DIN ISO 9022-20-2015 Optics and photonics - Environmental test methods - Part 20 Humid atmosphere containing sulfur dioxide or hydrogen sulfide (ISO 9022-20 2015)《光学和光子学 环境试验方法 第20.pdf

1、June 2015Translation by DIN-Sprachendienst.English price group 8No 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 37.

2、020!%C;q“2322478www.din.deDDIN ISO 9022-20Optics and photonics Environmental test methods Part 20: Humid atmosphere containing sulfur dioxide or hydrogensulfide (ISO 9022-20:2015),English translation of DIN ISO 9022-20:2015-06Optik und Photonik Umweltprfverfahren Teil 20: Schwefeldioxid- oder schwef

3、elwasserstoffhaltige feuchte Atmosphre(ISO 9022-20:2015),Englische bersetzung von DIN ISO 9022-20:2015-06Optique et photonique Mthodes dessais denvironnement Partie 20: Atmosphre humide contenant du dioxyde de soufre ou de lhydrogne sulfur(ISO 9022-20:2015),Traduction anglaise de DIN ISO 9022-20:201

4、5-06SupersedesDIN ISO 9022-20:2001-05www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 11 pages05.15 2DIN ISO 9022-20:2015-06A comma is used as the decimal marker. Contents Page National foreword .3 National Annex NA (informative) Bibliog

5、raphy .4 Introduction .5 1 Scope .6 2 Normative references .6 3 General requirements.6 4 Conditioning6 4.1 Conditioning method 41: Humid atmosphere containing sulfur dioxide (SO2) .7 4.2 Conditioning method 42: Humid atmosphere containing hydrogen sulfide (H2S) 7 5 Procedure 7 5.1 General 7 5.2 Prec

6、onditioning 7 6 Environmental test code 7 7 Specification .8 Annex A (informative) Explanatory notes 9 Bibliography 11 National foreword This document (ISO 9022-20:2015) has been prepared by Technical Committee ISO/TC 172 “Optics and photonics”, Subcommittee SC 1 “Fundamental standards” (Secretariat

7、: DIN, Germany). The responsible German body involved in its preparation was the DIN-Normenausschuss Feinmechanik und Optik (DIN Standards Committee Optics and Precision Mechanics), Working Committee NA 027-01-02 AA Grundnormen der Optik, Working Group NA 027-01-02-03 AK Umweltbedingungen und -prfun

8、gen fr optische Gerte. DIN ISO 9022 consists of the following parts, under the general title Optics and photonics Environmental test methods: Part 1: Definitions, extent of testing Part 2: Cold, heat and humidity Part 3: Mechanical stress Part 4: Salt mist Part 6: Dust Part 7: Resistance to drip or

9、rain Part 8: High internal pressure, low internal pressure, immersion Part 9: Solar radiation and weathering Part 11: Mould growth Part 12: Contamination Part 14: Dew, hoarfrost, ice Part 17: Combined contamination, solar radiation Part 20: Humid atmosphere containing sulfur dioxide or hydrogen sulf

10、ide Part 22: Combined cold, dry heat or temperature change with bump or random vibration Part 23: Low pressure combined with cold, ambient temperature and dry and damp heat The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 9022-1 DIN ISO

11、9022-1 Amendments This standard differs from DIN ISO 9022-20:2001-05 as follows: a) the standard has been editorially updated; b) the text of International Standard ISO 9022-20:2015 has been adopted in its entirety. Previous editions DIN 58390-20: 1993-06 DIN ISO 9022-20: 2001-05 3DIN ISO 9022-20:20

12、15-06National Annex NA (informative) Bibliography DIN ISO 9022-1, Optics and photonics Environmental test methods Part 1: Definitions, extent of testing 4DIN ISO 9022-20:2015-06Optics and photonics Environmental test methods Part 20: Humid atmosphere containing sulfurdioxide or hydrogen sulfide Intr

13、oductionOptical instruments are affected during their use by a number of different environmental parameters which they are required to resist without signification reduction in performance and to remain within defined specifications.The type and severity of these parameters depend on the conditions

14、of use of the instrument (for example, in the laboratory or workshop) and on its geographical location. The environmental effects on optical instrument performance in the tropics and subtropics are totally different from those found when they are used in arctic regions. Individual parameters cause a

