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1. The electromotive force E for a thermocouple is given by a). Calculate and sketch E for conditions in which the reference source is at 0°C and temperature varies from 0°C to 60°C. The thermocouple material is copper constantan with a = 38.7µVPC and b = 0.082 µV°C². How significant is the second term in your calculation? b). Calculate the sensitivity a at 37°C for the copper constantan thermocouple. (The thermoelectric sensitivity is defined by differentiating the above equation with respect to T.)

1. The electromotive force E for a thermocouple is given by a). Calculate and sketch E for conditions in which the reference source is at 0°C and temperature varies from 0°C to 60°C. The thermocouple material is copper constantan with a = 38.7µVPC and b = 0.082 µV°C². How significant is the second term in your calculation? b). Calculate the sensitivity a at 37°C for the copper constantan thermocouple. (The thermoelectric sensitivity is defined by differentiating the above equation with respect to T.)

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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1. The electromotive force E for a thermocouple is given by E = aT+bT a). Calculate and sketch E for conditions in which the reference source is at 0°C and temperature varies from 0°C to 60°C. The thermocouple material is copper constantan with a = 38.7µV°C and b 0.082 µV°c'. How significant is the second term in your calculation? b). Calculate the sensitivity a at 37°C for the copper constantan thermocouple. (The themoelectric sensitivity is defined by differentiating the above equation with respect to T.) 2. In a thermistor, the relationship between resistance R, and absolute temperature T in Kevin (K) is given by: R, = R,e(T,-T)/TT,) I dR, ). R, dT Please calculate temperature coefficient a (a is defined as a = 3. The empirical relationship between the thermistor resistance R and absolute temperature T (in Kelvins) is R, = R,eB(T,-T)/TT, ) where B is the material constant for thermistor; To is the standard reference temperature. If the resistance is 2000 2 at T-300 K, and 1447 2 at T=330K, what is the temperature when the resistance is 1700 2?
Transcribed Image Text:1. The electromotive force E for a thermocouple is given by E = aT+bT a). Calculate and sketch E for conditions in which the reference source is at 0°C and temperature varies from 0°C to 60°C. The thermocouple material is copper constantan with a = 38.7µV°C and b 0.082 µV°c'. How significant is the second term in your calculation? b). Calculate the sensitivity a at 37°C for the copper constantan thermocouple. (The themoelectric sensitivity is defined by differentiating the above equation with respect to T.) 2. In a thermistor, the relationship between resistance R, and absolute temperature T in Kevin (K) is given by: R, = R,e(T,-T)/TT,) I dR, ). R, dT Please calculate temperature coefficient a (a is defined as a = 3. The empirical relationship between the thermistor resistance R and absolute temperature T (in Kelvins) is R, = R,eB(T,-T)/TT, ) where B is the material constant for thermistor; To is the standard reference temperature. If the resistance is 2000 2 at T-300 K, and 1447 2 at T=330K, what is the temperature when the resistance is 1700 2?
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