Graph of Behaviour of RTD
Let us now study how will the graph of various metals that make RTD look like when draw. Here we will plot a graph with resistance on y axis and temperature on x axis for metals like Copper, Nickel and Platinum. This graph is called resistance-temperature characteristics graph.
From the above graph, we can see that platinum has a range that goes till 6500C whereas the range for copper is 1200C and nickel is 3000C. We can derive at the result after calculating some slopes of the graph that for every degree change in temperature (in Celsius) , the resistance of platinum shows and increase of 0.4 ohm. It is also important to notice that the shape of graph will change depending on the metal as it will change the value of constant α in equation ( α is metal-dependant).
This is how we can assess the linear nature of various metals that make an RTD over a range of temperature.
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