Development of a circuit that linearizes the response of a Platinum Resistance Temperature Detector

Author

Gus C. Pabon

Date of Award

8-1985

Degree Type

Thesis

Degree Name

Master of Science

Major

Electrical Engineering

Major Professor

T. Vaughn Blalock

Committee Members

Eldredge J. Kennedy, James M. Rochelle

Abstract

This thesis presents the development and analysis of a signal processor that linearizes the response of a Platinum Resistance Temperature Detector, commonly referred to as RTD.

The function of the RTD Processor is to accurately measure temperature in any resistance thermometry application which uses the RTD as a temperature transducer. The characteristic change of the RTD's electrical resistance with temperature makes possible this measurement; however, a linearizing circuit is needed because the resistance change with temperature is not linear.

Calculated results show that the circuit is capable of producing a temperature inaccuracy of 0.005% of full scale temperature for 0 to 200%deg;C and 0.05% inaccuracy of full scale temperature for the range of 0 to 600°C. Experimental results confirm the linearity of the output response of the circuit and are correlated with predicted results given in this thesis. The maximum error encountered in experimentation was 0.02% of full scale temperature for the range of 0 to 200°C.

Recommended Citation

Pabon, Gus C., "Development of a circuit that linearizes the response of a Platinum Resistance Temperature Detector. " Master's Thesis, University of Tennessee, 1985.
https://trace.tennessee.edu/utk_gradthes/14095