A Precision Resistance Generator for the Calibration of RTD-Based Temperature Instruments

Pan Hui Chen; Li Feng Guo; Gu Bing Lu; Chuan Xi Jin

doi:10.4028/www.scientific.net/AMM.721.513

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 721A Precision Resistance Generator for the...

A Precision Resistance Generator for the Calibration of RTD-Based Temperature Instruments

Abstract:

A new calibration method for RTD-based temperature instrument is introduced. The precision resistance is generated using digital-controlled relays to switch a precision resistance network which is similar to the resistance box. We also present a new switch algorithm to reduce the influence of initial error of the precision resistors. The resistance of the precision resistance generator varies from 80.00ohms to 260.00ohms with a 4-wire output interface. It is convenient that using this precision resistance generator to test the nonlinear of temperature transmitters based on Pt100. Our test shows that the generator can provide a precision resistance with an uncertainty of less than ±0.02ohms.

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Periodical:

Applied Mechanics and Materials (Volume 721)

Pages:

513-516

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.721.513

Citation:

Cite this paper

Online since:

December 2014

Authors:

Pan Hui Chen*, Li Feng Guo, Gu Bing Lu, Chuan Xi Jin

Keywords:

4-Wire Output, Precision, Pt100, Resistance Source, RTD-Based, Temperature Instrument

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* - Corresponding Author

References

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