IEC 61577-4:2009

FOREWORD
INTRODUCTION
1 Scope and object
2 Normative references
3 Terms, definitions and units
  3.1 General terms and definitions
  3.2 Specific terms and definitions
  3.3 Units and conversion factors
4 General description of a System for Test
Atmospheres with Radon (STAR)
  4.1 General
  4.2 Mode of operation of a STAR
      4.2.1 Static mode of operation
      4.2.2 Dynamic mode of operation
5 Characteristics of a STAR
  5.1 General
  5.2 STAR for radon
      5.2.1 General
      5.2.2 Technical characteristics of STAR containers
      5.2.3 Radon sources
      5.2.4 [222]Rn and [220]Rn analysis and control
      5.2.5 Analysis and control of climatic parameters
  5.3 STAR for radon and RnDP
      5.3.1 General
      5.3.2 Technical characteristics of STAR containers
      5.3.3 RnDP sources
      5.3.4 RnDP analysis and control
      5.3.5 Sampling flow rate of equipment under test
      5.3.6 Analysis and control of climatic parameters
6 Requirements for the reference atmosphere provided by
  STAR
  6.1 General
  6.2 Reference conditions
  6.3 Influence quantities
      6.3.1 General
      6.3.2 Temperature
      6.3.3 Relative humidity
      6.3.4 Atmospheric pressure
      6.3.5 Ambient gamma field
      6.3.6 Working range for exposure to RnDP
      6.3.7 Working range for aerosols
      6.3.8 Exposure time for the instrument under test
7 Calibration and traceability of measurement methods
  and instruments used in a STAR
  7.1 Traceability chains
  7.2 Quality assurance
Annex A (informative) Characteristics of atmospheres that
        can be simulated in a STAR
Bibliography

IEC 61577-4:2009 concerns the System for Test Atmospheres with Radon (STAR) needed for testing, in a reference atmosphere, the instruments measuring radon and RnDP. Provides guidance for those facing problems associated with the production of equipment for setting up reference atmospheres for radon and its decay products.