1、BSI Standards Publication BS ISO 9022-6:2015 Optics and photonics Environmental test methods Part 6: DustBS ISO 9022-6:2015 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 9022-6:2015. It supersedes BS ISO 9022-6:1994 which is withdrawn. The UK participation
2、in its preparation was entrusted to Technical Committee CPW/172, Optics and Photonics. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for
3、 its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015 ISBN 978 0 580 87918 0 ICS 37.020 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Polic
4、y and Strategy Committee on 31 March 2015. Amendments issued since publication Date T e x t a f f e c t e dBS ISO 9022-6:2015 ISO 2015 Optics and photonics Environmental test methods Part 6: Dust Optique et photonique Mthodes dessais denvironnement Partie 6: Poussire INTERNATIONAL STANDARD ISO 9022-
5、6 Second edition 2015-03-01 Reference number ISO 9022-6:2015(E)BS ISO 9022-6:2015ISO 9022-6:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or
6、 by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-
7、1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in SwitzerlandBS ISO 9022-6:2015ISO 9022-6:2015(E)Foreword iv Introduction vi 1 Scope . 1 2 Normative references 1 3 General information and test conditions 1 4 Conditioning method 52: Blowi
8、ng dust 3 5 Procedure. 3 5.1 General . 3 5.2 Preconditioning 3 5.3 Recovery . 4 6 Environmental test code . 4 7 Specification 4 ISO 2015 All rights reserved iii Contents PageBS ISO 9022-6:2015ISO 9022-6:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federati
9、on of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee
10、. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and th
11、ose intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2
12、(see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the d
13、ocument will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms
14、 and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 172, Optics and photonics, S
15、ubcommittee SC 1, Fundamental standards. This second edition cancels and replaces the first edition (ISO 9022-6:1994), of which it constitutes a minor revision. ISO 9022 consists of the following parts, under the general title Optics and photonics Environmental test methods: Part 1: Definitions, ext
16、ent 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: Contamination Part 14: Dew
17、, hoarfrost, ice Part 17: Combined contamination, solar radiation Part 20: Humid atmosphere containing sulfur dioxide or hydrogen sulfideiv ISO 2015 All rights reservedBS ISO 9022-6:2015ISO 9022-6:2015(E) Part 22: Combined cold, dry heat or temperature change with bump or random vibration Part 23: L
18、ow pressure combined with cold, ambient temperature and dry and damp heat ISO 2015 All rights reserved vBS ISO 9022-6:2015ISO 9022-6:2015(E) Introduction Optical instruments are affected during their use by a number of different environmental parameters which they are required to resist without sign
19、ificant reduction in performance and to remain within defined specifications. The type and severity of these parameters depend on the conditions of use of the instrument (for example, in the laboratory or workshop) and on its geographical location. The environmental effects on optical instrument per
20、formance in the tropics and subtropics are totally different from those found when they are used in arctic regions. Individual parameters cause a variety of different and overlapping effects on instrument performance. The manufacturer attempts to ensure, and the user naturally expects, that instrume
21、nts will resist the likely rigours of their environment throughout their life. This expectation can be assessed by exposure of the instrument to a range of simulated environmental parameters under controlled laboratory conditions. The severity of these conditions is often increased to obtain meaning
22、ful results in a relatively short period of time. In order to allow assessment and comparison of the response of optical instruments to appropriate environmental conditions, ISO 9022 contains details of a number of laboratory tests which reliably simulate a variety of different environments. The tes
23、ts are based largely on IEC standards, modified where necessary to take into account features special to optical instruments. As a result of continuous progress in all fields, optical instruments are no longer only precision- engineered optical products, but, depending on their range of application,
24、 also contain additional assemblies from other fields. For this reason, the principal function of the instrument is to be assessed to determine which International Standard should be used for testing. If the optical function is of primary importance, then ISO 9022 is applicable, but if other functio
25、ns take precedence, then the appropriate International Standard in the field concerned should be applied. Cases can arise where application of both ISO 9022 and other appropriate International Standards will be necessary.vi ISO 2015 All rights reservedBS ISO 9022-6:2015Optics and photonics Environme
