In the calibration work of glass thermometers, mastering the key technical points and implementing strict quality control measures are the core to ensure the accuracy and reliability of the calibration results.
From the perspective of technical key points, the stability of temperature transfer is crucial. When using a constant temperature bath for calibration, the performance of the constant temperature bath directly affects the stability of temperature transfer. For example, high - end constant temperature baths use advanced temperature control technology to keep the temperature fluctuation within a very small range, which is essential for calibrating high - precision glass thermometers. At the same time, the full heat exchange between the thermometer and the medium in the constant temperature bath cannot be ignored. Ensure that the temperature - sensing part of the thermometer is completely immersed in the medium and has sufficient equilibrium time to enable the thermometer to accurately reflect the set temperature of the constant temperature bath.
In terms of quality control, first, the calibration equipment should be regularly verified. As the benchmark for calibration, the accuracy of the standard thermometer directly determines the reliability of the calibration results. Send the standard thermometer to a qualified metrology institution for traceability calibration according to the specified cycle to ensure that its error is within the allowable range. In addition, the monitoring of calibration environmental conditions is also essential. Factors such as environmental temperature and humidity will affect the calibration process. By installing temperature and humidity monitoring equipment, the environmental parameters are recorded in real - time. Once it is found that the environmental conditions exceed the specified range, the calibration work is immediately stopped.
In the actual calibration operation, the skill level and operation standard of the operators also affect the calibration quality. Regularly organize operators for training to make them proficient in calibration techniques and operating procedures, and strictly follow the standard operating procedures for each calibration step, from the insertion of the thermometer, reading to data recording, to ensure accuracy. Only by comprehensively controlling technical key points and quality control can high - precision calibration of glass thermometers be achieved.
