NEN EN 404 : 2005

Cooperating organizations
National foreword
Foreword
Specification
Introduction
1. Scope
2. Normative references
3. Definitions and description
4. Classification
5. Requirements
6. Testing
7. Instructions for use
8. Marking
Annexes
A. (informative) Method for the determination of wet
     bulb temperature of the inhaled air
B. (normative) Methods of measurement of the insulation
     resistance of non-metallic carrying containers
Tables
1. Classes of filter self-rescuers
2. Minimum test duration
3. Testing filter self-rescuers
4. Testing of devices after completion of transport test
5. Setting of breathing machine
6. Test conditions
Figures
1a. Scheme of test rig for filter self-rescuers
1b. Connector (typical)
1c. Connecting piece (typical)
1d. Counter part (typical)
2a. Scheme of test rig with cooler for filter self-
     rescuers
2b. Connector (alternative)
2c. Filtering device connected to alternative connector
3. Humidifier (typical)
4. Test equipment for vibration test
5. Test piece with painted electrodes for insulation
     resistance test
6. Connector for inhalation and exhalation valve testing
     at the test rig for filter self-rescuers
7. Scheme of test rig for carbon dioxide content of
     the inhalation air
8. Connector for carbon dioxide content of inhalation
     air (typical)
9. Connecting piece for carbon dioxide content of
     inhalation air (typical)
10. Counter part of connecting piece for carbon dioxide
     content of inhalation air (typical)
A.1 Schematic arrangement for the determination of wet
     bulb temperature of the inhaled air
B.1 Current measurement by microammeter or galvanometer
B.2 Current measurement by means of a d.c. amplifier
B.3 Comparative method
National annexes
National annex NA (informative) Committees responsible
National annex NB (informative) Cross-references

Relates to filtering devices designed for protection against carbon monoxide (filter self-rescuer). Specifies minimum requirements for filter self-rescuers.