There's a serious RTD error, I'm sure someone will help. Currently, there are many RTD sensors installed in our factory. The transmitter is not used and the RTD resistance value is read from the IO card as it is. The problem is that sometimes the values of several sensors increase gradually over several hours. Touching the driver to the terminal of the marshalling cabinet or closing the knife switch again will return normal temperature. The same symptoms continued when the whole RTD sensor was re-tighting to find the cause, so I checked the terminal and found that the corrosion of the cable pin and terminal was seriously progressed due to cabinet humidity. We are preparing for a report, but we cannot explain the problem of returning to normal if we touch some tool as driver after a gradual rise or fall, or close the circuit after opening it. If you have any relevant evidence or explanation, please reply. You can send it by e-mail, please. I wish you good luck all the time.
Thank you
Thank you