2.8MPa (26-28atm). The oxygenation time shall not be less than 30 seconds. When the oxygen pressure in the steel cylinder drops below 5.0 MPa (50 atm), the oxygenation time should be appropriately extended.

5.1.3 Add enough distilled water to the inner cylinder to make the top surface of the oxygen bomb cover (excluding protruding oxygen valves and electrodes)

Submerged 10-20mm below the water surface. The water consumption during each experiment should be consistent with the calibrated heat capacity (with a difference of less than 1g).

It is best to measure the amount of water using the weighing method. If using the capacity method, temperature changes need to be corrected. Pay attention to proper tuning

Adjust the water temperature of the inner cylinder to make the temperature of the inner cylinder about 1K higher than that of the outer cylinder at the end point, so that the temperature of the inner cylinder at the end point is about 1K higher

To cause a significant decrease in the temperature of the inner cylinder at the endpoint. The temperature of the outer cylinder should be as close as possible to room temperature, and the difference should not exceed 1.5K.

5.1.4 Put the oxygen bomb into the inner cylinder filled with water. If there are no bubbles leaking from the oxygen bomb, it indicates good airtightness, i.e

The inner cylinder can be placed on the insulation frame of the outer cylinder; If bubbles appear, it indicates air leakage, and the cause should be identified and addressed

Correct and re oxygenate. Then connect the ignition electrode plug, install the stirrer and calorimeter, and cover the outer cylinder and lid. The mercury ball of the thermometer should be used to measure the temperature in the middle of the main body of the quasi oxygen bomb (excluding inlet and outlet valves and electrodes)

Both the meter and mixer must not come into contact with the oxygen bomb and inner cylinder* A regular thermometer should be hung at the exposed part of the mercury column near the calorimeter to measure the temperature of the exposed column.

5.1.5 Start the mixer, start timing and reading the inner cylinder temperature (t0) after 5 minutes, and immediately power on and ignite. Subsequent notes

Lower outer cylinder temperature (tj) and exposed column temperature (te). The temperature of the outer cylinder should be read at least 0.05K, and the temperature of the inner cylinder should be measured using a magnifying glass

Read to 0.001K. When reading the temperature, the line of sight, the center line of the magnifying glass, and the top of the mercury column should be at the same level,

To avoid the impact of parallax on the reading. Before each reading, the oscillator should be started to vibrate for 3-5 seconds.

5.1.6 Observe the temperature of the inner cylinder (note: do not extend any part of your body above the calorimeter within 20 seconds after ignition).