A Procedure for Precise Determination and Compensation of Lead-Wire Resistance of a Two-Wire Resistance Temperature Detector

Simple item page
dc.contributor.authorRerkratn, Apinai
dc.contributor.authorPrombut, Supatsorn
dc.contributor.authorKamsri, Thawatchai
dc.contributor.authorRiewruja, Vanchai
dc.contributor.authorPetchmaneelumka, Wandee
dc.date.accessioned2026-08-06T10:37:07Z
dc.date.available2026-08-06T10:37:07Z
dc.date.issued2022-06-01
dc.description.abstractA procedure for the precise determination and compensation of the lead-wire resistance of a resistance transducer is presented. The proposed technique is suitable for a two-wire resistance transducer, especially the resistance temperature detector (RTD). The proposed procedure provides a technique to compensate for the lead-wire resistance using a three-level pulse signal to excite the RTD via the long lead wire. In addition, the variation in the lead-wire resistance disturbed by the change in the ambient temperature can also be compensated by using the proposed technique. The determination of the lead-wire resistance from the proposed procedure requires a simple computation method performed by a digital signal processing unit. Therefore, the calculation of the RTD resistance and the lead-wire resistance can be achieved without the requirement of a high-speed digital signal processing unit. The proposed procedure is implemented on two platforms to confirm its effectiveness: the LabVIEW computer program and the microcontroller board. Experimental results show that the RTD resistance was accurately acquired, where the measured temperature varied from 0<sup>◦</sup>C to 300<sup>◦</sup>C and the lead-wire resistance varied from 0.2 Ω to 20 Ω, corresponding to the length of the 26 American wire gauge (AWG) lead wire from 1.5 m to 150 m. The average power dissipation to the RTD was very low and the self-heating of the RTD was minimized. The measurement error of the RTD resistance observed for pt100 was within ±0.98 Ω or ±0.27<sup>◦</sup>C when the lead wire of 30 m was placed in an environment with the ambient temperature varying from 30<sup>◦</sup>C to 70<sup>◦</sup>C. It is evident that the proposed procedure provided a performance that agreed with the theoretical expectation.
dc.identifier.citationSensors, 22(11), 2022
dc.identifier.doi10.3390/s22114176
dc.identifier.issn14248220
dc.identifier.other2-s2.0-85131104102
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/13262
dc.sourceSensors
dc.subjectlead-wire compensation
dc.subjectlead-wire resistance
dc.subjectremote measurement
dc.subjectresistance temperature detector
dc.subjectthree-level pulse signal
dc.subjectvoltage-to-current converter
dc.titleA Procedure for Precise Determination and Compensation of Lead-Wire Resistance of a Two-Wire Resistance Temperature Detector
dc.typeArticle

Files

Collections

Research