NEN EN 1822-5 : 2009
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
HIGH EFFICIENCY AIR FILTERS (EPA, HEPA AND ULPA) - PART 5: DETERMINING THE EFFICIENCY OF FILTER ELEMENTS
01-10-2018
12-01-2013
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
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