In the process of glass thermometer calibration, errors are inevitable. It is crucial to understand the sources of errors and adopt corresponding countermeasures.
The main sources of errors are: the error of the standard thermometer itself. Although it has a high accuracy, there is still a certain error; the insufficient temperature uniformity and stability of the constant temperature bath may lead to deviations in the ambient temperature where the thermometer is located; reading errors, such as parallax and inaccurate estimation.
For the error of the standard thermometer, the standard thermometer can be calibrated and traced to a higher accuracy regularly. For the problems of the constant temperature bath, select a constant temperature bath with reliable quality, good temperature uniformity and stability, and maintain and calibrate it regularly. To reduce reading errors, keep the line of sight perpendicular to the thermometer scale when reading data, and take the average value of multiple readings by multiple people.
Through the analysis and effective response to errors, the accuracy of glass thermometer calibration can be maximally improved, and the reliability of measurement can be enhanced.
