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Process Instrumentation 1 (EIPRI1A) Project (Unit 3)Name the different types of thermocouples, also give their positive elements, their negative elements and their temperature ranges

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Process Instrumentation 1 (EIPRI1A)

Project (Unit 3)Name the different types of thermocouples, also give their positive elements, their negative elements and their temperature ranges. With the use of a sketch explain in detail the operation of a thermocouple in temperature measurement.                                                                                  (25)

2.            Compare the different types of thermocouples in terms of temperature measurement, stating which thermocouple can be used to measure very low temperatures, medium temperature and very high temperatures.                                (3)

3.            In detail explain Temperature Compensation as is used in temperature measurement, and also give the main benefits of using Temperature Compensation.                                                                                                                       (4)

4.            A Wheatstone bridge, with fixed resistors R1, R2 and R3, of 100 Ω and supplied from a 9 V battery, is used to measure a temperature of 100 °C with a platinum resistance RT, that has a resistance of 129.1 Ω at 100 °C . The thermometer is connected to the bridge with lead wires that have a resistance Rlead of 10 Ω at 20 °C and the thermometer is correctly calibrated for an ambient temperature of 20 °C. Assume that the lead resistance changes to 11 Ω when the ambient temperature rises to 30 °C.

          With the aid of sketches calculate the temperature error introduced at an  ambient temperature of 30 °C, when using a) the two wire method and b)   the three wire method.                                                                                                   (12)

NB:

To complete the Assignment please refer to your Process Instrumentation1 Unit 2 book.

You may also use other references to complete this Assignment