Problems with temperature measuring instruments

This post was last edited by zhoudingshengs on 2023-12-6 09:31. Thermocouple image:

1. Platinum-rhodium 10-platinum thermocouples are not suitable for operation in C-atmospheres, reducing atmospheres, or environments with corrosive substances. Such environments can corrode or damage the thermocouple, affecting the accuracy of measurements or causing the thermocouple to be destroyed. Therefore, option C is correct. 2. To measure the temperature difference between two points, two thermocouples of the same type can be connected in series in reverse polarity. Option D, platinum-rhodium 10-platinum, refers to the same type of thermocouple, and can therefore be used to measure the temperature difference between two points. Therefore, option D is correct. .

This post was last edited by zhoudingshengs on 2023-12-6 09:31. There are 8 types of thermocouple models: S, R, B, N, K, E, J, T. Wherein: R, B, S are the components of precious metals, with a fine wire diameter ； N, K, E, J, T are common metals with thick wire diameters. Common thermocouples can be divided into two main categories: standard thermocouples and non-standard thermocouples. A so-called standard thermocouple refers to a thermocouple for which standards specify the relationship between its thermoelectric potential and temperature, as well as the allowable errors, along with a unified standard scale; it also comes with accompanying display instruments available for use. Unstandardized thermocouples are inferior to standardized thermocouples in terms of range of use and quantity, and generally do not have a standard calibration table; they are mainly used for measurements in certain special applications.

This post was last edited by zhoudingshengs on 2023-12-6 at 11:47. There are 8 types of thermocouple models: S, R, B, N, K, E, J, T.