Temperatiu lastrumantation Workbook Text Reference Pages 43-73 uestion ELECTRICA

Question

Temperatiu lastrumantation Workbook Text Reference Pages 43-73 uestion ELECTRICAL THERMOMETERS Name Date 1. is the process by which thermocouples gradually change their voltage- temperature curve due to extended time in extreme environments A. The Seebeck effect B. Thermocouple aging C. Resistance bridging D. The Peltier effect 2. Ttoined end of the thermacouple that is exposed to the process where the temperature measurement is desired. A. hot junction B. thermometer C. cold junction D. isothermal block A(n)--res suance bridge has fixed resistances and the voltage across the bridge is proportional to the temperature of the variable resistance 3. device. TF4. A Seebeck voltage cannot be measured directly F 5. A thermocouple junction is a point where the two dissimilar wires are joined. 6. Theis a theruoelectric effect where heating or cooling occurs at the junctions of two dissimilar conductive materials when a current flows through the junctions TP7. Shunt impedance is a circuit that is used to precisely mcasure an unknown resis- is a circuit that has more than one point connected to the earth ground. tance s. Ain) with a voltage potential difference between the two ground points high enough to produce a circulating current in the ground system. 9. is the process of using automatic compensation with a thermocouple to calculate temperatures when the reference junction is not at the ice point. 10. Ain) is an electrical thermometer consisting of several thermocouples connected in series to provide a higher voltage output. A. coid junction compensution B. ground loop C thermopile D. RTD 27

Explanation / Answer

1.The Thermocouple aging is the process by which thermocouples gradually change their voltage-temperature curve due to extended time in extreme environments.

2.The hot junction is the joined end of the thermocouple that is exposed to the process where the temperature measurement is desired.#In the thermocouple the hot junction is for the measurement purpose and the cold junction is for reference temperature.

3.A(n) Thermopile is an electrical thermometer consisting of several thermocouples connected in series to provide a higher voltage output. #It is an electrical thermocouples connected in series to get higher voltage output than that of the thermocouple.

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