Calorimeter Frequently Asked Questions and Maintenance

1. Common Faults and Causes Symptoms Causes Handling 1. Oxygen gas leaks: Aging or wear of rubber seals, replacement of seals 2. Ignition failure: 1. Lines are not connected or are in poor contact 1. Check whether the connection is connected, the oxygen warhead is Whether the ignition cap is in good contact or not, and whether the oxygen bomb is in place. 2. The sample is wet. 2. The oxygen is splashed too quickly. 3. The ignition wire or the cotton wire is in poor contact with the sample. 3. Reload the sample. 4. The two electrodes are dirty. 4. Grind the electrode with sandpaper 5. Ignition cap oxidation 5. Grind the ignition cap oxide with sandpaper 6. The two electrodes are short-circuited to the crucible (this will easily burn the crucible and the electrode) 6. Replace the electrode or crucible and reload the sample 3. Burn the sample Incomplete sample is not flammable. Oxygen is not sufficient or the oxygen pressure is insufficient. Use mirror paper to wrap the sample to prolong the oxygenation time. Replace the oxygen cylinder. 4. After the ignition, the humidity rises too high and the calorific value is too high. 1. The stirrer does not turn. The stirring shaft is stuck and the line is blocked. 2. The stirring blade is falling off. 2. Insert a cotton thread into the nylon rod hole connected with the stirring shaft and re-plug it. 5. The test temperature is not over for a long time. The external cylinder temperature is basically the same as the room temperature. Or reduce the indoor temperature 6. Oxygen leakage oxygen in the seal aging or wear Routine maintenance and inspection of sealing ring 2 The following inspections and maintenance should be performed frequently after the end of each day's test, so that the instrument can always maintain a good working condition and can prolong its service life. 1. Oxygen bomb: cleaning of oxygen bomb after each test In addition to drying, the following points should also be noted and inspected:

(1).Oxygen bombs can only be twisted by hand. When the hand feels resistance, it should be stopped. Never try to use a hard twisting tool. After each test is completed, it should be cleaned.

(2).Bombs and seats should be flushed and wiped dry after use.

(3). The cup is rinsed, the thread is scrubbed, and check the bullet cup for mechanical damage. Be careful not to invert the cup.

(4). Check whether the seal ring is worn and burned. If the leak is not tight, it should be replaced.

(5). Check whether the insulation pad and insulation cover are in good condition, whether damaged or not, and check the insulation performance periodically.

(6) Periodically conduct a 20.0Mpa hydrostatic test on the oxygen bomb. After each hydrostatic test, the oxygen bomb must not be used for more than one year (or no more than 5000 tests).

2. Heater tube: After the test, the water in the tube should be drained to the outer tube, wiped dry and kept clean.

3. Test water: The best is pure water, and it should be replaced regularly to ensure the test reliability and success rate.

Note: In order to use the system safely, the computer equipment must be reliably grounded.