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该电路利用电接点压力表作为传感器把液位高低转换成压力信号,利用电接点再把压力信号转换成电信号对液位进行自动控制。电接点压力表兼作调节器,该电路属于具有中间区的双位调节系统,其控制电路如下:其中 M 为三相异步电动机,P 为电接点压力表,KM 为交流接触器,1KA,2KA 为继电器,1S,2S
The circuit uses the electrical contact pressure gauge as a sensor to convert the level of liquid pressure signal, the use of electrical contacts then the pressure signal into electrical signals on the level of automatic control. The electric contact pressure gauge doubles as a regulator. The circuit belongs to a double-position regulating system with a middle zone. The control circuit is as follows: wherein M is a three-phase asynchronous motor, P is an electric contact pressure gauge, KM is an AC contactor, Relay, 1S, 2S