1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1Fibre optic interconnecting devices and passive components Basic test andmeasurement procedures Part 2-48: Tests
2、Temperature-humidity cyclingBS EN 61300-2-48: 2009National forewordThis British Standard is the UK implementation of EN 61300-2-48:2009. It isidentical to IEC 61300-2-48:2009. It supersedes BS EN 61300-2-48:2003which is withdrawn.The UK participation in its preparation was entrusted by Technical Com
3、mitteeGEL/86, Fibre optics, to Subcommittee GEL/86/2, Fibre optic interconnectingdevices and passive components.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Use
4、rs are responsible for its correct application. BSI 2009ISBN 978 0 580 59416 8ICS 33.180.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 May 2009Amendments is
5、sued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 61300-2-48:2009EUROPEAN STANDARD EN 61300-2-48 NORME EUROPENNE EUROPISCHE NORM May 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektr
6、otechnische Normung Central Secretariat: avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61300-2-48:2009 E ICS 33.180.20 Supersedes EN 61300-2-48:2003English version Fibre optic interconnec
7、ting devices and passive components - Basic test and measurement procedures - Part 2-48: Tests - Temperature-humidity cycling (IEC 61300-2-48:2009) Dispositifs dinterconnexion et composants passifs fibres optiques - Mthodes fondamentales dessais et de mesures - Partie 2-48: Essais - Cycles dhumidit
8、et de temprature (CEI 61300-2-48:2009) Lichtwellenleiter -Verbindungselemente und passive Bauteile - Grundlegende Prf- und Messverfahren - Teil 2-48: Prfungen - Temperatur-Feuchte-Zyklus (IEC 61300-2-48:2009) This European Standard was approved by CENELEC on 2009-04-01. CENELEC members are bound to
9、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 national standards may be obtained on application to the Central
10、 Secretariat or to any CENELEC 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 CENELEC member into its own language and notified to the Central Secretariat has the same statu
11、s as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Pol
12、and, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 61300-2-48:2009EN 61300-2-48:2009 2 Foreword The text of document 86B/2807/FDIS, future edition 2 of IEC 61300-2-48, prepared by SC 86B, Fibre optic interconnecting devices and passive components, of
13、 IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61300-2-48 on 2009-04-01. This European Standard supersedes EN 61300-2-48:2003. The main changes are the addition of the Category O cycle procedure and the severity reconsideration. The followi
14、ng dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2010-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-04-01 Annex ZA has been add
15、ed by CENELEC. _ Endorsement notice The text of the International Standard IEC 61300-2-48:2009 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 61300-2-21 NOTE Har
16、monized as EN 61300-2-21:1997 (not modified). IEC 61300-2-46 NOTE Harmonized as EN 61300-2-46:2006 (not modified). _ BS EN 61300-2-48:2009 3 EN 61300-2-48:2009 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referen
17、ced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common mod
18、ifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 61300-1 - 1)Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 1: General and guidance EN 61300-1 2003 2)IEC 61300-3-1 - 1)Fibre optic interconnect
19、ing devices and passive components - Basic test and measurement procedures - Part 3-1: Examinations and measurements - Visual examination EN 61300-3-1 2005 2)IEC 61300-3-4 - 1)Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-4: Examinations
20、and measurements - Attenuation EN 61300-3-4 2001 2)1)Undated reference. 2)Valid edition at date of issue. BS EN 61300-2-48:2009 2 61300-2-48 IEC:2009(E) CONTENTS 1 Scope.5 2 Normative references .5 3 General description 5 4 Apparatus.6 4.1 Chamber .6 4.2 Optical source and detector.6 5 Procedure 6 5
21、.1 Preparation of specimens6 5.2 Preconditioning .6 5.3 Initial examinations and measurements .6 5.4 Conditioning 6 5.4.1 Method A.6 5.4.2 Method B.7 5.5 Recovery.8 5.6 Final examinations and measurements8 6 Severity9 7 Details to be specified 9 Bibliography10 Figure 1 Temperature-humidity profile f
22、or Tmax= 65 C, Tmin= 10 C 7 Figure 2 Temperature-humidity profile for Tmax= 85 C .8 Table 1 Test severities.9 BS EN 61300-2-48:200961300-2-48 IEC:2009(E) 5 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 2-48: Tests Temperature-humidity cycling 1
23、 Scope This part of IEC 61300 details a procedure for determining the suitability of a fibre optic device or closure to withstand variations in humidity and temperature that may occur during operation, storage and/or transport. The test is intended to indicate the performance of such devices when ex
24、posed to heat and humidity followed by short-term freezing. In general terms, this test provides a high temperature to induce potential failures due to softening and expansion, a high humidity to encourage moisture absorption and swelling and a low temperature to facilitate ice formation, embrittlem
25、ent and contraction. This test differs from other cyclic environmental tests, notably the damp heat cyclic test of IEC 61300-2-46 and the composite temperature-humidity cyclic test of 61300-2-21, by incorporating alternative levels of severity. This is achieved through a) a greater number of cycles;
26、 b) a greater cyclic temperature range; c) a decreased cyclic period. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced d
27、ocument (including any amendments) applies. IEC 61300-1, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 1: General and guidance IEC 61300-3-1, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part
28、3-1: Examinations and measurements Visual examination IEC 61300-3-4, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-4: Examinations and measurements Attenuation 3 General description The specimen is placed in an environmental chamber and subje
29、cted to a number of temperature-humidity cycles, as defined in the relevant specification. The attenuation of the specimen is monitored throughout the duration of the test. BS EN 61300-2-48:2009 6 61300-2-48 IEC:2009(E) 4 Apparatus 4.1 Chamber The apparatus shall consist of an environmental chamber
