Thermocouple in the measurement process, has shown a high accuracy, but in the actual work, we still need to improve its stability as much as possible. Nowadays, thermocouple has become a very wide range of temperature measurement elements, and also has good economy. However, in the measurement process, we have to consider the stability of the problem, let's take a look at the specific content.
In fact, if its stability can be reasonably controlled, it will undoubtedly be able to greatly improve its performance. However, in actual use, due to the existence of certain errors, such as temperature difference, climate difference, etc., the temperature of thermocouple will change to a certain extent, and often changes with the diameter. In some cases, even if the diameter is the same, if the structure is different, there will be a big difference.
Therefore, in order to reduce the impact as much as possible, we need to consider these aspects in advance when choosing thermocouple. Here, we suggest that we should consider it according to the actual situation. The main conditions to be considered are: common temperature and use temperature; redox atmosphere; anti vibration performance, etc.
Of course, for different types of thermocouples, the influence of factors will be different. Its structure and material will also have a certain impact. Therefore, we need to be familiar with the physical and chemical properties of various protective tube materials. For example, in the powder metallurgy industry, molybdenum tube is commonly used as a protective tube, which can still maintain good use effect under very high temperature conditions.
In short, if we need to ensure the stability of the thermocouple, then we have to consider from the above aspects, only by doing these can we improve the stability of the thermocouple.
On 2018-08-08 11:45:46