15、 variety of different and overlapping effects on instrument performance.The manufacturer attempts to ensure, and the user naturally expects, that instruments will resist the likely rigours of their environment throughout their life. This expectation can be assessed by exposure of the instrument to a

16、 range of simulated environmental parameters under controlled laboratory conditions. The severity of these conditions is often increased to obtain meaningful results in a relatively short period of time.In order to allow assessment and comparison of the response of optical instruments to appropriate

17、 environmental conditions, ISO 9022 contains details of a number of laboratory tests which reliably simulate a variety of different environments. The tests are based largely on IEC standards, modified where necessary to take into account features special to optical instruments.As a result of continu

18、ous progress in all fields, optical instruments are no longer only precision-engineered optical products, but, depending on their range of application, also contain additional assemblies from other fields. For this reason, the principal function of the instrument is to be assessed to determine which

19、 International Standard should be used for testing. If the optical function is of primary importance, then ISO 9022 is applicable, but if other functions take precedence then the appropriate International Standard in the field concerned should be applied. Cases can arise where application of both IS

20、O 9022 and other appropriate International Standards will be necessary.5DIN ISO 9022-20:2015-061 ScopeThis part of ISO 9022 specifies the methods relating to the environmental tests of optical instruments including additional assemblies from other fields (e.g. mechanical, chemical, and electronic de

21、vices), under equivalent conditions, for their ability to resist the influence of sulfur dioxide (SO2) or hydrogen sulfide (H2S) in a humid atmosphere.The purpose of the testing is to investigate to what extent optical, climatic, mechanical, chemical, and electrical performance characteristics of th

22、e specimen are affected by sulfur dioxide or hydrogen sulfide.This part of ISO 9022 is not applicable to the testing of material and surface coatings for their corrosion resistance using high concentrations of sulfur dioxide, for which representative samples are generally used as specimens. The appr

23、opriate material standards apply to tests of this type.2 Normative referencesThe 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 e

24、dition of the referenced document (including any amendments) applies.ISO 9022-1, Optics and photonics Environmental test methods Part 1: Definitions, extent of testing3 General requirementsThe sulfur dioxide and the hydrogen sulfide used as the test gases shall be chemically pure, taken from commerc

25、ially available compressed gas cylinders. A suitable test facility is described in Annex A. The test specimen shall not be exposed to direct sunlight during conditioning. No condensation shall be produced in the test chamber or on the specimen itself during conditioning. Prior to insertion into the

26、test chamber, the test specimen shall therefore be heated to 2 K or 3 K above the temperature of the test chamber which has already been set to the test temperature. If several specimens are to be tested at the same time, they shall not touch each other or the walls of the test chamber. The total vo

27、lume of the specimens shall not be more than 50 % of the volume of the test chamber (exposure zone). The required conditioning values shall be attained by the test specimen(s) within 2 h after commencement of the test. The test shall not be interrupted during the required exposure time.When the test

28、 gases are changed, the test gas last used shall be exhausted in its entirety from the test chamber. No materials which absorb sulfur dioxide or hydrogen sulfide shall be used in the test chamber.4 ConditioningThe required exposure time shall begin as soon as the required conditioning values have be

29、en attained in the test chamber.6DIN ISO 9022-20:2015-064.1 Conditioning method 41: Humid atmosphere containing sulfur dioxide (SO2)See Table 1.Table 1 Degrees of severity for conditioning method 41: Humid atmosphere containing sulfur dioxide (SO2)Degree of severity 01 02 03 04 05 06 07 08SO2content

30、 of test atmosphere, cm3/m31 to 2 20 to 30 10 to 15Test chamber temperature, C 25 2 35 2Relative humidity, % 70 to 80Exposure time, days 21 56 4 10 21 1 4 10State of operation 1 or 2aaMainly for checking electrical functional safety.4.2 Conditioning method 42: Humid atmosphere containing hydrogen su

31、lfide (H2S)See Table 2.Table 2 Degrees of severity for conditioning method 42: Humid atmosphere containing hydrogen sulfide (H2S)Degree of severity 01 02 03 04 05 06 07 08 09H2S content of test atmosphere, cm3/m30,5 to 1 10 to 15 4 to 6Test chamber temperature, C 25 2 35 2Relative humidity, % 70 to

