A chemical tower has a liquid

Assignment Help Electrical Engineering

Reference no: EM13825307

In a processing plant, a chemical tower has a liquid which is vaporized. However, if the vapor in the tower reaches 150°C, an alarm needs to be generated so that safe shutdown of that system of the plant may be initiated. An RTD will be used to measure the temperature of the vapor. The RTD will generally operate between 80° to 175°C and has a resistance of 220? at 20°C. The fractional change in resistance per 1°C is 0.0040. The dissipation constant is 25mW/°C. Design a circuit to activate an LED alarm when the temperature reaches 150 °C. The error should not exceed +/-1°C. Use a single supply voltage.

-Draw a block diagram for your design. Explain the function of each block and why it is needed.
-Design the circuit showing all calculations. Choose standard resistor values, and specify the tolerances. Provide a drawing of your circuit with all resistor values and tolerances and parts. You may do this by creating it in Multisim and then drawing the values on as appropriate.
-Construct the circuit in Multisim using the resistor values you chose and tolerances. Do a screenshot showing how you have set up the tolerances for the resistors. For the RTD, you may use a potentiometer or variable resistor for which you can change the resistance for different temperatures. If you have a bridge circuit with a potentiometer for nulling, explain how you decide what resistance to use for the null.
-Create a table of temperature, RTD resistance, RTD resistance adjusted for self-heating, LED Status. Test your circuit, and use the table to display your results. Find the precise resistance and temperature at which the LED turns on. Provide several screenshots showing the resistance which reflects the RTD resistance value used in the circuit and the LED alarm. Which RTD resistance do you use in the circuit for testing?
-Put together all of the above in a well-written report including introduction, requirements, block diagram, design calculations, final design (including any potentiometer settings), testing (including which RTD resistance is used in the circuit for testing), and analysis of results. Be sure to provide a summary at the end, noting at which temperature the alarm was activated, if this was as designed, and what accounts for differences. Please note any problems you encountered.

Reference no: EM13825307

Questions Cloud

Working condition of airline baggage handlers : Who oversees the working condition of airline baggage handlers?

Would you sign this tax return-what potential ethics issues : John Haddock owns 75 percent of Haddock Corporation. The other 25 percent of the stock is held by John’s wife, Marsha. You are a tax manager assigned to prepare the corporate tax return for Haddock. Would you sign this tax return? Why or why not? Be ..

Round off to the nearest tenths place : Find the following for an input of 120 VAC(RMS), 60 hertz, given a 17:1 stepdown transformer, and a full-wave bridge rectifier. Rload is 120 ohms. Round off to the nearest tenths place. 4a: Primary or input peak voltage = 4b: Secondary peak voltage..

Manager prepares at merchandising and service company : The financial budget that a manager prepares at a manufacturing company is different compared to the financial budget that a manager prepares at a merchandising and a service company.

A chemical tower has a liquid : In a processing plant, a chemical tower has a liquid which is vaporized. However, if the vapor in the tower reaches 150°C, an alarm needs to be generated so that safe shutdown of that system of the plant may be initiated. An RTD will be used to measu..

Determine the present value of annuity : Monroe Corporation is considering the purchase of new equipment. The equipment will cost $37,900 today. However, due to its greater operating capacity, Monroe expects the new equipment to earn additional revenues of $6,000 by the end of each year for..

Receipts from case sales : A Company’s experience shows that 30% of its sales are for cash and 70% are on credit.An analysis of credit sales shows that 50% of credit sales are collected in the month following the sale, 45% are collected in the second month, and 5% prove to be ..

Lcd code microcontroller : Project: pic18f title: lcd code microcontroller: lcd write the code to perform the folling tasks: interface with lcd controller initialize the lcd clean the lcd initially display numbers and letters on lcd position the cussor within a non move to the..

Save the small town merchants : “Quite a few smaller stores have gone out of business during the time of Wal-Mart’s growth. Some people have tried to turn it into this big controversy, sort of a “Save the Small Town Merchants” deal, like they were whales or whooping cranes or somet..

User Account

All Pages