26、ntal test methods Part 6: Dust 1 Scope This 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 devices), under equivalent conditions, for their ability to resis
27、t the influence of blowing dust. The purpose of testing is to investigate to what extent the optical, climatic, mechanical, chemical, and electrical (including electrostatic) performance characteristics of the specimen are affected by blowing dust, especially with a view to malfunctions of moving pa
28、rts (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 coarse dust. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document
29、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. ISO 565, Test sieves Metal wire cloth, perforated metal plate and electroformed sheet Nominal siz
30、es of openings ISO 9022-1, Optics and photonics Environmental test methods Part 1: Definitions, extent of testing 3 General information and test conditions During exposure, optical surfaces shall be protected from dust by any means of covering, such as dust caps. The type of covering to be used shal
31、l 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 test chamber shall be sufficiently large to ensure that the specimen occupies no more than 50 % of the cross-sectional ar
32、ea (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 particles not less than 97 % (m/m) silicon dioxide (SiO 2 ). The particle size distribution and the wire mesh sieve
33、required for the analysis shall be in accordance with Table 1. INTERNATIONAL ST ANDARD ISO 9022-6:2015(E) ISO 2015 All rights reserved 1BS ISO 9022-6:2015ISO 9022-6:2015(E) Key 1 dust feeder, including metering and dehumidifying devices 11 floor grating 2 fan 12 dust evacuation 3 flow straighteners
34、13 feedback 4 temperature sensor 14 photoelectric dust concentration meter 5 heating element 15 test chamber door 6 hygrometer 16 fan motor 7 air velocity controlling throttles 17 standard light source 8 photoelectric dust concentration meter 18 temperature sensor 9 dehumidification (cooling) 19 tes
35、t chamber 10 test chamber F i g u r e 1 E x a m p l e o f t e s t a p p a r a t u s c o n f i g u r a t i o n (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 t
36、o be tested simultaneously, 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 specim
37、en may be reoriented 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.2 ISO 2015 All rig
38、hts reservedBS ISO 9022-6:2015ISO 9022-6:2015(E) Table 1 Dust particle size distribution and wire mesh sieves Fine dust particle size distribution % (m/m) 2 % Particle size mm Test sieve in accordance with ISO 565 m from to 2 0,1 0,14 140 8 0,071 0,1 100 15 0,045 0,071 71 75 0,045 45 4 Conditioning
39、method 52: Blowing dust See Table 2. Table 2 Degrees of severity for conditioning method 52: Blowing dust Step Parameter Unit Degree of severity 01 02 a 03 b 1 Temperature C 18 to 28 18 to 28 18 to 28 Relative humidity % 25 25 25 Air velocity m/s 8 to 10 8 to 10 8 to 10 Sand concentration g/m 3 5 to
40、 15 5 to 15 5 to 15 Exposure time h 6 6 6 2 c Temperature C Not applicable Not applicable 55 to 65 Relative humidity % 25 Air velocity m/s 1 to 3 Exposure time h 16 3 Temperature C Not applicable 35 to 45 55 to 65 Relative humidity % 25 25 Air velocity m/s 8 to 10 8 to 10 Sand concentration g/m 3 5
41、to 15 5 to 15 Exposure time h 6 6 State of operation 1 or 2 aSteps 1 and 3 shall follow one another immediately. bSteps 1 to 3 shall follow one another immediately. cSand feed discontinued. 5 Procedure 5.1 General The test shall be conducted in accordance with the requirements of the relevant specif
42、ication and with ISO 9022-1. 5.2 Preconditioning In the absence of provisions in the relevant specification for preconditioning, the specimen shall be clean and dry. ISO 2015 All rights reserved 3BS ISO 9022-6:2015ISO 9022-6:2015(E) 5.3 Recovery Unless otherwise specified in the relevant specificati
43、on, 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 specimen. Do not remove dust from specimens by either air-blast or vacuum cleaning. 6 Environmental test code The environmental test code sh
44、all 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 operation. EXAMPLE The environmental test of optical instruments for resistance to blowing dust, conditioning method 52, degree of severity 01, st
45、ate of operation 2, is identified as:Environmental test ISO 9022-52-01-2 7 Specification The relevant specification shall contain the following details: a) environmental test code; b) number of specimens; c) optical surfaces to be exposed unprotected; d) position and number of specimen surfaces to b
46、e 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 a
47、nd scope of final test; k) criteria for evaluation; l) type and scope of test report.4 ISO 2015 All rights reservedBS ISO 9022-6:2015BS ISO 9022-6:2015ISO 9022-6:2015(E) ISO 2015 All rights reserved IC S 37.020 Price based on 4 pagesThis page deliberately left blankBSI is the national body responsib
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