32、80Exposure time, days 21 56 1 4 10 21 1 4 10State of operation 1 or 2aaMainly for checking electrical functional safety.5 Procedure5.1 GeneralThe test shall be conducted in accordance with the requirements of the relevant specification and with ISO 9022-1.5.2 PreconditioningIf not specified in the r

33、elevant specification, the greasing of areas at risk of corrosion as stipulated in ISO 9022-1 shall not be required.6 Environmental test codeThe environmental test code shall be as defined in ISO 9022-1, giving a reference to ISO 9022 and the codes for the conditioning method chosen, the degree of s

34、everity and the state of operation.EXAMPLE The environmental test of optical instruments for their resistance to sulfur dioxide in a humid atmosphere, in accordance with conditioning method 41, degree of severity 02, state of operation 1, is identified as:Environmental test ISO 9022-41-02-17DIN ISO

35、9022-20:2015-067 SpecificationThe relevant specification shall contain the following details:a) environmental test code;b) number of specimens;c) preconditioning;d) type and scope of initial test;e) period of operation for state of operation 2;f) type and scope of intermediate test for state of oper

36、ation 2;g) recovery;h) type and scope of final test;i) criteria for evaluation;j) type and scope of test report.8DIN ISO 9022-20:2015-06Annex A (informative) Explanatory notesA.1 GeneralMany standards recommend the exclusive use of representative samples to test the resistance of materials and coati

37、ngs to humid atmospheres containing sulfur dioxide or hydrogen sulfide. Moreover, 40 C, 100 % relative humidity and, for example, a sulfur dioxide concentration of 200 mg/m3to 300 mg/m3are stipulated for the corrosive atmosphere. Exposure to such extreme conditions is totally unsuitable for complete

38、 optical instruments or optical assemblies and is extremely unlikely in natural environmental conditions. It does not even bear any relation to the behaviour of operative instruments or assemblies and is an extremely polluted atmosphere in natural environmental conditions. IEC 721-3-4 defines the ma

39、ximum content of sulfur dioxide in the highly polluted atmosphere surrounding industrial facilities emitting chemical substances to be 40 mg/m3(15 cm3/m3).If the values mentioned above as defined in IEC 721-3-4 are used for the test and the severity of conditioning is increased to obtain the necessa

40、ry acceleration, the degrees of conditioning severity by conditioning method 41 are obtained and can be related to natural environmental conditions. Agreement with the test values stipulated by IEC 60068-2-42 would be closely matched.The experience gained in practice with IEC 60068-2-42 for electron

41、ic products can also be applied to a large extent to optical instruments.A.2 Test facilityThe test facility shown in Figure A.1 is recommended for conditioning of optical instruments or assemblies in a humid atmosphere containing sulfur dioxide or hydrogen sulfide.The atmosphere in the test chamber

42、shall be replaced two to four times an hour. The sulfur dioxide or hydrogen sulfide concentration in the test atmosphere shall be kept constant using the baffle plates shown in Figure A.1 or by a ventilator rotating at approximately 60 min-1. When testing complete instruments, it is better for the t

43、est atmosphere to enter at the top and exit at the bottom of the exposure zone, contrary to that shown in Figure A.1.Contrary to the schematic drawing in Figure A.1, it is also possible to install a test facility without its own air-conditioning system inside a climatic test chamber. Contamination w

44、ith the test gas is carried out inside the intake connection of the test facility, through which the air-conditioned atmosphere is sucked out of the climatic test chamber. The volume of such a test facility shall be not more than 30 % of the volume of the climatic test chamber.9DIN ISO 9022-20:2015-

45、06Key1 suction pump and freezing trap 8 gas supply2 air flow meter 9 dosing pump3 gas wash bottle and/or adsorbent 10 air-conditioning plant4 insulation 11 corrosive gas injector5 heating and/or cooling device 12 fresh air filter6 baffle plates 13 exposure zone7 pressure-reducing valveFigure A.1 Sch

46、ematic representation of a test apparatus10DIN ISO 9022-20:2015-06Bibliography1 IEC 721-3-4:1995, Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 4: Stationary use at non-weatherprotected locations2 IEC 60068-2-42:2003, Environmental testing Part 2-42: Tests; Test Kc: Sulphur dioxide test for contacts and connections11DIN ISO 9022-20:2015-06