Could someone please explain how the PH adjustment in the diagram below is interlocked with the flow rate and the PH meters at the front and back?
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Could someone please explain how the PH adjustment in the diagram below is interlocked with the flow rate and the PH meters at the front and back?
The OH-10540 pipeline is connected to the alkali pump, and the pump should be a variable-frequency positive displacement pump. Selection can be made using the selector switch IS; the amount of alkali to be added is calculated through the flow meter S109 and the pH meter S102. Alternatively, use the pH meter S101 to adjust the amount of alkali added.
This one is more advanced; it even includes basic formula calculations
This one is more advanced; it even includes basic formula calculations
This is not a standard logic diagram; it’s not possible to tell from the diagram how it is controlled. Experienced people can determine the control method based on their experience by looking at the diagram.
If you could send a screenshot of the complete PID diagram, it would be easier to understand~ This control mechanism may also calculate the required S109 flow rate based on the pH difference between two points, and use that flow rate value to control the output of the variable-frequency pump