ECET-402 Lab1a Temperature Sensors & Controls

Temperature Sensors & Controls

Please complete this worksheet and submit to week 1 lab dropbox

This worksheet serves as coversheet

1.      From Part A, step 1(b) of lab instructions, change the temperature from 0 to 30° C and record the corresponding RTD resistance in Table 1.

2.      Graph the temperature-resistance characteristics of RTD below:

3. Is the graph obtained in step 2 above linear (a straight line)?

4. Use the graph obtained in step 2 above to determine the resistance of RTD at 75° F.

5. What is the value of resistor R1 found in Part A, step 3(f)?         

6. Paste your Multisim circuit from Part A, step 4 below:

7.    Briefly describe how the circuit above works:

8.  From Part A, step 6 of lab instructions, how would you modify the circuit so that the LED indicating an air-conditioning system is turned ON for temperatures of 68° F or higher?

9.    For the hardware experiment, we would like to set the threshold to 85° F instead of 77°F.  Describe how you would modify the circuit to achieve this goal. Would you increase or decrease the values of resistors? Which resistors?