Did the resistance at the lower tower drop by 4–5 KP suddenly?
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This post was last edited by you*n*nyou on 2011-9-3 20:50 while it was running. The lodging resistance drops sharply by 4=5 KP. Then what is the reason for the large fluctuations in the main cooling liquid level?
The backflow liquid at the bottom has decreased, so the resistance has dropped.
Check whether the liquid nitrogen return valve activated on its own. Also, check if there are any issues with the instruments. Let’s check if the resistance at the upper tower has increased as well; if so, the first possibility is more likely