Calibration of exhaust emission testing device

Since the beginning of the company's activities more than 30 years ago, Topas has been manufacturing equipment for calibrating measuring instruments and especially number measuring instruments. Initially, FCS 248 photometer calibration system was used to calibrate photometers for mass concentrations up to 1 g/m³. FCS 249 field calibration system for the calibration of condensation particle counters (CPC) and electrical aerosol monitors (DC) was then developed from the expanded needs of the market due to the new version of the "Exhaust Emission Testing Equipment Calibration Guideline".

Since 2019, we have been dealing with the subject of calibrating exhaust gas particle testers. As a competence leader in the field of aerosol generation and conditioning, we were approached to develop a calibration system with specific requirements for size distribution and particle number concentrations. First, we combined existing and proven technology from aerosol generators, diffusion dryers and aerosol diluters.

Another requirement of the test centres and workshops is mobile use, which is time-consuming using a combination of several individual units. Therefore, our engineers developed a compact unit, which was optimised with regard to several relevant parameters. Today, a large number of FCS 249 field calibration systems for exhaust gas measuring instruments are in use by our customers in Europe and Asia. Among other features they particularly appreciate the constancy and reproducibility of the reference aerosol generation. More information is available in our application brochure on the subject of "Calibration of PTI particle counting devices with the help of suitable reference aerosols and measuring devices".