Self-Heating Effect of Platinum Resistance Thermometers on Measurement Results
In fluid measurement and control,temperature is a critical parameter that directly affects the density and viscosity of fluids.Platinum resistance thermometers are widely used due to their high precision and stability,but their self-heating effect can lead to measurement errors.This self-heating effect generates additional heat,causing changes in the temperature of the fluid,which in turn affects properties such as density,viscosity,and flow state.However,due to this self-heating effect,the thermometer may introduce errors during the measurement process.This article explores the mechanism of self-heating effect,particularly the Joule heating produced when current passes through the platinum resistance,and its impact on measurement results.It also delves into the selection of suitable platinum resistance thermometer models and the implementation of corresponding self-heating effect correction methods based on fluid characteristics.By understanding the properties of the fluid,choosing the appropriate thermometer model,and employing advanced compensation techniques,the impact of self-heating effect on measurement results can be minimized.
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维普
