ISO 16890-2:2016
Air filters for general ventilation — Part 2: Measurement of fractional efficiency and air flow resistance
ISO 16890-2:2016 specifies the aerosol production, the test equipment and the test methods used for measuring fractional efficiency and air flow resistance of air filters for general ventilation.
It is intended for use in conjunction with ISO 16890‑1, ISO 16890‑3 and ISO 16890‑4.
The test method described in this part of ISO 16890 is applicable for air flow rates between 0,25 m3/s (900 m3/h, 530 ft3/min) and 1,5 m3/s (5 400 m3/h, 3 178 ft3/min), referring to a test rig with a nominal face area of 610 mm × 610 mm (24,0 inch × 24,0 inch).
ISO 16890 (all parts) refers to particulate air filter elements for general ventilation having an ePM1 efficiency less than or equal to 99 % and an ePM10 efficiency greater than 20 % when tested as per the procedures defined within ISO 16890 (all parts).
NOTE The lower limit for this test procedure is set at a minimum ePM10 efficiency of 20 % since it will be very difficult for a test filter element below this level to meet the statistical validity requirements of this procedure.
Air filter elements outside of this aerosol fraction are evaluated by other applicable test methods, (see ISO 29463 (all parts)).
Filter elements used in portable room-air cleaners are excluded from the scope.
The performance results obtained in accordance with ISO 16890 (all parts) cannot by themselves be quantitatively applied to predict performance in service with regard to efficiency and lifetime.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
4.1 Symbols
4.2 Abbreviated terms
5 General test requirements
5.1 Test device requirements
5.2 Test device installation
5.3 Test rig requirements
6 Test materials
6.1 Liquid phase aerosol
6.1.1 DEHS test aerosol
6.1.2 DEHS/DES/DOS - formula
6.1.3 DEHS properties
6.1.4 Liquid phase aerosol generation
6.2 Solid phase aerosol
6.2.1 Potassium chloride (KCl) test aerosol
6.2.2 KCl - formula
6.2.3 KCl properties
6.2.4 Solid phase aerosol generation
6.3 Reference aerosols
6.3.1 Reference aerosol for 0,3 µm to 1,0 µm
6.3.2 Reference aerosol for 1,0 µm to 10,0 µm
6.3.3 Other reference aerosols
6.3.4 Matching criteria
6.4 Aerosol loading
7 Test equipment
7.1 Test rig
7.1.1 Dimensions
7.1.2 Construction materials
7.1.3 Test rig shape
7.1.4 Test rig air supply
7.1.5 Test rig isolation
7.1.6 D/S mixing orifice
7.1.7 Aerosol sampling
7.1.8 Test rig air flow rate measurement
7.1.9 Resistance to air flow measurement
7.1.10 Non 610 mm × 610 mm (24,0 inch × 24,0 inch) test devices
7.1.11 Dust injection testing
7.2 Aerosol particle counter
7.2.1 General
7.2.2 OPC sampled size range
7.2.3 OPC particle size ranges
7.2.4 Sizing resolution
7.2.5 Calibration
7.2.6 Air flow rate
7.2.7 Zero counting
7.2.8 Dual OPC(s)
7.3 Temperature, relative humidity
8 Qualification of test rig and apparatus
8.1 Schedule of qualification testing requirements
8.1.1 General
8.1.2 Qualification testing
8.1.3 Qualification documentation
8.2 Qualification testing
8.2.1 Test rig — Pressure system testing
8.2.2 OPC — Air flow rate stability test
8.2.3 OPC — Zero test
8.2.4 OPC — Sizing accuracy
8.2.5 OPC — Overload test
8.2.6 Aerosol generator — Response time
8.2.7 Aerosol generator — Neutralizer
8.2.8 Test rig — Air leakage test
8.2.9 Test rig — Air velocity uniformity
8.2.10 Test rig — Aerosol uniformity
8.2.11 Test rig — Downstream mixing
8.2.12 Test rig — Empty test device section pressure
8.2.13 Test rig — 100 % efficiency test and purge time
8.2.14 Test rig — Correlation ratio
8.3 Maintenance
8.3.1 General
8.3.2 Test rig — Background counts
8.3.3 Test rig — Reference filter test
8.3.4 Test rig — Pressure reference test
8.3.5 Test rig — Final filter resistance
9 Test methods
9.1 Air flow rate
9.2 Measurement of resistance to air flow
9.3 Measurement of fractional efficiency
9.3.1 Aerosol sampling protocol
9.3.2 Background sampling
