Road Vehicles - Portable Emission Measuring Systems (PEMS) - Performance Assessment; English version prEN 17507:2020
The document will define the procedures for assessing the performance of PEMS equipment, that are used for the on-road measurement of tailpipe emissions of light and heavy-duty vehicles, on the basis of a common test procedure that simulates the range of conditions experienced during on-road tests. The document will prescribe a) the tests to be conducted and b) a procedure to determine for any particular PEMS equipment, an appropriate uncertainty margin to reflect its performance over those conditions.The specific aims would be:- To be able to calibrate PEMS systems (gaseous and PN) under various operating environments with the intention of predicting PEMS performance over the whole range of light-duty RDE test conditions and heavy-duty PEMS test conditions using diesel and gasoline blends, CNG, LNG LPG and ED95 fuels.- To be able to evaluate the deviation of gaseous PEMS under various light-duty RDE test conditions and heavy-duty PEMS test conditions against known analyser systems under standard laboratory conditions for the specified gas, which is traceable to national or international primary standard.- To be able to evaluate the deviation of PN-PEMS under various light-duty RDE test conditionsand heavy-duty PEMS test conditions against a known analyser system under standard laboratory conditions for the same sample, which is traceable to national or international primary or secondary standard.- To define the means for demonstrating that the PEMS equipment is stable and the measurement quality is sufficient between PEMS equipment service intervals.- To provide input to the development of future specifications and quantified information about instrument and process accuracy to help improve the accuracy and robustness of PEMS systems and on-road measurements.- To set a framework for the determination of the uncertainty margins of PEMS equipment by analysing all available data.The key test variables are as follows (but not limited to the ones mentioned):a) Temperature, humidity and pressure and step-wise or gradual changes.b) Acceleration and deceleration (longitudinal and lateral).c) Vibration, inclination and shock tests.d) Instrument positioning on a vehicle.e) Combinations of (a) to (e).f) Cross-Interferencesg) Signal-processing, data treatment and time alignment h) Calculation methods (excluding the regulatory post-processing of data)Ideally, national metrological institutes and type-approval authorities should be involved to ensure compliance to other affected standards (e.g. ISO 17025, ISO 9001, ISO/TS 16949 etc).
Planned document number
DIN EN 17507