30、capable of maintaining the temperature and humidity requirements within the specified tolerances. The chamber shall be constructed so that it is capable of housing the specimen; it allows access for measurement; it is capable of maintaining homogeneous conditions; it uses distilled, demineralized or
31、 deionized water to achieve the required humidity conditions; no rust or corrosion contaminants are imposed on the specimen; no condensed water can fall on the specimen; the conditions experienced by the specimen and the temperature- and humidity-sensing devices are as similar as possible. 4.2 Optic
32、al source and detector The optical source and detector used to measure changes in attenuation shall comply with those specified in IEC 61300-3-4. NOTE A device to record attenuation over time (X, t) should be used where the optical detector does not have the capability to monitor continuously. 5 Pro
33、cedure 5.1 Preparation of specimens Prepare the specimen according to the manufacturers instructions or as specified in the relevant specification. The specimen shall be terminated with a sufficient length of fibre cable to facilitate connection with the optical source and detector. 5.2 Precondition
34、ing Place the specimen in the chamber and precondition for 2 h at the standard test conditions, as defined in IEC 61300-1 unless otherwise specified in the relevant specification. 5.3 Initial examinations and measurements Complete initial examinations and measurements on the specimen as required by
35、the relevant specification. 5.4 Conditioning Set the chamber temperature and humidity profile to achieve the specified severities. 5.4.1 Method A For Category O, it is necessary to move to transition rapidly from the low temperature to the high temperature without a dwell at 23 C. In this case, make
36、 the temperature changing according to the following cycle: The specimen shall be subjected to a temperature cycle from TmaxC 2 C to TminC 2 C for a total of 14 cycles, where Tmaxand Tminare defined by the relevant specification. BS EN 61300-2-48:200961300-2-48 IEC:2009(E) 7 Examples of Tmaxand Tmin
37、are shown in Table 1. Temperature change from 23 C to Tminand Tminto 23 C shall occur in 1 h. Temperature change from Tminto Tmaxand Tmaxto Tminmust occur faster (20 min max.) to maximize condensation. Dwell times for this test shall be a minimum of 2 h. NOTE Dwells occur at Tmax,23 C and TminC. The
38、 humidity shall be controlled from Tminto Tmaxas follows: at 23 C maintain a constant relative humidity of 95 %; between 23 C and Tmaxrelative humidity is uncontrolled; at Tmaxmaintain a constant relative humidity of 95 %; between Tmaxand Tminrelative humidity is uncontrolled; at Tminthe humidity is
39、 uncontrolled. However, water vapour should not be evacuated from the environmental chamber. This is to allow condensation and the formation of ice to occur. A schematic showing of an example of the temperature-humidity profile for Tmax= 65 C and Tmin= 10 C is shown in Figure 1. NOTE The tolerance o
40、n relative humidity values is 5 %. This means that the actual operating humidity may be up to 100 % RH, for short term operation, however a 95 % RH upper limit has been specified for practical measurement purposes. Attenuation measurements shall be made throughout the duration of the test. The atten
41、uation measurements shall be within the specified limits defined in the relevant specification. 20 10 0 10 20 30 40 50 60 70 0 2 4 6 8 10 12 14 Time (h)Temperature (C)Humidity control One cycle Humiditycontrol IEC 379/09 Figure 1 Temperature-humidity profile for Tmax= 65 C, Tmin= 10 C 5.4.2 Method B
42、 The specimen shall be subjected to a temperature cycle from TmaxC 2 C to 40 C 2 C for a total of 42 cycles, where Tmaxis the upper temperature limit, defined by the relevant specification. (Examples of Tmaxare shown in Table 1). The rate of temperature change shall be 1 C per minute and dwell times
43、 for this test shall be a minimum of 1 h. NOTE Dwells occur at Tmax,23 C and 40 C. The humidity shall be controlled from 10 C to Tmaxas follows: BS EN 61300-2-48:2009 8 61300-2-48 IEC:2009(E) at 23 C maintain a constant relative humidity of 85 %; between 23 C and Tmaxmaintain a nominal linear change
44、 in relative humidity; at Tmaxmaintain a constant relative humidity of 20 %; between 10 C and 23 C maintain a relative humidity of 85 %; below 10 C the humidity is uncontrolled. However, water vapour should not be evacuated from the environmental chamber. This is to allow condensation and the format
45、ion of ice to occur. A schematic showing an example of the temperature-humidity profile for Tmax= 85 C is shown in Figure 2. NOTE The tolerance on relative humidity values is 5 %. This means that the actual operating humidity may be up to 90 % RH, for short term operation; however a 85 % RH upper li
46、mit has been specified for practical measurement purposes. Attenuation measurements shall be made throughout the duration of the test. The attenuation measurements shall be within the specified limits defined in the relevant specification. 60 40 20 0 20 40 60 80 100 0 5 10 Time (h) Temperature (C) a
47、nd relativehumidity (%) Relative humidity Temperature dwelldwell dwelldwellIEC 3809 Figure 2 Temperature-humidity profile for Tmax= 85 C 5.5 Recovery Allow the specimen to remain under standard test conditions for 2 h, as defined in IEC 61300-1, unless otherwise specified in the relevant specificati
48、on. Clean the specimen according to the manufacturers instructions. 5.6 Final examinations and measurements On completion of the test, remove all fixtures and make final measurements, as defined by the relevant specification, to ensure that there is no permanent damage to the specimen. The results o
49、f the final measurement shall be within the limit established in the relevant specification. Unless otherwise specified, visually examine the specimen in accordance with IEC 61300-3-1. Check for evidence of any degradation in the specimen. This may include, for example broken, loose or damaged parts or accessories; BS EN 61300-2-48:200961300-2-48 IEC:2009(E) 9
