NS EN 1822-5 : 2009

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
      3.1 sampling volume flow rate
      3.2 sampling duration
      3.3 measuring procedure with fixed sampling
             probes
      3.4 total particle count method
      3.5 particle counting and sizing method
4 Description of the method
      4.1 Measurement method using fixed sampling probe
      4.2 Scan method
5 Test filter
6 Test apparatus
      6.1 Test duct
      6.2 Aerosol generation and measurement instruments
7 Test air
8 Test procedure
      8.1 Preparatory checks
      8.2 Starting up the aerosol generator
      8.3 Preparing the test filter
      8.4 Testing
9 Evaluation
10 Test report
11 Maintenance and inspection of the test apparatus

Describes a procedure for the determination of the efficiency on the basis of a particle counting method using a liquid test aerosol, and allows a standardized classification of these filters in terms of their efficiency.