Research and Analysis of a Portable Precision Temperature Sensor

Hai Qing Yao; Heng Cao; Fei Jiang; Bo Sun

doi:10.4028/www.scientific.net/AMR.945-949.1924

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 945-949Research and Analysis of a Portable Precision...

Research and Analysis of a Portable Precision Temperature Sensor

Abstract:

Based on the excellent performance of Pt100, a portable low-cost precision temperature sensor has been designed, whose core chips are REF03, AD8603, AD7788 and precision resistors. Constant current source (CCS) for 4-wire Pt100 is constituted by REF03, AD8603 and precision resistors. AD7788 measures the differential signal on Pt100 and suppresses the common mode interference signal. Analysis software running on the micro control unit (MCU) filters the digital code from AD7788, and then calculates the current temperature value according to the resistance-temperature mathematical model of Pt100. Analysis and experimental results show that the temperature measurement accuracy of the sensor can reach ±1°C within the range of 0°C-650°C.

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Periodical:

Advanced Materials Research (Volumes 945-949)

Pages:

1924-1931

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.945-949.1924

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Online since:

June 2014

Authors:

Hai Qing Yao, Heng Cao*, Fei Jiang, Bo Sun

Keywords:

Constant Current Source, Streamlined Design, Temperature Sensor, Uncertainty

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* - Corresponding Author

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