1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58components Basic test and measurement procedures Part 2-26: Tests Salt mistThe European Standard EN
2、 61300-2-26:2007 has the status of a British StandardICS 33.180.20Fibre optic interconnecting devices and passive BRITISH STANDARDBS EN 61300-2-26:2007BS EN 61300-2-26:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2007 BSI 200
3、7ISBN 978 0 580 54744 7Amendments issued since publicationAmd. No. Date Commentsrequest to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunit
4、y from legal obligations.National forewordThis British Standard is the UK implementation of EN 61300-2-26:2007. It is identical to IEC 61300-2-26:2007. It supersedes BS EN 61300-2-26:1997 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre o
5、ptics, to Subcommittee GEL/86/2, Fibre optic interconnecting devices and passive components.A list of organizations represented on this committee can be obtained on EUROPEAN STANDARD EN 61300-2-26 NORME EUROPENNE EUROPISCHE NORM June 2007 CENELEC European Committee for Electrotechnical Standardizati
6、on Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61300-2-26:2007 E
7、ICS 33.180.20 Supersedes EN 61300-2-26:1997English version Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-26: Tests - Salt mist (IEC 61300-2-26:2006) Dispositifs dinterconnexion et composants passifs fibres optiques - Mthodes fondamentales
8、 dessais et de mesures - Partie 2-26: Essais - Brouillard salin (CEI 61300-2-26:2006) Lichtwellenleiter - Verbindungselemente und passive Bauteile - Grundlegende Prf- und Messverfahren - Teil 2-26: Prfungen - Salznebel (IEC 61300-2-26:2006) This European Standard was approved by CENELEC on 2007-05-0
9、1. CENELEC 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 national standards may be obtain
10、ed on application to the Central 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 Centra
11、l Secretariat has the same status 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, Mal
12、ta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 86B/2267/CDV, future edition 2 of IEC 61300-2-26, prepared by SC 86B, Fibre optic interconnecting devices and passive components, of IEC TC 86,
13、 Fibre optics, was submitted to the IEC-CENELEC parallel Unique Acceptance Procedure and was approved by CENELEC as EN 61300-2-26 on 2007-05-01. EN 61300-2-26:2007 supersedes EN 61300-2-26:1997. Specific technical changes include the test conditions such as concentration, pH value and temperature of
14、 salt solution, relative humidity of air and regulations on final measurements. The following 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) 2008-02-01 latest date by which the national st
15、andards conflicting with the EN have to be withdrawn (dow) 2010-05-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61300-2-26:2006 was approved by CENELEC as a European Standard without any modification. _ EN 61300-2-26:2007 2 CONTENTS 1 Scope.4
16、2 Normative references .43 General description 44 Apparatus.44.1 Chamber .4 4.2 Water 54.3 Atomizer5 4.4 Heater .5 4.5 Humidifier5 4.6 Salt mist5 5 Procedure 6 5.1 Preparation of specimens6 5.2 Preconditioning .6 5.3 Initial measurements .6 5.4 Conditioning 6 5.5 Recovery.7 5.6 Final measurements 7
17、6 Severity7 7 Details to be specified 7 Bibliography. 9 EN 61300-2-26:2007 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications .10 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Par
18、t 2-26: Tests Salt mist 1 Scope This part of IEC 61300 provides a test to determine the corrosion resistance of the metals used in the construction of a device, and to determine if dissimilar metals have been well finished to prevent corrosion. 2 Normative references The following referenced documen
19、ts 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. IEC 60068-2-11, Environmental testing Part 2: Tests Test Ka: Salt mist IEC 61300-
20、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 3-1: Examinations and measurements Visual examination
21、IEC 61300-3-3, 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 in return loss 3 General description This procedure is conducted in accordance with IEC 60068-2-11,
22、test Ka. The specimen is exposed to a salt mist environment within a test chamber maintained at a temperature of 35 C. 4 Apparatus 4.1 Chamber The chamber for this test shall be constructed of such materials that will not influence the corrosive effects of the salt mist. The detailed construction of
23、 the chamber, including the method of producing the mist, is optional, provided that: a) the conditions in the chamber are within the limits specified; b) a sufficiently large volume with constant, homogeneous conditions (not affected by turbulence) is available; these conditions should not be influ
24、enced by the specimens under test; EN 61300-2-26:2007 4 c) no direct spray impinges upon the specimens under test; d) drops of liquid accumulating on the ceiling, the walls or other parts cannot drip on the specimens; e) the chamber is properly vented to prevent pressure build-up and allow uniform d
25、istribution of salt mist. The discharge end of the vent shall be protected from squalls which can cause strong air currents in the chamber. 4.2 Water Use distilled, demineralized or deionized water to obtain the specified humidity. No rust or corrosion contaminates shall be imposed on the specimen b
26、y the test facility. 4.3 Atomizer The atomizer(s) used shall be of such design and construction as to produce a finely divided, wet, dense mist. The atomizer(s) shall be made of material that is non-reactive to the salt solution. 4.4 Heater A chamber heating means and control. 4.5 Humidifier A means
27、 for humidifying the air at a temperature above the chamber temperature. 4.6 Salt mist 4.6.1 Salt solution 4.6.1.1 Concentration The salt used for the test shall be sodium chloride (NaCl) containing, when dry, not more than 0,1 % sodium iodide and not more than 0,3 % of total impurities. The salt so
