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Calorimeter ignition failure is mainly due to the ignition line is not connected, poor contact or short circuit. When the test shows that the ignition has failed, check the oxygen bomb and first check if the ignition wire is short. First, use a multimeter to measure whether the two ignition electrodes on the oxygen bomb are conducting. If the line still fails, most of the two electrode columns are rusted and rusted, causing poor conductivity. At this time, two electrode columns are applied with sandpaper, especially The parts where the ignition wire is connected are polished to make contact.
The use of calorimeters found some of the common causes of ignition failures and treatment measures.
Ignition failed, the line was blocked or poorly contacted, check whether the connection was connected, whether the oxygen warhead was in contact with the ignition cap, and whether the oxygen bomb inner cylinder was in place.
The sample was wet and oxygenated splashed the sample too quickly.
The ignition wire or the cotton wire was badly contacted with the sample and reloaded.
Both electrodes are dirty and the electrodes are ground with sandpaper.
The ignition cap is oxidized and the ignition cap oxide is polished with sandpaper.
The two electrodes are short-circuited to the crucible (it is easy to burn the crucible and the electrode). Replace the electrode or crucible and re-load the sample...
First, first check whether the sample has been burned, if it has been burned, it is usually called false failure. The reason may be:
1. Stirring motor bad 2. Stirring motor shaft and stirring fixing screw loose, causing the motor to turn, the stirring rod does not turn 3, The screw of the fixed stirring blade is loose, the lever rotates, the blade does not turn 4. The platinum resistance of the probe moves to the probe In the middle or upper part 5. The probe is not inserted in the inner barrel (computer calorimeter)
6, the ignition board fails, the test is started at the beginning of ignition (not yet to the ignition when the sample has been burned)
7, the probe and temperature measurement card connection is not good, or the probe line has a broken place, or the probe is bad 8, the temperature measurement card is bad, if the ignition wire has been blown, and the sample is not burned, or the ignition wire melted in benzene In formic acid, but benzoic acid is not burned, the reason may be:
1. The ignition wire is not tied tight 2. The ignition wire is too far from the sample 3. When the oxygen is being oxygenated, the sample is wetted 3. If the ignition wire is not blown, the lid is opened and an ignition wire is bundled in two. On the ignition electrode, run the program. Click on the ignition button in the hardware debugging to see if the ignition wire is blown.
A: If the ignition wire is blown, the cause of the ignition failure is generally the connection of the ignition electrode and the oxygen bomb or the oxygen bomb itself. The possible causes are:
1, the ignition electrode surface has an oxide layer, so that the contact resistance is too large 2, the oxygen bomb cover has an oxide layer, so that the contact resistance is too large 3, the connection spring elasticity of the ignition electrode is not enough 4, the fire shield and the electrode in the oxygen bomb Rod short circuit 5, ignition wire is not tied 6, the connection of oxygen bomb itself is not connected well B: If the ignition wire is not blown, then there is a problem between the control part and the ignition electrode. Possible reasons are:
1. Ignition electrode in the drum cover interlayer interrupted or short-circuited 2, the ignition board damaged, and the air inlet plugged to cause ignition failure.
The calorimeter fails to fire several times in succession and cannot perform normal tests. Open the cartridge inspection and found that the ignition wire has been properly blown, but the sample packaging paper was soaked in water, there is no normal combustion, and the fire damper and cartridge cover have water marks. After checking the airtightness of the cartridge, replacing the sealing ring, and verifying the airtightness of the instrument, the ignition failed. After careful observation, it was found that one of the two intake holes on the valve joint of the cylinder cap was blocked by the combustion residue, and the other was also very small, so that when the oxygen bomb was inflated, the pressure was too high and the airflow was too fast; On the one hand, unbalanced air intake on both sides will blow water from the cartridge (used to absorb the burned acidic oxide) to wet the sample. After the air intake hole is cleared, the ignition is successful and the test is normal.
Although the calorimeter is currently the most popular product on the coal quality instrument market, it will inevitably also have some minor faults, such as a situation in which the user of the calorimeter reacts to ignition failure. Actually, if the customer is on the calorimeter How to work If you understand the details, the problem is not difficult to solve.