प ल प ज पन/DOCUMENT DESPATCH ADVICE र भ /Ref. प ड 22/( 11023) डबल PGD 22/( 11023) W

Transcription

1 व प पर लन DRAFTS IN WIDE CIRCULATION प ल प ज पन/DOCUMENT DESPATCH ADVICE र भ /Ref. प ड 22/( 11023) डबल PGD 22/( 11023) W द न /Date न म म /TECHNICAL COMMITTEE: म प ए पस म म म प ड 22 Educational Instruments and Equipment Sectional Committee, PGD 22 र स /To all Members of : 1. ) त प न ए न मन म र पर / Production & General Engineering Division Council ) म प ए पस म म म प ड 22 / Educational Instruments and Equipment Sectional Committee, PGD म न ल न स /Other Interested Members Dear Sir(s), प म प ए पस म म म प ड 22 द द ए ए मनम मलम लग प ल प प /Please find enclosed the following document prepared by the Educational Instruments and Equipment Sectional Committee, PGD 22 प ल ख /DOC NO. श र षक /TITLE प ज ड /PGD प क शशक एव फ ट न क स पर षवरण पर क ण तर क स र क त सर, 22(11023)W/ IS XXXX/ ISO :2012 स ख गर र त पर पररवतष क स थ बम प र र द च छ क क प Optics and photonics Environmental test methods Part 22: Combined cold, dry heat or temperature change with bump or random vibration (adoption of ISO :2012, ICS ) प प ल ल न पन म म ब ह ए र द : द न प प म ए न प ल न प व ब क र न

2 /Kindly examine the draft amendment to standards and forward your views stating any difficulties which you are likely to experience in your business or profession, if these are finally adopted as National Standards. म म र न म म म /Last date for comments: द प म म प द प प द स प क प प र /Comments, if any, may please be made in the format as given in overleaf and mailed to the undersigned at the above address. द प म म प प न ल म प म म प प प क प स र न म प म ग न प म न ल न न म प द न म म प प ब म म म ध प भ पश र न म प प र म ग म द ए ए न च न श भ म म म म भ र ए /In case, no comments are received or comments received are of editorial nature, you will kindly permit us to presume your approval for the above documents as finalised for adoption as Indian Standards. However, in case of comments of technical in nature are received then it may be finalized either in consultation with the Chairman, Sectional Committee or referred to the Sectional Committee. धन र व र /Thanking you, लग /Encls.: उपर क त/As above. भवर र /Yours faithfully, (Ranga Rajan) प र ख/ Head (प ज ड /PGD)

3 FORMAT FOR SENDING COMMENTS ON BIS DOCUMENTS (Please use A4 size sheet of paper only and type within fields indicated. Comments on each clauses/sub-clauses/table/fig. etc be started on a fresh box. Information in Column 4 should include reasons for the comments and suggestions for modified wording of the clauses when the existing text is found not acceptable. Adherence to this format facilitates Secretariat s work) Doc No प ज ड /PGD 22(11023)W/ IS xxxxx/iso : 2012 Title Optics and photonics Environmental test methods Part 22 : Combined cold, dry heat or temperature change with bump or random vibration (adoption of ISO :2012, ICS ) LAST DATE OF COMMENTS: NAME OF THE COMMENTATOR/ORGANIZATION: Sl. No. Clause/Subclause/ para/table/fig. No. commented Commentator/ Organization/ Abbreviation Type of Comments (General/Editorial/ Technical) Justification Proposed change For Bureau s Use

4 For Comments only Doc. No. PG 22(11023)W IS XXXX : XXXX ISO : 2012 Nov 2016 Optics and photonics Environmental test methods Combined cold, dry heat or temperature change with bump or random vibration (Adoption of ISO : 2012, ICS ) Not to be reproduced without permission Last date for receipt of comment of BIS or used as Standard is NATIONAL FOREWORD This Draft Indian Standard which is identical with ISO : 2012 Optics and photonics Environmental test methods Combined cold, dry heat or temperature change with bump or random vibration issued by the International Organization for Standardization (ISO) will be adopted by the Bureau of Indian Standards on the recommendation of the Educational Instruments and Equipment Sectional Committee and approval of the Production and General Engineering Division Council. This standard is taken up for adoption to align with ISO where ISO has formulated ISO : 2012 which superseded the following standards: 1. ISO Optics and Optical Instruments Environmental Test Methods Combined Shock Bump or Free Fall and Dry Heat or Cold 2. ISO Optics and Optical Instruments Environmental Test Methods Combined Digitally Controlled Broadband Random Vibration and Dry Heat or Cold 3. ISO Optics and Optical Instruments Environmental Test Methods Combined Sinusoidal Vibration and Dry Heat or Cold and 4. ISO Optics and Optical Instruments Environmental Test Methods Combined Bounce or SteadyState Acceleration and Dry Heat or Cold Accordingly, this standard supersedes IS : 2000, IS : 2000, IS : 2000 and IS : Optical and photonic instruments, including additional assemblies from other fields (e.g. mechanical, chemical and electronic devices) are affected during their use by a number of different environmental and handling parameters which they are required to resist without significant reduction in performance, while still remaining 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

5 effects on optical instrument performance in tropical and subtropical climates are totally different from those found when they are used in the 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 instruments will resist the likely rigours of their environment throughout their life. This expectation can be assessed by cumulated exposure of the instrument to a range of simulated environmental parameters under controlled laboratory conditions. The cumulative combination, degree of severity and sequence of these conditions can be selected 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 environmental conditions, this series contains details of a number of laboratory tests which reliably simulate a variety of different environments. It should be noted that, 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, also contain additional assemblies from other fields. For this reason, the principal function of the instrument must be assessed to determine which this standard should be used for testing. If the optical function is of primary importance, then the appropriate standard is applicable, but if other functions take precedence, then the appropriate this standard in the field concerned should be applied. Cases may arise where application of combination of standards is necessary. The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are however not identical to those used in Indian Standards. Attention is particularly drawn to the following a) Wherever the words International Standard appear referring to this standard, they should be read as Indian Standard. b) Comma (,) has been used as a decimal marker while in Indian Standards, the currentpractice is to use a point (.) as the decimal marker. The technical committee responsible for the preparation of this standard has reviewed the provisions of the below mentioned international standard and has decided that they are acceptable for use in conjunction with this standard: International Standard ISO Optics and photonics Environmental test methods Part 1: Definitions, extent of testing ISO Optics and optical instruments Environmental test methods Part 2: Cold, heat and humidity ISO Optics and optical instruments Environmental test methods Part 3: Mechanical stress Title

6 IEC IEC Environmental testing Part 2-47: Tests Mounting of specimens for vibration, impact and similar dynamic tests Environmental testing Part 2-64: Tests Test Fh: Vibration, broadband random and guidance Explanatory notes given in Annex A are for information only. In reporting the result of a test or analysis made in accordance with this standard, is to be rounded off, it shall be done in accordance with IS 2 : 1960 Rules for rounding off numericalvalues (revised).

7 For complete text please refer to ISO : If anyone requires a copy of the same please contact the undersigned. Shri Renga Rajan Sc-E & Head (PGD), PGD, ROOM NO: 355 MANAK BHAVAN 9 BHADURSHAH ZAFAR MARG NEW DELHI TELEFAX pgd@bis.gov.in