122-28176 Parallax Inc, 122-28176 Datasheet - Page 201

• Manufacturer Part Number: 122-28176
• Description: GUIDE STUDENT PROCESS CONTROL
• Manufacturer: Parallax Inc

Specifications of 122-28176

• Accessory Type: Manual
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Propeller Education (PE) Kit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Chapter 6: Open Loop Continuous Process Control · Page 191
Figure 6-6 is a capture of the plotted data for this range. Doesn't look so good now, does
it? With the current resolution and span, the system can only resolve temperatures to
1.96 °F. This isn't very good for precise temperature monitoring and control.
Figure 6-6 ADC Byte Count vs. Calculated Temperature - Narrow Range
For better resolution the system needs to be modified to focus on the temperatures of
interest. One means to do this would be amplify the voltage before converting to a digital
value.