Week 3 - Thermal Sensors Assignment

Thermal Sensors Assignment

Work the problems below. To receive any credit, you must show all work. You may submit your work in a word processing document or in a pdf file. Graphic files are not acceptable submissions. Week3A_G00084731.

1.    What temperature in °F corresponds to 435K?

2.    What is the length of a copper rod at 420K, if the rod was 93m long at 10°F?

3.    Calculate the new volume for a silver cube that measures 3.15 ft on a side, if the temperature is increased from 15°to 230°C.

4.    What is the resistance of a platinum resistor at 480°C, if its resistance at 16°C is 110Ω? Assume the fractional change in resistance per degree of temperature at T_o is 0.00385.

5.    A type K thermocouple with an 85°F reference produces a voltage of 52.48mV. What is the temperature?

6.    A thermistor has a resistance of 16.33k ohms at 0.0°C, and it drops to 6.247k ohms at 20.0°C. This thermistor is used in a simple voltage divider circuit shown below. V_s= supply voltage = 5.0 V_dc, R_s = supply resistance = 10k ohms.

a.    Calculate the output voltage at 0.0°C.

b.     

c.    Calculate the output voltage at 20.0°C

d.    Assume the output voltage is 2.353 V. Estimate the temperature given the limited amount of data provided in the problem statement.