EN 61577-2:2017

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 General design considerations
5 Technical components
6 Test conditions
7 Requirements and tests concerning radiation
   detection performance
8 Requirements and tests concerning air circuit
   performance
9 Requirements and tests concerning environmental
   performance
10 Requirements and tests concerning electrical
   performance
11 Requirements and tests concerning mechanical
   performance
12 Operation and maintenance manual
13 Type test report and certificate
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

This part of IEC 61577 describes the specific requirements for instruments measuring the activity concentration of airborne 222Rn and 220Rn outdoors, in dwellings, and in workplaces including underground mines.This standard applies practically to all types of electronic measuring instruments that are based on either spot or continuous measurements. The activity concentration can be measured by pumping or by diffusing the air containing 222Rn and/or 220Rn into the sensitive volume of the detection unit or at a particular moment by taking an air sample (grab sampling).