INTEGRATE APPROACH TO THE CALIBRATION OF NITROGEN OXIDES ANALYSERS AND TO THE EVALUATION OF THEIR MEASUREMENT UNCERTAINTY
Abstract
The present work describes the approach to evaluate in a metrological correct and exhaustive way the contribution of the several sources to the uncertainty related to the calibration of nitrogen oxides (NO<sub>X</sub>) analysers, focusing in particular on non dispersive infrared (NDIR) analysers. In order to minimize the contribution due to the uncertainty on the composition of the calibration standards, gas mixtures of NO<sub>X</sub> prepared with the gravimetric method are used. The performances of two different techniques, namely NDIR and chemiluminescence, are compared by analysing primary reference gas mixtures prepared at the Istituto Nazionale di Ricerca Metrologica (INRIM), having concentrations within 100 mmol·mol<sup>-1</sup> of NO<sub>X</sub>.
Event details
- Event
- XIX IMEKO World Congress
- Place
- Lisbon, PORTUGAL
- Time
- 6 September 2009 - 11 September 2009
- Website
- http://www.imeko2009.it.pt/