EN 60188-2001 en High-Pressure Mercury Vapour Lamps - Performance Specifications《高压水银蒸气灯 性能规范》.pdf
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1、BRITISH STANDARD High-pressure mercury vapour lamp s Performance specifications The European Standard EN 60188:2001 has the status ofa British Standard ICs 29.140.30 BS EN 60 188:200 1 IEC 60 188:200 1 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 60188:2001 Amd. No. N
2、ational foreword Date Comments This British Standard is the official English language version of EN 60 188:200 1. It is identical with IEC 60 188:200 1 .Together with BS EN 62035:2000 supersedes BS 3677:1989 which is withdrawn. The UKparticipation in its preparation was entrusted by Technical Commit
3、tee CPL/34, Lamps and related equipment, to Subcommittee CPL/34/1, Electrical lamps, which has the responsibility to: - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests inform
4、ed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IE
5、C 27-1 has been renumbered as IEC 60027-1. For a period oftime during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cr oss-r e fer enc e s The British Standards which implement international or European publications referred to in thi
6、s document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. User
7、s of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 17, a blank page, the Data
8、sheets (consisting of20 sheets) and aback cover. This British Standard, having been prepared under the direction-of the The BSI copyright date displayed in this document indicates when the Electrotechnical Sector Policy and Strategy Committee, was was last issued. published a fairly high and substan
9、tially uniform value above 615-620 nm. NOTE 1 The value at 580 nm is based on the need to have no appreciable transmission for the yellow doublet (577-579 nm) of the mercury spectrum. NOTE 2 Even though catalogue data for a given type of filter may indicate it to be satisfactory, there is very often
10、 a spread of the spectral characteristics between filters bearing the same type number but coming from different batches. For this reason, the filter should always be selected to ensure compliance with the requirements listed above. C.2 Method of measurement The light of the lamp X to be tested shal
11、l be successively measured without and with interposition of the red filter. The ratio of the second measurement to the first one yields an uncorrected measurement rux of the red ratio. Lamp N shall then be used to correct this measurement according to the following method: The light of the lamp N s
12、hall be similarly measured without and with the filter and the ratio of these measurements gives a value ruN. The knowledge of the spectral distribution of the lamp then allows its red ratio (rN) to be computed. The red ratio, as defined in 1.3.7, is the ratio of two integrals of the form 1 ,V(A)dA
13、over the red band and over the whole of the visible spectrum. The ratio c = rN / ruN gives the correction factor required for obtaining the red ratio for lamp X. This red ratio is given by rx = c . rux . O BSI 28 November 2001 Page 12 EN 60188:2001 The factor c corrects for both of the following: 0
14、the relationship between a measurement made with a filter and the value of the red ratio as defined by the two integrals, which is inherent in the principle of the method; an allowance for the fact that the photo-receiver used for the measurement will not be, in general, ideally adapted to the spect
15、ral luminous efficiency V(/z). 0 The method assumes that the ratio between the red ratio according to the definition and its uncorrected measurement with the filter is the same for both lamps X and N. It is this assumption which, as mentioned above, necessitates that the coatings of both lamps N and
16、 X emit light of similar spectral distributions. NOTE 1 The manufacturers of a lamp will generally be able to state whether that type of lamp may or may not be measured with a Type N as reference. The method also assumes that the spectral characteristic of the filter remains exactly the same when me
17、asuring both lamps N and X. Several types of red filters are very sensitive to temperature so that the slope of their spectral transmittance relative to wavelengths shifts as the temperature varies. This phenomenon directly affects any response located within this region of the curve. This fact is o
18、f primary importance when considering the more recent types of coatings used. In such cases it is absolutely necessary to keep the filter at the same temperature when making measurements to be compared. Any significant heating should be avoided: for instance, by keeping the filter/photo-receiver ass
19、embly at sufficient distance from the light sources. Also, if the filter is placed too near to the photo-receiver, inter-reflections may occur. These however, will not result in any additional error provided that they remain the same for both comparative measurements. Consequently, since the filter
20、is constantly being removed and inserted, it is necessary to make sure that it is always kept in the same position relative to the photo-receiver. NOTE 2 The method does not require any determination of the spectral sensitivity of the photo-receiver. It is only necessary to check that the prescribed
21、 characteristics of the filter are obtained. The method may be used either with an integrating (or Ulbricht) sphere or with the directional measurements in a dark-room. In the latter case, a single measurement is sufficient if the fluorescent coating is homogeneous; otherwise, several measurements s
22、hould be taken in different directions and the mean of the intensities used. If an integrating sphere is used, a slight selectivity of its internal surface finish is immaterial as this is equivalent to an alteration of the spectral sensitivity of the photo-receiver. NOTE 3 It is recommended that a s
23、pectrophotometric check of the lamp(s) N should be made after a few hundred hours of operation in order to ascertain whether the spectral distribution is affected by ageing. O BSI 28 November 2001 Page 13 EN 60188:2001 Annex D (i n for m a t ive) Information for luminaire design D.l Maximum lamp out
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