Ensuring Instrument Performance for Vehicle Emissions
Global Technical Regulation 15 (GTR 15)
GTR 15 outlines the procedures for light-duty vehicle type approval testing, published by the UN ECE Working Party on Pollution and Energy (GRPE). It specifies that particulate emissions must be measured by number concentration using a particle number counter (PNC; section 4.3.1.1.1). The PNC must be calibrated according to ISO 27891 (Section 5.7.1.3) and meet specified D50 and D90 values (section 4.3.1.3.4 [h]). TSI's Engine Exhaust Condensation Particle Counters EECPC 3790A and EECPC 3790A-10 are commonly used for PNC measurements. TSI also offers calibration services beyond ISO 27891 for various applications.