1、August 2015 Translation by DIN-Sprachendienst.English price group 7No 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
2、37.020!%DF“2333588www.din.deDDIN ISO 9022-6Optics and photonics Environmental test methods Part 6: Dust (ISO 9022-6:2015),English translation of DIN ISO 9022-6:2015-08Optik und Photonik Umweltprfverfahren Teil 6: Staub (ISO 9022-6:2015),Englische bersetzung von DIN ISO 9022-6:2015-08Optique et photo
3、nique Mthodes dessais denvironnement Partie 6: Poussire (ISO 9022-6:2015),Traduction anglaise de DIN ISO 9022-6:2015-08SupersedesDIN ISO 9022-6:1999-05www.beuth.deDocument comprises 9 pagesIn case of doubt, the German-language original shall be considered authoritative.07.15 A comma is used as the d
4、ecimal marker. National foreword 3Introduction .51 Scope . 62 Normative references 63 General information and test conditions 64 Conditioning method 52: Blowing dust 85 Procedure.85.1 General . 85.2 Preconditioning 85.3 Recovery . 96 Environmental test code . 97 Specification 9Contents PageNational
5、Annex NA (informative) Bibliography4DIN ISO 9022-6:2015-08 2 National foreword This document (ISO 9022-6:2015) has been prepared by Technical Committee ISO/TC 172 “Optics and photonics”, Subcommittee SC 1 “Fundamental standards” (Secretariat: DIN, Germany). The responsible German body involved in it
6、s 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 -prfungen fr optische Gerte. Attention is drawn to the possibilit
7、y that some of the elements of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such patent rights. DIN ISO 9022 consists of the following parts, under the general title Optics and photonics Environmental test methods: Part 1:
8、 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 rain Part 8: High internal pressure, low internal pressure, immersion Part 9: Solar radiation and weathering Part 11: Mould growth Part 12: Contamina
9、tion Part 14: Dew, hoarfrost, ice Part 17: Combined contamination, solar radiation Part 20: Humid atmosphere containing sulfur dioxide or hydrogen sulfide Part 22: Combined cold, dry heat or temperature change with bump or random vibration Part 23: Low pressure combined with cold, ambient temperatur
10、e and dry and damp heat The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 565 DIN ISO 565 ISO 9022-1 DIN ISO 9022-1 Amendments This standard differs from DIN ISO 9022-6:1999-05 as follows: a) normative references have been updated; b) the
11、 standard has been editorially updated; c) the text of International Standard ISO 9022-6:2015 has been adopted in its entirety. Previous editions DIN 58390-6: 1976-05, 1985-02 DIN ISO 9022-6: 1999-05 DIN ISO 9022-6:2015-08 3 National Annex NA (informative) Bibliography DIN ISO 565, Test sieves Metal
12、 wire cloth, perforated metal plate and electroformed sheet Nominal sizes of openings DIN ISO 9022-1, Optics and photonics Environmental test methods Part 1: Definitions, extent of testing DIN ISO 10109, Optics and photonics Guidance for the selection of environmental tests DIN ISO 9022-6:2015-08 4
13、IntroductionOptical instruments are affected during their use by a number of different environmental parameters which they are required to resist without significant reduction in performance and to remain within defined specifications.The type and severity of these parameters depend on the condition
14、s 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
15、 a 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
16、 a 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 appropria
17、te 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 conti
18、nuous 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 whi
19、ch 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
20、 ISO 9022 and other appropriate International Standards will be necessary.Optics and photonics Environmental test methods Part 6: DustDIN ISO 9022-6:2015-08 5 1 ScopeThis part of ISO 9022 specifies the methods relating to the environmental tests of optical instruments including additional assemblies
21、 from other fields (e.g. mechanical, chemical, and electronic devices), under equivalent conditions, for their ability to resist the influence of blowing dust.The purpose of testing is to investigate to what extent the optical, climatic, mechanical, chemical, and electrical (including electrostatic)
22、 performance characteristics of the specimen are affected by blowing dust, especially with a view to malfunctions of moving parts (such as sliding surfaces, bearings, contacts, operating controls, gears) or unacceptable wear of surfaces.This test is not intended to determine the wear resistance to c
23、oarse dust.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 edition of the referenced document (including
