Chapter 7. Temperature
Temperature is one of the most important parameters in process control. Accurate measurement of the temperature is not easy and to obtain accuracies better than 0.5° C great care is needed. Errors occur due to several sources, such as the sensor nonlinearities, temperature gradients, calibration errors, and poor thermal contact.
This chapter describes the temperature scales and the types of sensors and their comparisons.
7.1. Temperature Scales
The unit of the fundamental physical quantity known as the thermodynamic temperature (unit T) is the kelvin, symbol K, defined as the fraction 1/273.15 of the thermodynamic temperature of the triple point of water. Most people think in terms of degrees Celsius. The relation between ...
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