ISO 29463-5:2022
High-efficiency filters and filter media for removing particles in air — Part 5: Test method for filter elements
This document specifies the test methods for determining the efficiency of filters at their most penetrating particle size (MPPS). It also gives guidelines for the testing and classification for filters with an MPPS of less than 0,1 μm (Annex B) and filters using media with (charged) synthetic fibres (Annex C). It is intended for use in conjunction with ISO 29463‑1, ISO 29463‑2, ISO 29463‑3 and ISO 29463‑4.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.2 Symbols and abbreviated terms
4 Efficiency test methods
4.1 Reference efficiency test method
4.2 Alternate efficiency test method for groups H and U filters
4.3 Statistical efficiency test method for low efficiency filters — Group E filters
5 Test filter
6 Test apparatus
6.1 General
6.2 Test duct
6.2.1 Test air conditioning
6.2.2 Adjustment of the volume flow rate
6.2.3 Measurement of the volume flow rate
6.2.4 Aerosol mixing section
6.2.5 Test filter mounting assembly
6.2.6 Measuring points for the pressure drop
6.2.7 Sampling
6.3 Aerosol generation and measuring instruments
6.3.1 General
6.3.2 Apparatus for testing with a mono-disperse test aerosol
6.3.3 Apparatus for testing with a poly-disperse test aerosol
7 Conditions of the test air
8 Test procedure
8.1 Preparatory checks
8.2 Starting up the aerosol generator
8.3 Preparation of the test filter
8.3.1 Installation of the test filter
8.3.2 Flushing the test filter
8.4 Testing
8.4.1 Measuring the pressure drop
8.4.2 Testing with a mono-disperse test aerosol
8.4.3 Testing with a poly-disperse test aerosol
8.4.4 Testing filters with charged media
9 Evaluation
10 Test report
11 Maintenance and inspection of the test apparatus
Annex A (normative) Alternate efficiency test method from scan testing
Annex B (informative) Testing and classification method for filters with MPPS ≤ 0,1 µm (e.g. membrane medium filters)
Annex C (normative) Method for testing and classification of filters using media with charged fibres
Annex D (informative) Traditional efficiency test methods for HEPA and ULPA filters
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.2 Symbols and abbreviated terms
4 Efficiency test methods
4.1 Reference efficiency test method
4.2 Alternate efficiency test method for groups H and U filters
4.3 Statistical efficiency test method for low efficiency filters — Group E filters
5 Test filter
6 Test apparatus
6.1 General
6.2 Test duct
6.2.1 Test air conditioning
6.2.2 Adjustment of the volume flow rate
6.2.3 Measurement of the volume flow rate
6.2.4 Aerosol mixing section
6.2.5 Test filter mounting assembly
6.2.6 Measuring points for the pressure drop
6.2.7 Sampling
6.3 Aerosol generation and measuring instruments
6.3.1 General
6.3.2 Apparatus for testing with a mono-disperse test aerosol
6.3.3 Apparatus for testing with a poly-disperse test aerosol
7 Conditions of the test air
8 Test procedure
8.1 Preparatory checks
8.2 Starting up the aerosol generator
8.3 Preparation of the test filter
8.3.1 Installation of the test filter
8.3.2 Flushing the test filter
8.4 Testing
8.4.1 Measuring the pressure drop
8.4.2 Testing with a mono-disperse test aerosol
8.4.3 Testing with a poly-disperse test aerosol
8.4.4 Testing filters with charged media
9 Evaluation
10 Test report
11 Maintenance and inspection of the test apparatus
Annex A (normative) Alternate efficiency test method from scan testing
Annex B (informative) Testing and classification method for filters with MPPS ≤ 0,1 µm (e.g. membrane medium filters)
Annex C (normative) Method for testing and classification of filters using media with charged fibres
Annex D (informative) Traditional efficiency test methods for HEPA and ULPA filters
Bibliography