The Method of Conductor Resistance Autocompensation in New Two-Wire Thermistor Temperature Measurement

Ning Yang; Hai Ting Zhu; Shao Shan Zhong

doi:10.4028/www.scientific.net/AMR.718-720.450

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 718-720The Method of Conductor Resistance...

The Method of Conductor Resistance Autocompensation in New Two-Wire Thermistor Temperature Measurement

Abstract:

Thermistor has a large temperature range, good stability and resistance to oxidation, which occupies an important position in the low-temperature measurement. This article describes new two-wire thermistor temperature measurement device using the Freescale MC9S12XS128 MCU with sampling capacitance. The device is composed of the MCU with its own A/D, MC9S12XS128 MCU, sampling capacitance, amplifier, boosted circuit, data acquisition and processing system, constant current source, etc. Using constant current source and 16-bit A/D converter designs the temperature measurement circuit, it can eliminate the effect from the conductor resistances in the traditional two-wire resistance temperature measurement system and reduce the measurement error which conductor resistances bring. The method is simple, practical, with high accuracy, strong anti-interference ability and other characteristics.

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Periodical:

Advanced Materials Research (Volumes 718-720)

Pages:

450-454

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.718-720.450

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Online since:

July 2013

Authors:

Ning Yang, Hai Ting Zhu, Shao Shan Zhong

Keywords:

Conductor Resistance, Micro Controller Unit (MCU), Temperature Measurement, Thermistor, Two-Wire

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