In the present work, 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 non dispersive infrared (NDIR) analysers for nitrogen oxides (NOX), is described. Such approach has been studied in collaboration between Istituto Nazionale di Ricerca Metrologica (I.N.Ri.M.) and the Italian SIT (Calibration Service in Italy - Servizio di Taratura in Italia) accredited Centre n. 190 (Bi-Lab S.r.l.). In order to minimize the contribution due to the uncertainty on the composition of the calibration standards, gas mixtures of NOX prepared with the gravimetric method are used. In addition, performances of the above analysers are compared with those of the chemiluminescence ones by the analysis of primary reference gas mixtures prepared at I.N.Ri.M, within 100 umol•mol-1 of NOX concentration.
Integrate approach to the calibration of nitrogen oxides analysers and to the evaluation of their measurement uncertainty / AMICO DI MEANE, E; Baroncini, D; Crispu, S; Piras, G. C.; Sega, Michela. - (2009), pp. cd-rom-cd-rom. (Intervento presentato al convegno XIX IMEKO World Congress, Fundamental and Applied Metrology tenutosi a Lisbon, Portugal nel 6-11 September 2009).
Integrate approach to the calibration of nitrogen oxides analysers and to the evaluation of their measurement uncertainty
SEGA, MICHELA
2009
Abstract
In the present work, 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 non dispersive infrared (NDIR) analysers for nitrogen oxides (NOX), is described. Such approach has been studied in collaboration between Istituto Nazionale di Ricerca Metrologica (I.N.Ri.M.) and the Italian SIT (Calibration Service in Italy - Servizio di Taratura in Italia) accredited Centre n. 190 (Bi-Lab S.r.l.). In order to minimize the contribution due to the uncertainty on the composition of the calibration standards, gas mixtures of NOX prepared with the gravimetric method are used. In addition, performances of the above analysers are compared with those of the chemiluminescence ones by the analysis of primary reference gas mixtures prepared at I.N.Ri.M, within 100 umol•mol-1 of NOX concentration.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
