Signal Conditioning of RTD
Since RTDs are passive devices, there is some signal conditioning requirement of RTDs .Let us see the circuit diagram for the same.
RTDs require a current excitation source. This is necessary so that RTDs can measure voltage across the device. It is important that the current given is stable and in required range. Another important thing is linearization of the output. We know that the output of RTDs is not completely linear over all temperature ranges therefore it is necessary to perform linearization using some hardware like ground and a trigger system or maybe a software.
Another important thing for Signal Conditioning is wire configuration. RTDs can be used in 2, 3, and 4 wire configurations and before installing RTDs one must ensure a compatible system that can support the RTD. Above circuit is a sample configuration that performs signal conditioning of RTD sensor.
Resistance Temperature Detector or RTD
In the electronics industry, we often need to deal with measuring certain quantities with precision and accuracy. One such quantity is temperature. There are different methods that can be used for measuring temperature depending on the operation range, sensitivity, frequency response, ruggedness, and other electrical parameters. In this article we will study what is an RTD, and how it works. We will also study the characteristics of an RTD.
In addition to that, we will study the advantages and disadvantages of an RTD. To study the real-life use of RTDs, we will study the applications of an RTD. In the end, some solved examples and some practice questions are provided for a better understanding of concepts. The article concludes with a summary in the end and some frequently asked questions.
Table of Content
- RTD
- Construction
- Working
- Signal Conditioning
- Mathematical Equations
- Graph
- Characteristics
- Advantages of an RTD
- Disadvantages of an RTD
- Applications of an RTD