Low Cost Signal Conditioning Technique for RTD Measurement
| Autor: | Jagrut J. Gadit, Haresh A. Suthar |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Engineering
business.industry Electrical engineering Hardware_PERFORMANCEANDRELIABILITY Current source Multiplexer Temperature measurement Data acquisition Hardware_INTEGRATEDCIRCUITS Electronic engineering Calibration Resistance thermometer Voltage source business Signal conditioning Hardware_LOGICDESIGN |
| Zdroj: | International Journal of Nano Devices, Sensors and Systems (IJ-Nano). 1 |
| ISSN: | 2089-4848 |
| Popis: | RTD sensor resistances and temperature coefficients are relatively small. Lead wires with a total resistance as low as 10 Ω 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 resistance. 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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