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BS EN ISO 21083-1:2018 Test method to measure the efficiency of air filtration media against spherical nanomaterials - Size range from 20 nm to 500 nm >
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BS EN ISO 21083-1:2018 Test method to measure the efficiency of air filtration media against spherical nanomaterials - Size range from 20 nm to 500 nm, 2018
- undefined
- European foreword
- Endorsement notice
- 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 Principle
- 5 Test materials
- 5.1 General
- 5.2 Liquid phase aerosol
- 5.2.1 DEHS test aerosol
- 5.2.2 Liquid phase aerosol generation
- 6 Test setup
- 6.1 General
- 6.2 Specification of setup
- 6.2.1 Aerosol generation system
- 6.2.2 Tubing
- 6.2.3 Dryer
- 6.2.4 DEMC
- 6.2.5 Equilibrium charge distribution and neutralization of aerosol particles
- 6.2.6 Neutralization of aerosol particles
- 6.2.7 Make-up air line
- 6.2.8 Test filter medium mounting assembly
- 6.2.9 CPC
- 6.2.10 Final filter
- 6.3 Detailed setup for test using DEHS particles
- 6.4 Determination of the filter medium velocity
- 7 Qualification of the test rig and apparatus
- 7.1 CPC tests
- 7.1.1 CPC — Air flow rate stability test
- 7.1.2 CPC — Zero test
- 7.1.3 CPC — Overload test
- 7.1.4 Counting accuracy calibration
- 7.2 DEMC tests
- 7.3 Qualification of aerosol neutralization
- 7.3.1 General
- 7.3.2 Qualification of neutralization by checking the multiple charge fraction on the particles passing through the neutralizer
- 7.3.3 Qualification of the aerosol neutralizer using corona discharge balanced output
- 7.3.4 Qualification of neutralization according to ISO/TS 19713-1
- 7.4 System leak checks
- 7.4.1 Air leakage tests
- 7.4.2 Visual detection by cold smoke
- 7.4.3 Pressurization of the test system
- 7.4.4 Use of high efficiency filter media
- 7.5 Uniformity of the test aerosol concentration
- 8 Test procedure
- 8.1 Determination of the correlation ratio/zero efficiency test
- 8.2 Protocol of filtration efficiency measurement
- 8.2.1 Preparatory checks
- 8.2.2 Equipment preparation
- 8.2.3 Aerosol generator
- 8.2.4 Aerosol generator — Neutralizer
- 8.2.5 Filter medium neutralization
- 8.2.6 Filter medium neutralization according to ISO 29461-1
- 8.2.7 Air flow measurement
- 8.2.8 Measurement of the pressure drop
- 8.2.9 Zero count test
- 8.2.10 Air leakage test
- 8.2.11 Loading effect test
- 8.2.12 Reported values
- 8.2.13 Measurement of filtration efficiency — DEHS particles
- 8.3 Test evaluation
- 8.4 Measurement protocol for one sample — Summary
- 8.4.1 Using one CPC to measure the upstream and downstream particle concentrations
- 8.4.2 Using two CPCs to measure the upstream and downstream particle concentrations
- 9 Maintenance items
- 10 Measurement uncertainties
- 11 Reporting results
- 11.1 General
- 11.2 Required reporting elements
- 11.2.1 General
- 11.2.2 Report summary
- 11.2.3 Report Details
- Annex A (informative) Instruments specifications
- Annex B (informative) Statistical analysis for precision of an experiment (according to ISO 5725-2)
- Annex C (informative) Safe use of IPA
- Annex D (informative) Safe handling of radioactive devices
- Bibliography [Go to Page]