Temperature Measurement and Control

These are documents and circuits which will help learn Basic Temperature closed loop control, There are many ways to control temperature.

• ON-OFF Hysteresis or Dead Band Control.
• Proportional Control with Reset.
• Full PID Control, Manual and Auto Tune.

The first one is an electronic emulation of Thermostat or Electro-Mechanical Controls. The second is a Time-Proportional like a slow PWM. The third is the complete adaptive control.

While the first is like a limit switch, the second works like a SMPS, the third PID takes into account the speed of the process and dynamic changes or disturbances of the system and compensates in real time.

Example – In a Oven, one batch may have 100 metal boxes to heat, the second batch may have 10 boxes, the door may be frequently opened and the mains power (heater) may be fluctuating. A system that is able to adapt to these changes, without much readjustments is the objective of an ideal process control. The Accuracy and the Energy efficiency being the most important.

• Temperature Measurement and Control
• Industrial Process Control Circuits
• Design of a Thermocouple Amplifier
• Design of a ADC Interface for Microcontroller
• Process Control Circuits
• Process Control FAQ
• Instruction manuals
• Process control Production notes

Process control Application notes

• Temperature control in plastic injection molding
• Cooling Temperature Control
• Capacitor Temperature Monitor

Documents

• Calibration and testing of a proportional controller
• Modification or additions for STC1000
• Production Checklist of STC1000
• Input Levels for Thermocouples and RTD Pt-100
• Calibration report of a proportional controller