test th e sam pl es wil l be m easu red wi th on e wavel eng th mi n Yes Method A Du rin g the test, th e change i n i n serti on l oss shal l be measu red by test meth od I EC 61 300-3-3 (-40 ± 2) °C to (+85 ± 2) °C for pri mary, secon d ary coated fi bre, and rei nforced cables, bu t l i mi ted to: (-40 ± 2) °C to ( + 75 ± 2) °C for LSZH cabl es 85 % RH ± % RH at the maxi mu m temperatu re h mi ni mu m d u rati on at extremes °C /mi n rate of chang e 42 31 nm ± nm, 550 nm ± nm an d /or 625 nm ± n m Before and after the test th e sampl es wi ll be measu red wi th th ree wavel eng ths Du ri ng the test th e sam pl es wil l be m easu red wi th on e wavel eng th Yes – 10 – N o 10 11 12 Tests Opti cal fi bre cabl e fl exi ng I EC 61 300-244 Torsi on/twi st I EC 61 300-2-5 Stati c si d e l oad a I EC 61 300-242 Requirements Before and after th e test, the i nserti on l oss shal l meet th e req u irements of test N o Before and after th e test, the retu rn l oss sh al l meet the req u i remen ts of test N o Before and after the test, the i n serti on l oss shal l meet the req u i remen ts of test N o Before and after the test, the retu rn l oss shal l meet the req u i rements of test N o Before and after the test, the in serti on l oss shal l m eet the req u i rements of test N o Before and after the test, the retu rn l oss sh al l meet the req u i remen ts of test N o I EC 61 753-052-6: 201 © I EC 201 Details M ethod : M agni tu d e of the l oad : Ang l e of d efl ecti on per cycle: N u mber of cycles: Specim en opti cal l y fu ncti on in g: M ethod of mou nti n g: M ethod : M agni tu d e of the l oad : Rate of l oad appl i cati on : N u mber of cycles: Specim en opti cal l y fu ncti on in g: Fi bre/cabl e reten ti on I EC 61 300-24 Before and after th e test, the i nserti on l oss shal l meet th e req u irements of test N o Before and after th e test, the retu rn l oss sh al l meet the req u i remen ts of test N o Du ri ng the test, the ch ange i n i nserti on l oss sh al l be ≤ ± 0, d B No The sampl e shal l be ri gi d l y mou nted su ch that the l oad i s onl y appl i ed to th e fi bre/cabl e I EC 61 300-2-5 5, N at 0, N /s for rei n forced cabl es 2, N at 0, N /s for pri m ary and secon d ary coated fi bres 0, N /s cycl es, ± 80° an gu l ar movemen t No N for s for rei nforced cabl e 2, N for s for pri mary and secon d ary coated fi bres Load appl i cation poi nt: 0, m from the end of the d evi ce and two m u tu al l y perpen d i cu l ar d i recti on s as permi tted by the prod u ct d esi g n No M agni tu d e of the l oad : Load appl i cation poi nt: Du rati on of the l oad : M ethod of mou nti n g: Specim en opti cal l y fu ncti on in g: Opti cal sou rce wavel eng th: a 30 M agni tu d e of the l oad : Specim en opti cal l y fu ncti on in g: 13 N for rei nforced cabl e N for pri mary and second ary coated fi bres ± 90° Du ri ng the test, the ch ang e i n i nserti on l oss shal l be m easu red by test method I EC 61 300-3-3 N ± N at N /s for rei n forced cabl es 5, N ± 0, N at 0, N /s for secon d ary coated fi bres 2, N ± 0, N at 0, N /s for pri mary coated fi bres 0, m from poi nt wh ere th e fi bre/cabl e exi ts from th e speci m en 20 s d u rati on at N 60 s d u rati on at N or N The sampl e shal l be ri gi d l y mou nted su ch that the l oad i s onl y appl i ed to th e fi bre/cabl e reten ti on mechani sm Yes 31 nm ± nm, 550 nm ± nm an d /or 625 nm ± n m Static si d e l oad shal l be appl i ed i n two mu tu al l y perpend i cu l ar d i recti ons as permi tted by th e prod u ct d esi gn For exampl e, a prod u ct wi th a base pl ate extend i ng beyond the fi bre exi t m ay prohi bi t l oad i ng i n that d i recti on Copyright International Electrotechnical Commission I EC 61 753-052-6: 201 © I EC 201 – 11 – An n ex A (normative) Tes t s eq u en ci n g for s i n g l e-m od e n on -con n ectori zed fi xed atten u ators , categ ory O I EC 60068-1 describes the background for test sequencing Test sequencing is based on the premise that the effect one test parameter has on a specimen will depend on the previous test conditions to which the specimen has been exposed Therefore, it is necessary to conduct the tests in a specific order The choice of the sequence of tests is a function of the intended objectives and depends upon a number of considerations I t is recognized that it is difficult to provide a standardized type approval test sequence for all types of passive optical components, however, category O attempts to overcome this issue The intention is to use certain tests which will reveal damage caused by previous tests and to design a test sequence which would induce significant effects in passive optical components intended for applications in an uncontrolled environment The test sequence for passive optical components for category O is given in Table A Tab l e A – Te s t s e q u e n ce fo r s i n g l e -m od e n on -co n n e ctori ze d fi xe d atte n u ators , cate g o ry O N o Te s t S a m p l e s i ze S o u rce I nserti on l oss 12 N ew Retu rn Loss 12 Test Pol ari zati on d epend ence of i n sertion l oss 12 Test H i gh opti cal power Test Damp heat (stead y state) Test Vibrati on Test Shock Test Chan ge of temperatu re Test Tem peratu re hu mi d i ty cycl i n g Test 10 Opti cal fi bre cabl e fl exi ng Test 11 Torsi on/twi st Test 12 Stati c si d e l oad Test 1 13 Fi bre/cabl e retenti on Test N OTE Tests to are perform ed i n ord er; prod u ct i s sou rced as shown i n th e tabl e Copyright International Electrotechnical Commission – 12 – I EC 61 753-052-6: 201 © I EC 201 Bibliography I EC 60068-1 , Environmental testing – Part 1: General and guidance I EC 60869-1 , Fibre optic interconnecting devices and passive components – Fibre optic passive power control devices – Part 1: Generic specification I EC 61 300 (all parts), Fibre optic interconnecting devices and passive components – Basic test and measurement procedures I EC 61 300-3-28, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-28: Examinations and measurements – Transient loss _ Copyright International Electrotechnical Commission Copyright International Electrotechnical Commission I N TE RN ATI O N AL E LE CTRO TE CH N I CAL CO M M I S S I O N 3, ru e d e Va re m bé P O B ox CH -1 1 G e n e va S wi tze rl a n d Te l : + 41 F a x: + 22 91 02 1 22 91 03 00 i n fo @i e c ch www i e c ch Copyright International Electrotechnical Commission