In laboratory testing, the calorimeter is a key device for accurately measuring the calorific value of substances, but interruptions often occur during use, which seriously affects the detection efficiency and accuracy of results. The following is a detailed analysis of the common reasons for the interruption of the calorimeter and how to deal with it.

Equipment hardware failure

The failure of the hardware components of the calorimeter is the main factor causing the interruption. Ignition system failures are more common. The ignition wire is aging or broken, or the ignition electrode spacing is improper, and the effective spark cannot be generated to ignite the sample, resulting in the interruption of the experiment. In addition, the sealing problem of the oxygen bomb cannot be ignored. If the sealing ring of the oxygen bomb is aging or damaged, resulting in oxygen leakage and insufficient combustion, the experiment will also not be able to be carried out normally. Also, the failure of the stirring device, the stirring paddle card and the motor are damaged, the sample cannot be fully mixed with oxygen, and the heat transfer is uneven, which will also cause interruptions.

Operation process error

The irregular operation process is the artificial incentive for the interruption of the calorimeter. Inaccurate weighing of the sample, the quality of the sample exceeds the range of the calorimeter, or the weighing error is too large, which will affect the combustion effect and lead to the failure of the experiment. Improper loading of the sample, the sample is not completely placed in the center of the crucible, or the sample is spilled during the loading process, which will also interfere with the experimental process. In addition, improper control of the oxygenation pressure and time, insufficient oxygenation pressure or too short time, insufficient oxygen amount, the sample cannot be fully burned, and the experiment is naturally interrupted.

Environmental factors

Laboratory environmental conditions are crucial for the operation of the calorimeter. Excessive temperature fluctuations and unstable ambient temperature can affect the thermal balance of the calorimeter, lead to deviations in measurement results, and even cause the equipment to automatically interrupt protection. Excessive humidity and excessive ambient humidity may cause the internal circuit of the instrument to become damp, short circuit, poor contact and other problems, which may lead to equipment failure and interruption. At the same time, electromagnetic interference, the existence of strong electromagnetic fields around the laboratory will interfere with the electronic signal transmission of the calorimeter and affect the normal operation of the equipment.

Software and data issues

The software system and data processing of the calorimeter may also cause interruptions. Software program errors, vulnerabilities or program conflicts in the instrument software can lead to abnormal operation of the equipment, crashes, errors, etc. Data storage and transmission failures, insufficient storage space or poor contact with data transmission lines can make the experimental data unable to be stored and transmitted normally, resulting in experimental interruptions.

In view of the above reasons for the interruption, corresponding solutions can be taken. Regularly check the ignition system, oxygen bomb and stirring device, and replace the aging parts in time; strictly follow the operating specifications for sample weighing, loading and oxygenation; keep the laboratory temperature and humidity stable, away from electromagnetic interference sources; regularly update the software program, check the data storage and transmission lines. Mastering this knowledge can effectively reduce the interruption of the calorimeter and ensure the smooth development of the testing work.