9.3.3 Testing sequence for a single OPC
9.3.4 Testing sequence for dual OPC testing
10 Data reduction and calculations
10.1 Correlation ratio
10.1.1 Correlation ratio general
10.1.2 Correlation ratio data reduction
10.2 Penetration and fractional efficiency
10.2.1 Penetration and fractional efficiency general
10.2.2 Penetration data reduction
10.3 Data quality requirements
10.3.1 Correlation background counts
10.3.2 Efficiency background counts
10.3.3 Correlation ratio
10.3.4 Penetration
10.4 Fractional efficiency calculation
11 Reporting results
11.1 General
11.2 Required reporting elements
11.2.1 Report general
11.2.2 Report values
11.2.3 Report summary
11.2.4 Report details
Annex A (informative) Example
Annex B (informative) Resistance to air flow calculation
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
4.1 Symbols
4.2 Abbreviated terms
5 General test requirements
5.1 Test device requirements
5.2 Test device installation
5.3 Test rig requirements
6 Test materials
6.1 Liquid phase aerosol
6.1.1 DEHS test aerosol
6.1.2 DEHS/DES/DOS - formula
6.1.3 DEHS properties
6.1.4 Liquid phase aerosol generation
6.2 Solid phase aerosol
6.2.1 Potassium chloride (KCl) test aerosol
6.2.2 KCl - formula
6.2.3 KCl properties
6.2.4 Solid phase aerosol generation
6.3 Reference aerosols
6.3.1 Reference aerosol for 0,3 µm to 1,0 µm
6.3.2 Reference aerosol for 1,0 µm to 10,0 µm
6.3.3 Other reference aerosols
6.3.4 Matching criteria
6.4 Aerosol loading
7 Test equipment
7.1 Test rig
7.1.1 Dimensions
7.1.2 Construction materials
7.1.3 Test rig shape
7.1.4 Test rig air supply
7.1.5 Test rig isolation
7.1.6 D/S mixing orifice
7.1.7 Aerosol sampling
7.1.8 Test rig air flow rate measurement
7.1.9 Resistance to air flow measurement
7.1.10 Non 610 mm × 610 mm (24,0 inch × 24,0 inch) test devices
7.1.11 Dust injection testing
7.2 Aerosol particle counter
7.2.1 General
7.2.2 OPC sampled size range
7.2.3 OPC particle size ranges
7.2.4 Sizing resolution
7.2.5 Calibration
7.2.6 Air flow rate
7.2.7 Zero counting
7.2.8 Dual OPC(s)
7.3 Temperature, relative humidity
8 Qualification of test rig and apparatus
8.1 Schedule of qualification testing requirements
8.1.1 General
8.1.2 Qualification testing
8.1.3 Qualification documentation
8.2 Qualification testing
8.2.1 Test rig — Pressure system testing
8.2.2 OPC — Air flow rate stability test
8.2.3 OPC — Zero test
8.2.4 OPC — Sizing accuracy
8.2.5 OPC — Overload test
8.2.6 Aerosol generator — Response time
8.2.7 Aerosol generator — Neutralizer
8.2.8 Test rig — Air leakage test
8.2.9 Test rig — Air velocity uniformity
8.2.10 Test rig — Aerosol uniformity
8.2.11 Test rig — Downstream mixing
8.2.12 Test rig — Empty test device section pressure
8.2.13 Test rig — 100 % efficiency test and purge time
8.2.14 Test rig — Correlation ratio
8.3 Maintenance
8.3.1 General
8.3.2 Test rig — Background counts
8.3.3 Test rig — Reference filter test
8.3.4 Test rig — Pressure reference test
8.3.5 Test rig — Final filter resistance
9 Test methods
9.1 Air flow rate
9.2 Measurement of resistance to air flow
9.3 Measurement of fractional efficiency
9.3.1 Aerosol sampling protocol
9.3.2 Background sampling
9.3.3 Testing sequence for a single OPC
9.3.4 Testing sequence for dual OPC testing
10 Data reduction and calculations
10.1 Correlation ratio
10.1.1 Correlation ratio general
10.1.2 Correlation ratio data reduction
10.2 Penetration and fractional efficiency
10.2.1 Penetration and fractional efficiency general
10.2.2 Penetration data reduction
10.3 Data quality requirements
10.3.1 Correlation background counts
10.3.2 Efficiency background counts
10.3.3 Correlation ratio
10.3.4 Penetration
10.4 Fractional efficiency calculation
11 Reporting results
11.1 General
11.2 Required reporting elements
11.2.1 Report general
11.2.2 Report values
11.2.3 Report summary
11.2.4 Report details
Annex A (informative) Example
Annex B (informative) Resistance to air flow calculation
Bibliography