How is this control carried out?
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The foreigner’s diagram shows squinting eyes; could everyone please explain how these two are interlocked? Thank you.
From a process perspective, it seems that after two minutes of activation, the level switch signal remains at 0. What is this for? When the valve is opened for two minutes, should there be a change in the liquid level inside the tank?
It should be that if the switch is at zero, the valve will operate after 2 minutes.
I immediately understood that —————— it should be that the valve opens after another 2 minutes when there is no liquid level in the tank. Is that correct? German stuff, low liquid level control.