NBN 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