EN 60522:1999

FOREWORD
1 Scope and object
  1.1 Scope
  1.2 Object
2 Normative references
3 Terminology
  3.1 Degree of requirements
  3.2 Use of terms
  3.3 Defined terms
4 Measurement of permanent filtration
  4.1 General
  4.2 Test sample
  4.3 Generation of the x-ray beam for measurement
  4.4 Radiation detector
  4.5 Composition of reference materials
  4.6 Method of measurement
5 Indications and statements of permanent filtration
Annex A (normative) Terminology - Index of defined terms
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications

Defines the concept of permanent filtration in X-ray tube assemblies for medical diagnosis and radiotherapy and describes a method for its determination. It contains requirements for statements of compliance for accompanying documents and for markings on X-ray tube assemblies. Methods are given to determine the permanent filtration in an X-ray tube assembly with an accuracy that is sufficient to enable the appropriate additional filtration to be provided in order to attain the desired total filtration.