BS-2011-2.1SA-1977 IEC-60068-2-5-1975.pdf
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1、BRITISH STANDARD BS 2011-2.1Sa: 1977 IEC 68-2-5: 1975 Basic environmental testing procedures Part 2.1: Tests Test Sa: Simulated solar radiation at ground level UDC 621.37/.39.001.4:620.169.1:620.193.6:535.21 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:45:45 GMT+00:00 2006, Uncontrolled
2、 Copy, (c) BSI BS 2011-2.1Sa:1977 This British Standard, having been prepared under the direction of the General Electrotechnical Engineering Standards Committee, was published under the authority of the Executive Board on 31 August 1977 BSI 04-1999 The following BSI references relate to the work on
3、 this standard: Committee reference GEL/15 Draft for approval 76/26540 ISBN 0 580 09952 0 Foreword This British Standard has been prepared under the direction of the General Electrotechnical Engineering Standards Committee. It is identical with IEC Publication 68-2-5:1975 “Basic environmental testin
4、g procedures. Part 2: Tests Test Sa: Simulated solar radiation at ground level”. Conventions. The text of the IEC Publication has been accepted as suitable for publication, without deviation, as a British Standard. Certain conventions are used, however, that are not identical with those used in Brit
5、ish Standards. Attention is therefore drawn to the following. The comma has been used in Table 1 as a decimal marker. In British Standards it is current practice to use a full point (a full stop on the baseline) as the decimal marker. Wherever page numbers are quoted in connection with references to
6、 figures in this publication, they are IEC page numbers. Cross reference. For the following reference to another IEC Publication that is given in the text, there is an equivalent British Standard, given below. WARNING NOTE. Attention is drawn to the health hazard which may arise when this test is pe
7、rformed (see clause 9 of BS 2011-2.2Sa:1977). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligati
8、ons. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Re
9、ference to IEC PublicationEquivalent British Standard IEC 68-2-9 Basic environmental testing procedures BS 2011-2.2Sa Basic environmental testing procedures Part 2 Test: Test Sa Guidance for solar radiation testing. Part 2.2 Guidance: Test Sa Guidance for solar radiation testing. Amendments issued s
10、ince publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:45:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2011-2.1Sa:1977 BSI 04-1999i Contents Page ForewordInside front cover 1Object1 2Initial measurements1 3Test apparatus1 4Conditioning1 5Final measurement
11、s2 6Information required in the relevant specification2 Figure 1 Temperature-radiation-time relationships4 Table I Spectral energy distribution and permitted tolerances3 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:45:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy:
12、 sheffieldun sheffieldun, na, Tue Nov 28 13:45:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2011-2.1Sa:1977 BSI 04-19991 WARNING NOTEIntending users of this test are directed to the health hazards associated with tests of this nature and should therefore read Clause 9 of IEC Publication 68-2-9.
13、1 Object To determine the effects (thermal, mechanical, chemical, electrical, etc.), produced on equipment and components as a result of exposure to solar radiation under the conditions experienced at the surface of the earth. 2 Initial measurements The specimen(s) shall be visually inspected and el
14、ectrically and mechanically checked, as required by the relevant specification. 3 Test apparatus 3.1 The enclosure in which the tests are to be carried out shall be provided with means for obtaining over the prescribed irradiation measurement plane, an irradiance of 1.120 kW/m2 10 % with the spectra
15、l distribution given in Table I. The value of 1.120 kW/m2 shall include any radiation reflected from the test enclosure and received by the specimen under test. It should not include long-wave infra-red radiation emitted by the test enclosure; see Sub-clause 6.1 of IEC Publication 68-2-9. NOTEWhere
16、only the thermal effects of solar radiation are of interest, see Sub-clauses 2.2 and 2.3 of IEC Publication 68-2-9. 3.2 Means shall also be provided whereby the specified conditions of temperature, air flow and humidity can be maintained within the enclosure. NOTECirculation of air can significantly
17、 reduce the temperature rise of specimens: see Sub-clause 4.5 of IEC Publication 68-2-9. 3.3 The temperature within the enclosure shall be measured (with adequate shielding from radiated heat) at a point or points in a horizontal plane 0 mm to 50 mm below the prescribed irradiation measurement plane
18、, at half the distance between the specimen under test and the wall of the enclosure, or at 1 m from the specimen, whichever is the lesser. 4 Conditioning 4.1 The specimen to be tested shall be placed either on raised supports or on a specified substrate of known thermal conductivity and thermal cap
19、acity within the enclosure and so spaced from other specimens as to avoid shielding from the source of radiation or re-radiated heat; see Sub-clause 4.6 of IEC Publication 68-2-9. 4.2 During the entire test, the irradiation, the temperature within the enclosure, the humidity and any other specified
20、environmental conditions shall be maintained at the levels appropriate to the particular test procedure as called for in the relevant specification. 4.3 The specimen shall be exposed, for the duration called for in the relevant specification, to one of the following test procedures (see Figure 1): P
21、rocedure A A 24 h cycle, with 8 h irradiation and 16 h darkness, repeated as required. (This gives a total irradiation 8.96 kWh/m2 per diurnal cycle, which approximates to the most severe natural conditions.) Procedure B A 24 h cycle, with 20 h irradiation and 4 h darkness, repeated as required. (Th
22、is gives a total irradiation of 22.4 kWh/m2 per diurnal cycle.) Procedure C Continuous irradiation, as required. NOTEFor further information, see Sub-clauses 3.1 and 3.2 of IEC Publication 68-2-9. 4.4 During irradiation, the temperature within the enclosure shall rise at an approximately linear rate
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