BS ISO 11155-2:2009

BS ISO 11155-2:2009 Road vehicles. Air filters for passenger compartments. Test for gaseous filtration

BS ISO 11155-2 specifies a test comprising several methods for measuring the dynamic gas adsorption of air filters in the passenger compartments of road vehicles.

The laboratory test methods in BS ISO 11155-2 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.

Contents of BS ISO 11155-2:

• Foreword
• Scope
• Normative references
• Terms and definitions
• Measurement accuracy
• Flow rate
• Pressure
• Temperature
• Relative humidity
• Challenge gas
• General conditions
• Conditioning of challenge gas
• Cleanliness of influent air
• Challenge gas concentration stability
• Test contaminants
• Mandatory contaminants
• Optional contaminants
• Other contaminants
• Test equipment
• General layout
• Test stand performance
• Air supply
• Test duct
• Contaminant generation and supply
• Sampling and analysis of challenge gas
• Test equipment constituents
• Experimental determination of t0, using tlag
• Preparation of filter/filter element for testing
• Test methods
• Purpose
• Air pressure loss
• Preparation of challenge gases
• Determination of efficiency/breakthrough
• Determination of capacity
• Data and analysis
• Determination of desorption (optional)
• System validation
• Air flow uniformity
• Verification challenge gas stability (without test filter)
• Test report
• Test stand configuration
• Detailed definition and calculation of t0 and tlag
• Capacity determination
• Conversion of test contaminant concentration units
• Bibliography