Temperature Spec

The temperature system will:

1. Measure temperature

   1. Over the range of 0-70\(^{\circ}\)

   2. With accuracy of 0.5\(^{\circ}\)

   3. 4/5 sensors throughout bath

   4. Corrosion resistant

   5. Every 5 seconds

2. Convert signal (digital - mV (temp))

   1. With accuracy of 0.5 \(^{\circ}\)

3. Determine signal to send to heater

   1. Using set point and PI control

   2. Comparison of last 5 readings? (average? ignore anomalies?)

   3. Every 5 seconds

4. Signal to heater

   1. Using PWM

5. Heat solution

   1. Using PWM

   2. Using opto-isolator and transistor

   3. Max T of heating element \(\approx\) 100\(^{\circ}\)

The microcontroller will:

1. Take in data from ADC

2. Compare to set point

3. Use PI control as necessary to give out PWM signal to adjust temperature of heating element.