In instrument control, which one—level, temperature, flow rate, or pressure—tends to have more lag?
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For example: cascade control of level and flow rate, rather than single-loop control of the level; is the pure lag of the level large?
Among the four parameters, temperature lag is the greatest； In the example cascade loop, the liquid level lag is large ； If comparing cascade control with single-loop control, the single-loop control has greater lag.
Smart transmitters allow the damping time to be set, with values ranging from 0.3 seconds to 3 seconds; should this difference be taken into consideration?
What is cascade control? How do you implement cascade control? What exactly do you want to do?
Temperature, right? Automatic temperature control isn’t about differential control