Preparation before verification: lay a solid foundation to ensure accuracy

Before calibrating the temperature of the calorimeter, it is necessary to be fully prepared. First, choose a suitable standard thermometer, whose accuracy must be higher than that of the calorimeter, and it has been metrological certified to ensure reliable data. At the same time, prepare a stable constant temperature medium, such as a constant temperature water tank or an oil tank, to ensure that the temperature is uniform and stable, and create a good environment for the calibration. In addition, clean the temperature probe of the calorimeter to remove surface dirt and impurities, so as to avoid affecting the temperature conduction, and lay a solid foundation for accurate calibration.

Verification core steps: standardize operation to improve quality

1. Instrument preheating and stabilization: Turn on the calorimeter and let it preheat for 15-30 minutes. After the various indicators of the instrument are stable, the calibration work is carried out to ensure that the instrument is in the best working condition.

2. Standard thermometer installation: Put the standard thermometer and the temperature probe of the calorimeter into the constant temperature medium together to ensure that they are at the same level and in full contact with the medium to avoid inaccurate temperature measurement due to position differences.

3. Temperature recording and comparison: Set the temperature of the constant temperature medium. After the temperature stabilizes, record the temperature values displayed by the standard thermometer and calorimeter simultaneously, and proceed in sequence according to different temperature points. Record each temperature point at least 3 times, and take the average value to improve the accuracy of the data.

4. Error calculation and adjustment: compare the temperature difference between the two. If the error is within the allowable range, no adjustment is required. If it exceeds the range, calibrate the calorimeter according to the instrument manual until the error meets the requirements.

Precautions for verification: details are controlled to prevent omissions

During the calibration process, attention should be paid to the stability of the ambient temperature to avoid large temperature fluctuations affecting the calibration results. Gentle action during operation to prevent collision of the instrument and affect its accuracy. At the same time, after the calibration is completed, the recorded data should be sorted out in time and the calibration report should be retained to provide a basis for subsequent instrument maintenance and calibration. In addition, regular calibration of the calorimeter is carried out to ensure that it remains in an accurate state for a long time, providing reliable data support for experiments and testing work.