What need to know the thermocouple errors

Everyone knows only the correct use of thermocouple for, then we can obtain the correct temperature data, can also be good to save material and money, but if our installation is not correct, there will be in the corresponding errors, such as insulation and thermal inertia error and so on. The following HuiXin thermal meter is to tell us about the error of the thermocouple what are specific.

in general there are four kinds of error of the thermocouple, like poor insulation led to the introduction of the error and the error of thermal inertia is introduced into, thermal resistance, improperly installed into the error of the error. Let's respectively on the four errors are detailed understanding. Insulation is poor because of the introduction of errors caused the insulation of the thermocouple is broken, thus makes the insulation fault, at the time of high temperature is more serious, he will let thermal damage even there will be introduced.

the error of thermal inertia is introduced into, he said, referring to the measured temperature of corresponding change, at the time of rapid measurement his influence is obvious. We generally want to use when we use the better material of thermal conductivity, so it will take us in a measurement of unprotected bare thermocouple, but HuiXin thermal meter thermocouples are prone to damage.

thermal resistance error, when he was in the high temperature in there will be a layer of soot on protecting tube, the thermal resistance becomes big and impede heat transfer, so we have to ensure the neatness of thermocouple on the surface, reduce the error. Improperly installed into error, we cannot put thermocouple in a small test and flow are needed, so we should let the thermocouple to install according to the direction of flow. ( Figure/http://www. wuxiyibiao。 com)