Differential pressure remote water gauge should have pressure supplement function to ensure an actual indication of water line in the bubbles under all kinds of working circumstances.
差压式远传水位表应具有压力补偿功能，以保证各种工况下都能显示汽包中真实水位的变化。
2
In software, variable step strategy and actualdifferential PID are applied to meet the need of above two closed-loop controls.
软件上，分别使用了可变步长策略和实际微分pid算法，以满足上述两个闭环控制的需要。
3
Some special solutions derived from differential equations are discussed in greater detail and thereafter formulas approaching the actual movements of pump valves are given in this paper.