%0 Journal Article
%T Low Cost Signal Conditioning Technique for RTD Measurement.
%A Haresh A. Suthar
%A Jagrut J Gadit
%J International Journal of Nano Devices, Sensors and Systems
%D 2012
%I Institute of Advanced Engineering and Science
%R 10.11591/ij-nano.v1i1.454
%X RTD sensor resistances and temperature coefficients are relatively small. Lead wires with a total resistance as low as 10 ¦¸ and relatively high temperature coefficients can change the data acquisition system¡¯s calibration. The lead wire¡¯s resistance change over temperature can add to or subtract from the RTD sensor¡¯s output and produce appreciable errors in temperature measurement. Three-wire RTD measurement technique using a current source is widely used in industries for the measurement of RTD r¨¦sistance. The benefit of 3 wire RTD connection over the 4 wire RTD is one less lead wire. However, this connection assumes that the two current-carrying wires have the same resistance. Novel approach for the measurement of RTD resistance through 3-wire cancellation using software techniques with constant voltage source (instead of current source) is proposed and implemented successfully.
%K RTD
%K Voltage source
%K Current source
%K MUX
%K CPU
%U http://iaesjournal.com/online/index.php/IJ-Nano/article/view/454