EN 60679-5-1998 en Quartz Crystal Controlled Oscillators of Assessed Quality Part 5 Sectional Specification - Qualification Approval《经质量评定的石英晶体振荡器 第5部分 分规范 合格鉴定 IEC 60679-5-1998》.pdf
《EN 60679-5-1998 en Quartz Crystal Controlled Oscillators of Assessed Quality Part 5 Sectional Specification - Qualification Approval《经质量评定的石英晶体振荡器 第5部分 分规范 合格鉴定 IEC 60679-5-1998》.pdf》由会员分享,可在线阅读,更多相关《EN 60679-5-1998 en Quartz Crystal Controlled Oscillators of Assessed Quality Part 5 Sectional Specification - Qualification Approval《经质量评定的石英晶体振荡器 第5部分 分规范 合格鉴定 IEC 60679-5-1998》.pdf(19页珍藏版)》请在麦多课文档分享上搜索。
1、STDmBSI BS EN bOb79-5-ENGL 1778 E LbZVbb9 0730887 TLi3 BRITISH STANDARD Quartz crystal controlled oscillators of assessed quality - Part 5: Sectional specification - Qualification approval The European Standard EN 606795:1!398 has the status of a British Standard ICs 31.140 NO COPYING WITHOUT BSI PE
2、RMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 60679-5: 1998 IEC 60679-5: 1998 STD-BSI BS EN bUb77-5-ENGL 1778 E 1bZLibbS 0730888 78T M Amd. No. BS EN 60679-61998 Date Text affected National foreword This British Standard is the English language version of EN 606745: 1998. It is identical with
3、IEC 60679451998. It supedes BS EN 169200:1996 which will be withdrawn on 2001-05-l. The UK participaiion in its prepdon was entrusted to Technical Committee EPU49, Piezoelectric devices for frequency control and selection, which has the responsibility to: - aid enquirers to understand the text; - pr
4、esent to the responsible intedonaUEumpean committee any enquiries on the interpretaion, or proposals for change, and keep the UK interests iI-LfOed; - monitor reW intemationai and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtain
5、ed on request to its secretary. Rom 1 January 1997, al IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiem fr
6、om both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to intemationai publications with their corresponding European publications. The British Standards which implement these international or Europea
7、n publications may be found in the BSI Standards Catalogue under the section entite “Internationai Standmis Correspondence Index“, or by using the “Fnd“ faciity of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users
8、 of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This British Standard, having been prepared under the direction of the Electrotechnicai Sector Board, was published under the authority o
9、f the Standards Board and comes into effect on 16 November 1998 Q BSI 1998 Summary of pages This document comprises a knt cover, an inside b) detail specification number, issue number and date; and where applicable; c) nominal frequency expressed in kilohertz (kHz) or megahertz (MHz); d) enclosure t
10、ype; e) frequency tolerance(s) and operating temperature range; f) full description of any additional requirement. 2.2.6 The detail specification may include information which is not normally required to be verified by the inspection procedure, such as circuit diagrams, cuwes, drawings and notes nee
11、ded for clarif ication. Additional information (not for inspection purposes) STD-BSI BS EN bOb79-5-ENGL 1798 Lb24bb7 0730899 183 Page 6 EN 60679-6:1998 3 Quality assessment procedures 3.1 Eligibility for qualification approval Prior to making an application for qualification approval a manufacturer
12、shall first obtain manufacturers inspection approval in accordance with 11.1 of IEC QC 001002. The primary stage of manufacture shall be as defined in 3.1 of IEC 60679-1. 3.2 Structurally similar components Structural similarity exists where a range of quartz crystal controlled oscillators covered b
13、y a single detail specification and having similar electrical characteristics, incorporate the same materials and method of sealing the enclosure. 3.3 Certified test records Certified test records shall comply with 3.12 of IEC 60679-1. They shall be made available when prescribed in the detail speci
14、fication and when requested by the customer. 3.4 Qualification approval The procedures for qualification approval testing are defined in 3.8 of IEC 60679-1. Qualification approval can be obtained either by using a fixed sample drawn from current production (see 3.4.1), or on the basis of lot-by-lot
15、tests on three inspection lots with periodic tests on a sample taken from at least one of these lots (see 3.4.2). 3.4.1 The manufacturer shall produce test evidence to show conformance to the requirements of the test schedule given in table 1 of this specification. Fixed sample size procedure for in
16、itial approval Table 1 gives the number of samples to be tested in each group or subgroup together with the permissible number of defectives for qualification approval tests. If additional groups are introduced into the test schedule the number of specimens required for Group “O“ shall be increased
17、by the same number as that required for the additional groups. The complete series of tests given in table 1 and annex A, which together form the fixed sample size test schedule, are required for the qualification approval of quartz crystal controlled oscillators covered by one detail specification.
18、 The tests in each group shall be carried out in the order given. The whole sample shall be subjected to the tests of Group “O“ and then divided for the other groups. “One defective“ is counted when a quartz crystal controlled oscillator has not satisfied the whole or a part of the tests of a group.
19、 3.4.2 The manufacturer shall produce test evidence to show conformance to the requirements of tables 2 and 3 and the detail specification. Tests in each group shall be carried out in the given order. Lot-by-lot procedure for initial approval STD-BSI BS EN bOb77-5-ENGL 1998 Lb24bbS 0730895 OLT M Pag
20、e 7 EN 60679-5:1998 A minimum of three inspection lots, taken in the shortest possible period, shall be subjected to the tests given in table 2 and at least one sample taken from one of these lots shall be subjected to the periodic tests given in table 3. When additional groups are introduced into t
21、he test schedule the number of specimens shall be increased by the same number as that required for the additional groups. “One defective“ is counted when a quartz crystal controlled oscillator has not satisfied the whole or a part of the tests of a group. 3.4.3 Approval For both procedures 3.4.1 an
22、d 3.4.2 approval may be granted when the number of defectives does not exceed the specified number of permitted defectives for each group or the total number of defectives allowed. The maintenance of approval shall be in accordance with 11.5 of IEC QC 001002. 3.5 Quality conformance inspection Quali
23、ty conformance inspection shall be carried out in accordance with clause 12 of IEC QC O01 002. The blank detail specification shall prescribe the minimum test schedule which shall be included in each detail specification for quality conformance inspection. 3.5.1 Formation of inspection lots a) Group
24、s A and B inspection These tests shall be carried out on a lot-by-lot basis according to table 2 of this specification. The inspection lot shall consist of structurally similar quartz crystal controlled oscillators formed from current production. b) Group C inspection These tests shall be carried ou
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