【Daily Question 20090415】What types of failures have occurred with thermal resistors in field use, and how were they addressed?
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What types of failures have occurred with thermal resistors in field use, and how were they addressed? Format: Installation site: Fault symptoms: Cause of the fault: Solution: Pay attention to the posting format; original posts are encouraged. Spamming is not allowed. Original posts earn 10 points, while copied or spam posts result in a deduction of 10 points. This post was last edited by Mobei Yihai on 2009-4-14 20:59.]
Installation site: Oil processing complex. Fault phenomenon: Unstable performance and poor reliability of the temperature sensing resistor. Cause of the fault: Improper installation of the sensor; the wires at its base were not fixed to the same steel structure as the sensor. Solution: Fix the wires at the base of the sensor to the same steel structure as the sensor
Installation site: Heat exchanger for fermentation, equipped with two platinum resistance thermometers. Fault symptom: There is suddenly a large deviation in temperature. Cause of failure: There is a leak in the thermal resistor protective sleeve, allowing high-temperature material to enter at high temperatures. Solution: Fix the leakage.
Installation site: Temperature sensing thermoresistors for the trays of the T-410 dehydration and refining tower. Fault phenomenon: The temperature difference between the 13th and 15th layers is more than 15°C. Cause of the fault: One of the thermoresistors is out of spec and needs to be replaced. Solution: When the temperature difference between adjacent layers exceeds 15°C, compare the temperatures of the layers above and below; remove the thermoresistor from the 13th layer, which has a lower temperature, send it for inspection, and replace it with a spare thermoresistor promptly.
Installation site: Glue boiling tank for the preparation of papermaking auxiliary materials, with a single platinum resistance thermometer installed. Fault phenomenon: In the same area, there is a significant discrepancy between the readings obtained from platinum resistance thermometers and those from manual thermometers. Cause of failure: Poor thermal conductivity of the thermoresistor protective sleeve. Solution: Replace the thermoresistor protective sleeve