How to get a regulator signal for a temperature controller
First, in actual production, due to the various reasons for design (such as the energy calculation of the process, the instrument valve selection, etc.) may lead to certain measurements within the production device, at this time, the DCS operator will hold the valve Open or modify certain parameters, but this way may still be required.
For more intuitive, but inaccurate statement, the opening of the valve is 0 to 100% is corresponding to the controlled object 4 to 20mA (corresponding to its range), if the person is modified to modify the value of the controlled object, it may make the valve The opening is changed (seeing a counter-action), of course, the adjustment performance of the valve can achieve the best in a certain valve. When you modify www.china-natural.com
Enclosure Fan and Filter the parameters, it may make the valve adjustment parameters difficult, and when the valve opening is When the low, the fluid is a long-time flushing valve rod, which will reduce the life of the valve stem.
It is recommended that if its temperature does not meet the requirements, you can set itself to full open (or increase the chain, if the temperature is much lower than the control temperature, with 4 or 20mA to fully open the valve), or set the opening degree.