EN 25580-1992 en Non-Destructive Testing - Industrial Radiographic Illuminators - Minimum Requirements《无损检验 工业射线照像照明器 最低要求(ISO 5580-85)》.pdf
《EN 25580-1992 en Non-Destructive Testing - Industrial Radiographic Illuminators - Minimum Requirements《无损检验 工业射线照像照明器 最低要求(ISO 5580-85)》.pdf》由会员分享,可在线阅读,更多相关《EN 25580-1992 en Non-Destructive Testing - Industrial Radiographic Illuminators - Minimum Requirements《无损检验 工业射线照像照明器 最低要求(ISO 5580-85)》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、CEN EN*25580 92 W 3404589 0025873 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 25580 April 1992 CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Noimung Central Secretariat: rue de Stassart 36, B-1050 Brussels O CEN 1992 Copyright reserved to a
2、ll CEN members Ref. No. EN 25580 : 1992 E _. UDC 620.179.152.05 : 620.186 Desciiptois: Non-destructive tests, industrial radiography, radiographic iiluminators, equipment specifications, screens : Display, luminance, divergence, lighting, optical measurements, marking English version Non-destructive
3、 testing - Industrial radiographie illuminators - Minimum requirements (IS0 5580 : 1985) Essais non destructifs - Ngatoscopes utiliss en radiographie industrielle - Exigences minimales Radiographie - Minimale Anforderungen (IS0 5580 : 1985) Zerstrungsfreie Prfung - Betrachtungsgerte fr die industrie
4、lle (IS0 5580 : 1985) This European Standard was approved by CEN on 1992-03-27. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bib
5、liographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, Geiman). A version in any other language made by translation under the responsibility
6、of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Noiway, Portugal
7、, Spain, Sweden, Switzerland and United Kingdom. CEN EN*Z5580 92 U 3404589 0025872 T Page 2 EN 25580 : 1992 Foreword In 1990, IS0 5580 : 1985 was submitted to the CEN Primary Questionnaire procedure. Following the positive result of this procedure, the CEN %chnical Board, agreed to submit IS0 5580 :
8、 1986, without modifications, to Formal Vote. The result of the Formal Vote was positive. National standards identical to this European Standard shall be published at the latest by 92-10-31 and conflicting national standards shall be withdrawn at the latest by 92-10-31. In accordance with the CENKEN
9、ELEC Common Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN EN*Z5580 92 3404589 0025873 1
10、Page 3 EN 25580 : 1992 Non-destructive testing - Industrial radiographic illuminators - Minimum requirements 1 Scope and field of application This International Standard specifies the minimum require- ments for industrial illuminators used for viewing radiographs. The function of the illuminator is
11、to allow the viewing of radiographs. The illuminator shall guarantee the same safety of personnel as an electric apparatus with maximum voltage, insulation and earthing which is required by corresponding safety standards of electrotechnics in each country where these are applied. 2 Characteristics o
12、f radiographic illuminators 2.1 Mechanical construction An illuminator consists of the housing with one of the sides being the viewing screen illuminated from the inside. This screen can itself be the diffusing screen. This housing may also contain a system for thermal protection of the radiographs;
13、 this system may or may not be ventilated. For the viewing of wet radiographs, the illuminator shall be so designed as to prevent penetration of the liquid if the radiograph comes into contact with the screen. 2.2 Viewing screen The screens shall be easy to clean and shall be made of a material whic
14、h is resistant to scratching during cleaning pro- cesses recommended by the manufacturer and during film viewing. NOTE - The screen may be a combination of elements, all of which should be resistant to heat in terms of deformation and discoloration. The size of the screens shall allow the viewing of
15、 a radiograph without excessive glare reaching the eyes of the operator. Should the illuminator be used for viewing radiographs of dif- ferent sizes, a system of covering masks shall be provided. 2.3 Luminance The screen luminance required depends on the density of the radiographs. The following lum
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