28、lution concentration shall be (5 1) % by weight. The solution shall be prepared by dissolving (5 1) parts by weight of salt in 95 parts by weight of distilled or demineralized water. 4.6.1.2 pH value The pH value of the solution shall be between 6,5 and 7,2, at a temperature of (35 2) C The pH value
29、 shall be maintained within this range during conditioning; for this purpose, diluted hydrochloric acid or sodium hydroxide may be used to adjust the pH value, provided that the concentrations of NaCl remain within the prescribed limits. The pH shall be measured when preparing each new batch of solu
30、tion. 4.6.1.3 The sprayed solution shall not be re-used. 4.6.2 Air supply The compressed air entering the atomizer(s) shall be essentially free from all impurities, such as oil and dust. EN 61300-2-26:2007 5 Means shall be provided to humidify and warm the compressed air as required to meet the oper
31、ating conditions. The air pressure shall be suitable to produce a finely divided dense mist with the atomizer(s) used. To ensure against clogging of the atomizer by salt deposition, it is recommended that the air have a relative humidity of at least 85 % at the point of release from the nozzle. A sa
32、tisfactory method is to pass the air in very fine bubbles through a tower containing heated water which shall be automatically maintained at a constant level. The temperature of this water should be at least 35 C. The permissible water temperature increases with increasing volume of air and with dec
33、reasing heat insulation of the chamber and the surroundings of the chamber. The temperature should not exceed a value above which an excess of moisture is introduced into the chamber or a value which makes it impossible to meet the requirements for operating temperature. 5 Procedure 5.1 Preparation
34、of specimens Prepare and clean the specimen in accordance with the manufacturers instructions. Visually check (see IEC 61300-3-1) that the attachment of the cable to the fibre optic device is not damaged. 5.2 Preconditioning Pre-condition the specimen for 2 h at the standard test conditions as defin
35、ed in IEC 61300-1, unless otherwise specified in the relevant specification. 5.3 Initial measurements Complete initial examinations and measurements on the specimen as required by the relevant specification. 5.4 Conditioning Conduct the procedure in accordance with IEC 60068-2-11, test Ka. The prepa
36、ration of the specimen shall be in accordance with the relevant specification. Unless otherwise specified, the specimen shall be subjected to the test in a non-operational mode. Stabilize the chamber and the specimen to standard atmospheric conditions. Place the specimen in the chamber in its normal
37、 operating position including hook-ups to peripheral equipment (when required). Adjust the chamber temperature, humidity, salt concentration and pH to the specified severity. Where optical measurements are required during the test, measurements shall be made at a maximum interval of 1 h. Measurement
38、s shall be made in accordance with IEC 61300-3-3. At the completion of the test, allow the specimen to remain in the chamber while the temperature is gradually reduced to standard atmospheric conditions. EN 61300-2-26:2007 6 5.5 Recovery Allow the specimen to remain under standard test conditions fo
39、r 2 h, as defined in IEC 61300-1, unless otherwise specified in the relevant specification. Clean the specimen in accordance with the manufacturers instructions. 5.6 Final measurements On completion of the test, remove all fixtures and make final measurements, as defined by the relevant specificatio
40、n, to ensure that there is no permanent damage to the specimen. The results of the final measurement shall be within the limit established in the relevant specification. As a minimum, the samples shall be visually examined in accordance with IEC 61300-3-1 for the presence of corrosion and material d
41、egradation, and shall be functionally tested. 6 Severity The severity consists of the duration of exposure. The severity shall be specified in the relevant specification. The following preferred severities are non-mandatory severities, which may be specified for this procedure: Temperature: (35 2) C
42、 Salt concentration: (5 1) % pH: between 6,5 and 7,2 Humidity: at least 85 % Duration h 16 24 48 96 168 336 672 7 Details to be specified The following details, as applicable, shall be specified in the relevant specification: duration; mist density; specimen optically functioning or non-functioning;
43、 pre-conditioning procedure; recovery procedure; initial examinations and measurements and performance requirements; EN 61300-2-26:2007 7 examinations and measurements during test and performance requirements; final examinations and measurements and performance requirements; deviations from test pro
44、cedure; additional pass/fail criteria. EN 61300-2-26:2007 8 Bibliography IEC 61300-3-4, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-4: Examinations and measurements Attenuation _ EN 61300-2-26:2007 9 NOTE Harmonized as EN 61300-3-4:2001 (no
45、t modified). Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references,
46、 the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60068-2-11 -1)Environmental testing - Part 2: Tes
47、ts - Test Ka: Salt mist EN 60068-2-11 19992)IEC 61300-1 -1)Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 1: General and guidance EN 61300-1 20032)IEC 61300-3-1 -1)Fibre optic interconnecting devices and passive components - Basic test and m
48、easurement procedures - Part 3-1: Examinations and measurements - Visual examination EN 61300-3-1 20052)IEC 61300-3-3 -1)Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-3: Examinations and measurements - Active monitoring of changes in atte
49、nuation and return loss EN 61300-3-3 20032)1)Undated reference. 2)Valid edition at date of issue. EN 61300-2-26:2007 10 blankBS EN BSI389 Chiswick High RoadLondonW4 4AL61300-2-26:2007BSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.Revis
