Temperature fluctuations occur from time to time in platinum resistance temperature measurement
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A PT100 sensor is used to measure the bearing temperature. Recently, there have been frequent fluctuations in this temperature, which later return to normal stable levels; this indicates that the actual temperature of the bearing remains unchanged. Guys, let’s discuss and analyze the possible reasons!
We encountered fluctuations in the bearing shell temperature on our centrifuge units; it was later determined that this was caused by the resistor being near failure. At that time, the wiring boxes and the connections throughout the DCS system were inspected, and even resistance measurements were taken, but no problems were found.
It is estimated that there is a poor connection in the platinum thermistor; it is recommended to replace it and see.
Is the connection at the pin becoming unstable? Try another one to see.
It is usually caused by poor contact; you can check and tighten each connection point to see if that helps.
It’s best to try replacing it with a new one to see if there are still any fluctuations
This situation is likely caused by poor contact of the leads; it is recommended to replace them when the vehicle is stopped
The junction box and shielded wires have been checked and no problems were found. It’s foreign-made equipment; they think it might be a sensor issue, and we’re waiting for spare parts now.
It’s fine to measure the resistance value under normal conditions; we’re waiting for spare parts now.
I haven’t checked the pin connections yet; I’ll take it apart to have a look once the spare parts arrive.
I also suspected this issue at first, but upon inspection it was found that the connection points were secure.