The calibration of the Kaiyuan calorimeter is the core premise to ensure the accuracy and reliability of its measurement data. Whether it is daily testing or scientific research experiments, accurate calibration results directly affect the scientificity of the experimental conclusions. Below, I will introduce the calibration method of the Kaiyuan calorimeter in detail. The steps are clear and easy to see.

Step 1: Prepare for calibration

Before calibration, it is necessary to ensure that the calorimeter is in a stable operating state, the appearance of the instrument is not damaged, and the connecting parts are stable. At the same time, prepare standard materials that meet national standards and meet standards of accuracy, such as benzoic acid, whose calorific value needs to be certified by authoritative organizations and within the valid period. In addition, the ignition wire, oxygen cylinder, weighing paper, analysis day and other auxiliary tools should be prepared to ensure that the ambient temperature is stable, avoid strong wind and strong light, and create good conditions for calibration.

Step 2: Standardize the execution of the calibration operation process

1. Reference material weighing: Use an analytical balance to accurately weigh a certain quality of reference material, record accurate values, and the weighing process should be gentle to avoid spilling of reference materials and affect the accuracy of calibration.

2. Sampling and installation: Load the weighed standard material into the crucible, connect the ignition wire, ensure that the ignition wire is in good contact with the standard material, and then place the crucible smoothly into the oxygen bomb of the calorimeter, tighten the lid of the oxygen bomb, and ensure that the seal is leak-free.

3. Parameter setting and start-up: Turn on the calorimeter power supply, enter the calibration mode, set the relevant parameters according to the reference material information, and start the calibration procedure after confirming that it is correct. The instrument will automatically complete the ignition, measurement, data calculation and other processes.

Step 3: Data validation and adjustment after calibration

After the calibration is completed, the instrument will display the calibration result, which needs to be compared with the theoretical calorific value of the standard material. If the error is within the allowable range, the calibration is qualified; if the error exceeds the specified range, the operation process needs to be re-checked to check whether there are weighing errors, loose sealing of oxygen bombs, etc., and re-calibrated until the result reaches the standard.

Calibration precautions to keep in mind

During the calibration process, the operator should strictly follow the instrument instructions to avoid calibration failure due to illegal operations. At the same time, regular maintenance of the instrument should be carried out to keep the inside of the instrument clean and ensure the stable performance of core components such as sensors, laying a good foundation for subsequent calibration work.

Mastering the calibration method of the Kaiyuan calorimeter can not only improve the measurement accuracy of the instrument, but also provide a solid guarantee for all kinds of testing work. Follow the above steps to easily complete the calibration and keep the instrument in the best working condition.