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Test steps for the gasoline calorimeter: 1. Prepare the water in the inner cylinder: Adjust the temperature of the water in the inner cylinder appropriately; generally, it should be kept about 1 K lower than the temperature of the water in the outer cylinder. This ensures that at the end of the test, the temperature of the inner cylinder is approximately 1 K higher than that of the outer cylinder. This adjustment is necessary when performing calibration or preparing parallel samples for heat value measurement. 2. Prepare the oxygen bomb: Secure the prepared ignition wire to the two ignition electrodes of the oxygen bomb to ensure good contact; the resistance value of the ignition wire is generally between 4 and 6Ω. 3. Carefully place the small cylinder into the sleeve, position the oxygen bomb steadily on the feet of the small cylinder, and gently close the upper cover so that the central electrode on the upper cover makes good contact with the head of the oxygen bomb; if not, this can be adjusted by changing the length of the central electrode screw. After adjustment, when the upper cover is pressed down, the circumference of the sealing ring should make even contact with the top surface of the square box. 4. Select the test type (calibration or measurement), enter the sample data, and start the test. For the entire testing process, please refer to the relevant content mentioned above. 5. Once the test is completed, the test results are displayed on the screen; when the printing option is set to “Automatic”, the test report will also be printed automatically. 6. Lift the upper cover, remove the small cylinder and the oxygen bomb; release air from the oxygen bomb, open it for cleaning, and prepare it for the next experiment. Technical features of the gasoline calorimeter: * It uses a single-chip microcomputer system to control functions such as automatic water filling, automatic temperature adjustment, automatic water dosing, automatic stirring, and automatic ignition, making operation simple. The user only needs to install the oxygen bomb and enter the relevant data, and the entire measurement process will be completed automatically. Measurements can be carried out continuously for a long time. A Chinese menu-based operation interface that is intuitive, user-friendly, and easy to learn and use. * Automatically tracks ambient temperature; no need to measure the water temperature of the outer tank. * Automatically measures and calculates the calorific value at high and low temperatures. * Equipped with a large-capacity electronic recorder to store up to 4,000 sets of data. * Has an internal water circulation system that automatically replaces water and measures its weight, thereby reducing human error. * Features a large LCD display with Chinese menu prompts, requiring no special skills from the operator. * Temperature measurement, ignition, mixing, process evaluation, result output, and data storage are all carried out automatically