Electrical and Computer Engineering



IMPORTANT - READ CAREFULLY: Lab questions are now broken into PRE-LAB, LAB, and POST-LAB components. Please go to the EE1305 website and read the lab procedure, and complete all of the PRE-LAB sections, BEFORE coming to the lab.PRE-LAB PROCEDUREPre-Lab - Question 1: What is thermistor sensor? How does it work?What is the formula to convert temperature from Kelvin to Celsius?CheckNOTE: For this week’s lab, you will break into teams of two or three to work together for the procedures portion of the lab. For the post-lab questions, you should complete them by yourself. Write the names of your team members here. Show this to the TA for a stamp. If you do not have your ADALM2000, you can follow along with the TA.CheckLab – Procedure 1: Follow the procedure 1 on the website to: Build the circuit shown in Figure 1 and fill the table below:Table.1: Voltage measurement when the thermistor is exposed to change in temperatureYou set the thermistor inVoltage (Volts)Room Ice waterBoiling waterShow this to the TA for a stamp.CheckLab – Procedure 2:Use voltage divider rule formula to calculate the value of resistance of thermistor and fill table.2.Table.2: Calculation of resistance of thermistor when the thermistor is exposed to change in temperatureYou set the thermistor inResistance of thermistor (?)Room Ice waterBoiling waterShow this to the TA for a stamp.CheckLab – Procedure 3: Rearrange the formula in equation.1 to express T as a function of R.R=10,000Ω × e-3977 (1298-1T)Write the expression for T as a function of R.Fill the table below. Please notice that T is temperature in unit of Kelvin (T in Kelvin is T in Celsius plus 273)Table.3: Temperature calculation when the thermistor is placed in room, ice water and boiling waterYou set the thermistor inTemperature (Celsius)Room Ice waterBoiling water Show this to the TA for a stamp.CheckLab –Procedure 4: Follow the procedure 4 on the website to: find the temperature of tap water using a curve fitting.Fill the table below.Measured voltage when you place thermistor in a cup containing tap water (Volts)Temperature of the solution (Celsius)Show this to the TA for a stamp.CheckPost- Lab – Step 1 Organize all of your Figures and tables neatly in your Word document. Figure caption is placed at the bottom while table caption should be placed on top of the table. For any figure you copy from website, please include reference number at the end of figure caption. Then cite to the website in Reference section of your report.Post- Lab – Step 2 What was the goal of this module?Post- Lab – Step 3 Explain which steps did you take to find unknown temperature of tap water in procedure 4?Post- Lab – Step 4 Turn this sheet in to the TAs for grading. Attach a copy of the Word doc with your Figures and answers. ................
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