Glass thermometer calibration is affected by various factors. Firstly, the quality and characteristics of the thermometer itself are important factors. Different brands and models of thermometers may have differences, such as their coefficients of thermal expansion and contraction, scale accuracy, etc.
Secondly, environmental factors also play a role. Environmental conditions such as temperature, humidity, and air pressure can affect the measurement accuracy of the thermometer. For example, in high - temperature environments, the thermometer reading may be higher; in a humid environment, the thermometer may be affected by moisture, resulting in inaccurate readings.
In addition, the operation method during calibration is also crucial. If the operation is improper, such as the temperature - sensitive part of the thermometer not being fully immersed in water, or the reading being taken with a non - horizontal line of sight, it may lead to inaccurate calibration results.
Another factor is the accuracy of the calibration equipment. The higher the accuracy of the calibration equipment, the more accurate the calibration result will be.