SN EN 1822-4 : 2010
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
HIGH EFFICIENCY AIR FILTERS (EPA, HEPA AND ULPA) - PART 4: DETERMINING LEAKAGE OF FILTER ELEMENTS (SCAN METHOD)
01-17-2020
01-12-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 sampling volume flow rate
3.2 sampling duration
3.3 total particle count method
3.4 particle counting and sizing method
3.5 particle flow rate
3.6 particle flow distribution
4 Description of the procedure
5 Test filter
6 Test apparatus
6.1 Set-up of the test apparatus
6.2 Test duct
6.3 Scanning assembly
6.4 Aerosol generation and measurement techniques
7 Test air
8 Test procedure
8.1 General
8.2 Preparatory checks
8.3 Starting up the aerosol generator
8.4 Preparing the test filter
8.5 Testing
9 Evaluation
9.1 Calculating the penetration and the efficiency
9.2 Local penetration
9.3 Mean efficiency
9.4 Classification
10 Test report
10.1 Details of the test filter
10.2 General details of the test parameters
10.3 Test results
11 Maintenance and inspection of the test apparatus
Annex A (normative) Oil thread test
Annex B (normative) Determining the test parameters
Annex C (informative) Example of an application with
evaluation
Bibliography
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