NEN EN 147 : 1992

Cooperating organizations
National foreword
Brief history
Specification
Preamble
1 Scope
2 References
3 Definitions and description
4 Classification and designation
5 Requirements
6 Testing
7 Instructions for use
8 Marking
Tables
1 Classification of devices
2 'Power-on' and 'power-off' classification
   requirements
3 Performance requirements and designation of filters
Figures
1 Schematic diagram of apparatus used in the
   determination of total inward leakage
2 Measurement of air supply flow rate (full face mask)
3 Measurement of air supply flow rate (half and quarter
   mask)
4 Schematic diagram of apparatus for assessment of
   flammability
5 Schematic diagram of test rig for carbon dioxide
   content of the inhalation air
6 Assembly of atomizer
National appendices
National appendix NA (informative)
National appendix NB (informative)

Describes minimum requirements for power assisted respiratory protective devices which incorporate a full face mask, half mask or a quarter mask together with a particle filter. Does not cover devices designed for use in circumstances where there is or might be any oxygen deficiency. Does not cover respiratory protective devices designed for escape purposes. Covers references, definitions and description, classification and designation, requirements, testing, instructions for use and marking. Includes tables and figures.