EN 13274-3:2001

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Pre-requisites
5 General test requirements
6 Method 1: Static breathing resistance
   6.1 Principle
   6.2 Equipment
   6.3 Procedure
        6.3.1 Ambient conditions
        6.3.2 Procedure for filters
        6.3.3 Procedure for other devices
7 Method 2: Dynamic breathing resistance
   7.1 Principle
   7.2 Equipment
   7.3 Procedure
        7.3.1 General
        7.3.2 Inhalation resistance
        7.3.3 Exhalation resistance
Annex A (normative) - Fitting procedure for hoods which
         seal around the neck and which may or may not
         incorporate a head harness
   A.1 Introduction
   A.2 Principle
   A.3 Apparatus
         A.3.1 Sheffield dummy head/torso
         A.3.2 Stand and elastic string, for hoods which
                do not incorporate a head harness
         A.3.3 Adjustable collar
   A.4 Procedure
Annex B (normative) - Test results - Uncertainty of
         measurement
Annex ZA (informative) - Clauses of this European Standard
         addressing essential requirements or other
         provisions of EU Directives

This European Standard specifies the general procedure for measurement of breathing resistance of filters for respiratory protective devices and respiratory protective devices incorporating facepieces, except for diving for respiratory protective devices. The requirements and any special conditions for the apparatus, and of filter measurements are described in the relevant device standard.