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Uncertainty Analysis in Temperature Calibration
Source: | Author:Olivia | Published time: 2025-02-14 | 12 Views | Share:

In the process of temperature calibration, uncertainty analysis is a crucial part of evaluating the reliability of calibration results. Uncertainty is not a measurement error but a measure of the dispersion of measurement results. It reflects the degree of unreliability of measurement results caused by various factors.
There are numerous factors contributing to the uncertainty in temperature calibration. First is the uncertainty of the standard thermometer itself. Even a standard thermometer that has undergone strict calibration still has some uncertainty in its measured values. Secondly, the stability and uniformity of the calibration equipment can also introduce uncertainty. For example, if the temperature uniformity of a constant - temperature bath is not ideal, the temperatures at different positions may vary, which will affect the accuracy of the calibration results. Environmental factors during the measurement process, such as air pressure and humidity, can also affect temperature measurement and thus increase the uncertainty.
Taking the calibration of thermocouples as an example, during the measurement process, factors such as non - uniform thermocouple materials and unstable thermal electromotive force at the connection points will all lead to the generation of uncertainty. By quantitatively analyzing these factors and using statistical methods and relevant standard specifications, the total uncertainty can be calculated. Only when the uncertainty is within a reasonable range can the calibration results be highly reliable and provide reliable data support for subsequent production and scientific research.