BS ISO 11155-2:2009

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement accuracy
   4.1 Flow rate
   4.2 Pressure
   4.3 Temperature
   4.4 Relative humidity
   4.5 Challenge gas
5 General conditions
   5.1 Conditioning of challenge gas
   5.2 Cleanliness of influent air
   5.3 Challenge gas concentration stability
6 Test contaminants
   6.1 Mandatory contaminants
   6.2 Optional contaminants
   6.3 Other contaminants
7 Test equipment
   7.1 General layout
   7.2 Test stand performance
   7.3 Air supply
   7.4 Test duct
   7.5 Contaminant generation and supply
   7.6 Sampling and analysis of challenge gas
   7.7 Test equipment constituents
8 Experimental determination of t[0], using t[lag]
9 Preparation of filter/filter element for testing
10 Test methods
   10.1 Purpose
   10.2 Air pressure loss
   10.3 Preparation of challenge gases
   10.4 Determination of efficiency/breakthrough
   10.5 Determination of capacity
   10.6 Data and analysis
   10.7 Determination of desorption (optional)
11 System validation
   11.1 Air flow uniformity
   11.2 Verification challenge gas stability (without test
        filter)
12 Test report
Annex A (normative) - Test stand configuration
Annex B (normative) - Detailed definition and calculation of
        t[0] and t[lag]
Annex C (normative) - Capacity determination
Annex D (informative) - Conversion of test contaminant
        concentration units
Bibliography

Describes a test comprising several methods for measuring the dynamic gas adsorption of air filters in the passenger compartments of road vehicles.

This part of ISO11155 specifies a test comprising several methods for measuring the dynamic gas adsorption of air filters in the passenger compartments of road vehicles. These laboratory test methods are applicable to air filters that improve air quality by reducing concentrations of gaseous, odorous or hazardous components from ambient or re-circulated air, or both, in the vehicle cabin. They provide a means of measuring air pressure loss, as well as gas and vapour removal characteristics.