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Unformatted text preview: I ntro The objective of the temperature section was to prepare a calibration curve for a thermistor, platinum resistance thermometer, and a copper-constantan thermocouple in a dry ice bath, ice water bath, boiling water bath and a liquid nitrogen bath and then find the time constant of a thermocouple in air and water. We conduct this experiment because accurate measurements are the most important requirement for chemical engineers. If we ignore proper temperature techniques, we could have poor results. In industrial instrumentation, the thermocouple is the most commonly used temperature sensor device because it has good inherent accuracy, wide range, relatively fast thermal response and it is very cost efficient. A discovery by T. J. Seebeck almost 150 years ago electric current flows in a closed circuit of two dissimilar metals when one of the two junction is heated, opened the way for modern thermoelectric circuitry. In 1831, Seebeck discovered that an with respect to the other. In such a thermocouple circuit 1831, Seebeck discovered that an with respect to the other....
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This note was uploaded on 11/15/2010 for the course CHEE 638 taught by Professor Hampton during the Spring '10 term at MO Southern.
- Spring '10