What A Temperature Controller Is And How It Works


Posted September 14, 2020 by melriya

A temperature controller is a device that is used to control temperature.

 
A temperature controller does this by first measuring the temperature (process variable) it then compares it to the desired value (set value). The difference between these values is known as the error (deviation). Temperature controllers use this error to decide how much heating or cooling is required to bring the process temperature back to the desired value. Once this calculation is complete the controller will produce an output signal that effects the change required. This output signal is known as the (manipulated value) and is normally connected to a heater, control valve, fan or some other "final control element" which actually injects or removes heat from the process.

Temperature controllers form one of the four parts of a temperature controlled system. To help visualize this we will consider an oven. The four parts would be :

1. The oven
2. The heater
3. The thermometer (or thermocouple)
4. The controller

The role of the temperature controller is to measure the temperature on the thermocouple of the panel view repair, compare it to the set point and to calculate the amount of time the heater should remain switched on to maintain a constant temperature.

Many factors change the amount of time that the heater needs to on, to maintain the process temperature. For example the size of the heater, the size of the oven, the amount of insulation surrounding the oven and the ambient temperature will all change the rate at which the oven will heat up or cool down.

At the end of the day a temperature controller replaces the function of a person whose job description would read something like:-

Watch that thermometer
Keep the temperature stable at 80Deg C
If we need more heat, switch on the heater.

The important point is that the temperature controller has one input, one output and one set point.

Contact detail

Name: Melriya Technical Solutions, LLC
Address: P.O. Box 127131, Office 206, Abu Ghazaleh Building, Al Quoz, Dubai, U.A.E
Phone: +971-4-3791970
Fax: +971-4-3791971
Email: [email protected]
Website: www.melriya.com    
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Contact Email [email protected]
Issued By Melriya
Country United Arab Emirates
Categories Electronics
Tags panel view repair , temperature controller
Last Updated September 14, 2020