Thermocouples and their degradation lives with the so-called thermocouples, which degrade and we use the aging phenomenon. Thermocouples, at high temperatures, gradually increase the grain's internal metal or alloy composition. With a small amount of alloy, you also change position and shape, and then react to the surrounding environment, reducing or oxidizing impurities in the gas. Even the above changes with thermocouple thermoelectromotive force (EMF) will be very sensitive to thermal degradation phenomena. Inevitable changes. Thermocouple life-deteriorating thermocouples. Thermocouples, diameter, temperature, and atmosphere are difficult to quantify, and time will vary. More tolerant, the degradation life of thermocouples cannot be used to further grow to disconnection. The life of a thermocouple assembly Our standards require only thermocouple stability. It provides before and after temperature thermoelectric 200H power supply change. However, you do not specify a useful life. In Japan, on the basis of life, (C-1602-1995) Japanese JIS standard thermocouple thermocouple is used continuously. B, R S type thermocouple, thermocouple type T 2000H, potassium, electron, J, 10000H. In actual use, the thermocouple assembly is usually a bare wire protection tube, only in special cases. Therefore, in most cases, the life of the protection tube is determined by the thermocouple life. The judgment of the actual life cycle of the thermocouple must be accumulated over a long period of time. The actual use of the data in the state is to provide [5], and more accurate results, it becomes possible for you.
The world of the living surface of the thermocouple sheath blight is cut off the sheath of the thermocouple sleeve to protect the shadow of the life of the thermocouple sheath, loud sound from the shell material metal shell, thermocouple wire, you will choose according to different application needs . If a material has been selected, its lifespan increases with increasing diameter of the thermocouple jacket. There are many advantages, but life tends to be lower than thermocouple assembly, compared to thermocouple jackets in the same assembled thermocouple. Thermocouple temperature sensor manufacturing, scientific research is the most commonly used structure is very simple, I do not pay attention to measurement errors that have not yet become significant. In order to use a simple question, the authors point measurement, thermocouple insertion depth, response time, selection of thermal resistance, thermal radiation and the main reasons for errors are discussed in detail. Thermocouples point out that this is uneven, air, insulation resistance, selection Sexually oxidized and K-type thermocouples, it uses thermocouples with status and shunt faults.