Could the sensitivity of PT100 decrease over time due to prolonged use?
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According to the operators, the two thermistors used on the distillation tower to measure temperature differences are now far less sensitive than before. They believe this is due to prolonged use, as they have been in use for 10 years already. But as I understand it, as long as it can still measure temperature properly, there should be no problem. I wonder if this is the reason; please provide some information on this
The decrease in sensitivity should not be caused by prolonged use; if this occurs, please check whether the bushings, circuit cables, and other components have aged
After all, 10 years have passed, so it’s normal to have some errors. The terminal connections, as well as the connectors used for fastening, can age over time; even the cables can degrade. It is recommended that the person in question check the resistance values and inspect the connections.
The two thermistors used in the distillation tower to measure temperature differences are now far less sensitive than before; this might be due to prolonged use, with scaling or dirt accumulating outside the thermistor casings and thereby increasing their thermal resistance.
That kind of situation occurs over time; all products have a certain lifespan www.yibiaoshijia.com Technical articles on instrument information
The EJA430 transmitter does not have a handheld operator, and there is no display gauge inside the transmitter; is there any way to adjust the range?
It has been in use for 10 years, and it seems that the quality of the thermal resistor is quite good. However, over time it can oxidize. What’s more important is to check whether the pressure resistance of the thermal resistor sleeve is sufficient; this inspection must be carried out after the device is turned off. Otherwise, if the thermal resistor sleeve becomes corroded or worn through, it can pose a safety risk. If there is suspicion that the thermal resistance core is inaccurate, it can be removed for calibration. If no calibration equipment is available, a new thermal resistance core can be installed for comparison, thereby determining the quality of the original one.