Experimental design techniques for optimizing psychrometric humidity sensor calibration

G. Betta;M. Dell'Isola;A. Frattolillo

1999-01-01

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Abstract

This paper tackles the design of a calibration using experimental design techniques. In particular, the optimum calibration pian for psychrometers, treated as a complex measurement chain, is identified by suitably elaborating the errar propagation law suggested by the ISO Guide. The obtained theoretical results are verified on a number of real calibrations, carried out in an humidity European Accredited Laboratory. The main advantages of the proposed approach consist in i) calibrati an plans with a reduced number of calibration points; ii) calibrati an curve applicable to to the whole temperature range; iii) linear rather than complex regression technique always usable.