An improved lead resistance compensation technique for use with three-wire resistance temperature detectors (RTD) is presented. The present practice of using the three-wire concept in an un-balanced bridge to provide signal to direct reading instruments produces nearly 1% error for a lead resistance as low as 1 Ω. In contrast, the new method limits the error to below 0.1% with much higher lead wire resistances. © 1999 IEEE.

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University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

An improved lead compensation technique for three-wire resistance temperature detectors

IEEE Transactions on Instrumentation and Measurement

An improved sensitivity enhancement technique for strain and temperature measurement has been presented. In the present work, the conventional Wheatstone's bridge has been modified using active devices for enhancement of sensitivity by twelve times. It can also measure incremental resistance precisely and linearly. Experiments have been carried out for validation of the proposed circuit for both strain gauge and RTD and results showed that the maximum error was limited to within ± 1.5% for either case. The proposed circuit is very low cost and involves a few active components. The theory of the proposed circuit has been established and then validated with conventional half bridge circuit for both strain and temperature measurement. The experiments were conducted with strain gauge sensor for strain measurement and a Pt-100 RTD sensor for temperature measurement. The results obtained show that the output of the circuit is almost twelve times than the conventional half bridge circuit. © 2015 IEEE.

Proceedings of the 2015 3rd International Conference on Computer, Communication, Control and Information Technology, C3IT 2015

A novel sensitivity enhancement technique employing wheatstone's bridge for strain and temperature measurement

A new lead wire compensation technique is presented for conventional two wire resistance temperature detectors (RTDs). Existing two wire resistance temperature detectors generally use bridge balance methods, where the two lead resistances introduce appreciable error in measurements due to environment temperature variations. The presented technique considerably reduces the effects of such lead resistances and can accommodate temperature variations that the lead wires may be subjected to in industrial environments. © 2006 Elsevier Ltd. All rights reserved.

Measurement: Journal of the International Measurement Confederation

An improved lead wire compensation technique for conventional two wire resistance temperature detectors (RTDs)

Direct resistive sensor interface to a microcontroller has several advantages but has one prominent disadvantage, namely, the measurement is affected by the resistances of: 1) wires that connect the sensor to the port pins and 2) the internal resistances of the port pins of the microcontroller. A direct sensor-to-microcontroller interface scheme that compensates the effect due not only to resistances of lead wires but also the effect of microcontroller port pin's internal resistance and any offset present in those pins is presented in this paper. Since the resistances of lead wires are compensated, automatic temperature compensation (temperature effect of lead wires) is also obtained. Simulation study and results obtained from a prototype built and tested establish the efficacy of the proposed method. A maximum error of 0.06% was observed from the prototype developed, when it was tested under room temperature, after interfacing it with the sensor Pt100, with a lead wire resistance RLD = 21Ω. The error increased to a maximum of 0.08%, when the RLD varied from 0 to 100Ω When the same prototype was tested under elevated room temperature of 30 °C to 100 °C, the maximum error observed was 0.18%. © 2017 IEEE.

Journal	Data powered by TypesetIEEE Transactions on Instrumentation and Measurement
Publisher	Data powered by TypesetIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
ISSN	0018-9456