When using a calorimeter for an experiment, if there is no ignition, it will seriously affect the progress of the experiment. The following is a detailed analysis of the common reasons and investigation methods for the calorimeter not igniting.

Ignition failure

The ignition device is a key component of the calorimeter to achieve ignition. The ignition wire is aging, broken, or the ignition electrode spacing is improper, which may lead to ignition failure. After long-term use, the ignition wire is easily damaged due to oxidation and high temperature. At this time, it is necessary to replace the ignition wire in time. At the same time, check whether the ignition electrode spacing meets the requirements of the instrument. If the spacing is too large or too small, it can be adjusted appropriately to ensure that the ignition circuit can conduct normally and generate sparks to ignite the sample.

Oxygen supply problem

Adequate oxygen is a necessary condition for the sample to fully burn and successfully ignite. If the oxygen cylinder pressure is insufficient and the oxygen flow is too small, the sample will not be able to obtain enough oxygen to support combustion. Check the oxygen cylinder pressure regularly and replace the oxygen cylinder with insufficient pressure in time. In addition, the blockage of the oxygen pipeline will also affect the oxygen supply. Check whether the pipeline is bent or blocked. If there is a blockage, clean or replace the pipeline to ensure a smooth supply of oxygen.

The sample is in poor condition.

The quality and shape of the sample also have an important impact on the ignition effect. If the sample is damp, the moisture will absorb a lot of heat, lowering the sample temperature and making it difficult to ignite. Therefore, make sure the sample is dry before the experiment. In addition, too little or too much sample may also affect the ignition. If the sample volume is too small, the heat released by combustion is not enough to maintain the ignition; if the sample volume is too large, it may lead to insufficient combustion. It is necessary to control the appropriate sample volume according to the requirements of the instrument manual.

Instrument parameter setting error

The parameters of the calorimeter must be set accurately. If the ignition time, ignition current and other parameters are not set properly, the ignition device will not be able to ignite at the right time and with the right energy. Carefully check the instrument parameters, refer to the instrument manual, and adjust the parameters to the correct range to ensure the normal operation of the ignition program.

When the calorimeter does not ignite, it can be investigated from the above aspects. Through investigation one by one, accurately locate the problem and solve it in time to ensure the normal ignition of the calorimeter and ensure the smooth progress of the experiment.