24、 any amendments) applies.ISO 565, Test sieves Metal wire cloth, perforated metal plate and electroformed sheet Nominal sizes of openingsISO 9022-1, Optics and photonics Environmental test methods Part 1: Definitions, extent of testing3 General information and test conditionsDuring exposure, optical
25、surfaces shall be protected from dust by any means of covering, such as dust caps. The type of covering to be used shall be specified in the relevant specification. If the specimen is to be exposed without the optical surfaces being covered, this shall be stated in the relevant specification.The tes
26、t chamber shall be sufficiently large to ensure that the specimen occupies no more than 50 % of the cross-sectional area (normal to the air flow) and 50 % of the useful volume of the test chamber.Figure 1 shows an example of a test chamber configuration.The mineral dust shall consist of sharp-edged
27、particles not less than 97 % (m/m) silicon dioxide (SiO2). The particle size distribution and the wire mesh sieve required for the analysis shall be in accordance with Table 1.DIN ISO 9022-6:2015-08 6 Key1 dust feeder, including metering and dehumidifying devices11 floor grating2 fan 12 dust evacuat
28、ion3 flow straighteners 13 feedback4 temperature sensor 14 photoelectric dust concentration meter5 heating element 15 test chamber door6 hygrometer 16 fan motor7 air velocity controlling throttles 17 standard light source8 photoelectric dust concentration meter 18 temperature sensor9 dehumidificatio
29、n (cooling) 19 test chamber10 test chamber Figure 1 Example of test apparatus configuration (schematic view)Each exposure shall be run with fresh dust. The specimen shall be placed as near to the centre of the test chamber as possible. In the event that more than one specimen is to be tested simulta
30、neously, they shall be arranged at right angles to the air flow at a distance of not less than 100 mm from each other and from the test chamber walls. The specimen shall be positioned in such a way that the most vulnerable surfaces face the blowing dust. The position of the specimen may be reoriente
31、d during exposure in order to expose different surfaces to the air flow. The position and number of surfaces to be exposed to the air flow shall be specified in the relevant specification. Allot equal portions of the exposure period to each surface to be exposed.DIN ISO 9022-6:2015-08 7 Table 1 Dust
32、 particle size distribution and wire mesh sievesFine dust particle size distribution % (m/m)2 %Particle sizemmTest sieve in accordance with ISO 565mfrom to2 0,1 0,14 1408 0,071 0,1 10015 0,045 0,071 7175 0,045 454 Conditioning method 52: Blowing dustSee Table 2.Table 2 Degrees of severity for condit
33、ioning method 52: Blowing dustStep Parameter UnitDegree of severity01 02a03b1Temperature C 18 to 28 18 to 28 18 to 28Relative humidity % 25 25 25Air velocity m/s 8 to 10 8 to 10 8 to 10Sand concentration g/m35 to 15 5 to 15 5 to 15Exposure time h 6 6 62cTemperature CNot applicable Not applicable55 t
34、o 65Relative humidity % 25Air velocity m/s 1 to 3Exposure time h 163Temperature CNot applicable35 to 45 55 to 65Relative humidity % 25 25Air velocity m/s 8 to 10 8 to 10Sand concentration g/m35 to 15 5 to 15Exposure time h 6 6State of operation 1 or 2aSteps 1 and 3 shall follow one another immediate
35、ly.bSteps 1 to 3 shall follow one another immediately.cSand feed discontinued.5 Procedure5.1 GeneralThe test shall be conducted in accordance with the requirements of the relevant specification and with ISO 9022-1.5.2 PreconditioningIn the absence of provisions in the relevant specification for prec
36、onditioning, the specimen shall be clean and dry.DIN ISO 9022-6:2015-08 8 5.3 RecoveryUnless otherwise specified in the relevant specification, the accumulated dust shall be removed from the specimen by shaking, wiping, or brushing while taking care to avoid introduction of additional dust into the
37、specimen. Do not remove dust from specimens by either air-blast or vacuum cleaning.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 severity, and the state of operatio
38、n.EXAMPLE The environmental test of optical instruments for resistance to blowing dust, conditioning method 52, degree of severity 01, state of operation 2, is identified as:Environmental test ISO 9022-52-01-27 SpecificationThe relevant specification shall contain the following details:a) environmen
39、tal test code;b) number of specimens;c) optical surfaces to be exposed unprotected;d) position and number of specimen surfaces to be exposed to the air flow;e) preconditioning of specimen, if other than as described in 5.2;f) type and scope of initial test;g) period of operation for state of operation 2;h) type and scope of intermediate test for state of operation 2;i) recovery, if other than as described in 5.3;j) type and scope of final test;k) criteria for evaluation;l) type and scope of test report.DIN ISO 9022-6:2015-08 9
