The remote level gauge of the material tank has suddenly become inaccurate. What’s going on?
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The raw material tank is equipped with a differential pressure transmitter that displays the liquid level on the DCS; recently, it has started to give inaccurate readings, with values that are significantly too high and drifting. I opened the transmitter and saw that water was inside; I used a hair dryer to dry the water and also dealt with the oxidation at the wiring connections, but it still didn’t work. What on earth is going on? Please ask a instrumentation professional to answer. Thank you!
You need to calibrate the transmitter and give it a try
I also recommend having it calibrated once. There’s no responsibility for safety
Do you mean it’s still caused by moisture, and I just need to take the transmitter inside apart and dry it out? Should the entire thing be placed in the oven, or just the circuit board?
Even a slight leak in the pressure guide tube on the negative pressure side can cause the values to be too high
We are using a single-flange design; does the situation where \"a slight leak in the pressure guide tube on the negative pressure side causes higher values\" also occur? So what should be done?
Thank you for answering the questions! Unfortunately, the contents in the tank couldn’t be emptied, so it wasn’t possible to remove it entirely; thus, I had to try using a hair dryer again to see what would happen.
Does the instrument not have a root valve? It’s basically impossible to dry this with a hair dryer, and moreover your hair dryer may not be explosion-proof; it’s better to be careful on site. If there is no drying equipment, it is recommended to air-dry it for 1–2 days; once it is completely dry, power it on for testing and perform zero calibration. If it still doesn’t work well, send it back to the factory……
Does the instrument not have a root valve? It’s basically impossible to dry this with a hair dryer, and moreover your hair dryer may not be explosion-proof; it’s better to be careful on site. If there is no drying equipment, it is recommended to air-dry it for 1–2 days; once it is completely dry, power it on for testing and perform zero calibration. If it still doesn’t work well, send it back to the factory……