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AS ISO 16900.4:2015
[Current]Respiratory protective devices - Methods of test and test equipment, Part 4: Determination of gas filter capacity and migration, desorption and carbon monoxide dynamic testing
Adopts ISO16900-4:2011 to specify test methods for determining the gas capacity of separate or integral gas filters and combined filters for respiratory protective devices as well as carbon monoxide dynamic testing.
Published: 30/06/2015
Pages: 16
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Prerequisites
5 General test requirements
6 Principles
6.1 Sorption tests
6.1.1 Gas capacity test
6.1.2 Gas filter validation test at specified flow rates
6.2 Migration and desorption tests
6.2.1 Migration test A and migration test B
6.2.2 Desorption test
6.3 Carbon monoxide (CO) dynamic testing of type CO filter
7 Apparatus
7.1 Apparatus for constant flow
7.2 Challenge gas generator
7.3 Test chamber
7.4 Detector
7.5 Apparatus for dynamic flow
8 Methods
8.1 General
8.2 Test flow conditions
8.2.1 General
8.2.2 Multiple filters
8.3 Gas capacity test
8.3.1 General
8.3.2 Constant flow test
8.3.3 Dynamic flow test
8.3.3.1 General
8.3.3.2 Bidirectional method
8.3.3.3 Unidirectional method
8.4 Gas filter validation test at specified flow rates
8.5 Migration test A and Migration test B
8.5.1 Migration test A
8.5.2 Migration test B
8.6 Desorption test
9 Test report
9.1 General
9.2 Gas capacity test
9.3 Gas filter validation test at specified flow rates
9.4 Migration test
9.5 Desorption test
9.6 CO dynamic test
10 Uncertainty of measurement
Annex A
A.1 Determination of compliance
Annex B
B.1 Principle
B.2 Theoretical breakthrough time
B.2.1 The Wheeler-Jonas equation
B.2.2 Defining constants
B.3 Applicability
B.4 Procedure
B.5 Data analysis
B.6 Determination of breakthrough time
Bibliography
Cited references in this standard
Content history
[Current]
[Current]
DR AS/NZS ISO 16900.4:2015
AS ISO 16900.4:2015 REC:2024
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