How the Intelligent Pressure Transmitter Controls the Pneumatic Control Valve
2020-09-10
Huai'an Huajiang Automation Instrument Co., Ltd Huai'an Huajiang Automation Instrument Co., Ltd three thousand five hundred and seventy-nine zero Core tip: intelligent pressure transmitter consists of intelligent sensor and intelligent electronic board. The intelligent sensor part includes capacitive sensor and measuring diaphragm detection circuit
Intelligent pressure transmitter It is composed of intelligent sensor and intelligent electronic board. The intelligent sensor includes capacitive sensor, measuring diaphragm detection circuit, temperature sensor and temperature compensation circuit; The intelligent electronic board part consists of a microcomputer controller and peripheral circuits, which are used to measure the pressure of liquid, gas or steam, and then convert the pressure signal into 4~20mADC signal for output. It can communicate with the HART manual operator to set, adjust the pressure range, monitor or form a field monitoring system with the upper computer, JSHJ-3851 intelligent pressure transmitter is widely used in the measurement and control system of weak corrosive liquid, gas and steam in industrial pipelines.
How the intelligent pressure transmitter controls the pneumatic control valve:
Method 1:
For example, your factory has used pneumatic target flowmeter in some high-temperature medium measurement, and its output is 20-100KPa pneumatic signal. Such signal is converted into 4-20mA current signal through the pressure transmitter, and then transmitted to the DCS in the control room. The 4-20mA signal of the control valve processed and output is transmitted to the pneumatic control valve side of the site through cable, The action of the pneumatic control valve is controlled by converting the electrical converter installed on the control valve or the electrical valve positioner into a pneumatic signal.
Method 2:
Adjust through PID regulator. In fact, just like the electrical signal, the pneumatic positioner is used in the positioner of the regulating valve to convert the control signal (kPa level of low pressure) output by the regulator into a high pressure signal (MPa level) that can drive the valve.
Huajiang Automation Can provide you with professional Intelligent pressure transmitter Model selection suggestions and reliable Intelligent pressure transmitter If you have any questions about the product, you can call 0517-86899908, and we will have professional technicians to help you. I hope we can help you!
