Hi everyone-
i am attempting to go bonkers and modulate the flow rate of my wort through the plate chiller so I can get to a specific wort temp directly into the fermentor as fast as possible. I know there are actuated valves that are more than just open or closed, but can be opened to variable degrees by applying a varying voltage.
The only question is this- all the PIDs that i know output a digital on off signal to an SSR or a contactor, which would not allow control of these valves. Does anyone know where I could get a relatively cheap PID that has analog output (preferably 0-10 volts)? I have seen one that is quite cheap that can put out 0-20 mA, but not varying the voltage, and I don't think this would control a 0-10v actuator. Is there a way to convert the 0-20 mA variable output to 0-10 volt output? The cheapest valves I have seen that are modulating are voltage modulated, not current modulated.
Klaus
i am attempting to go bonkers and modulate the flow rate of my wort through the plate chiller so I can get to a specific wort temp directly into the fermentor as fast as possible. I know there are actuated valves that are more than just open or closed, but can be opened to variable degrees by applying a varying voltage.
The only question is this- all the PIDs that i know output a digital on off signal to an SSR or a contactor, which would not allow control of these valves. Does anyone know where I could get a relatively cheap PID that has analog output (preferably 0-10 volts)? I have seen one that is quite cheap that can put out 0-20 mA, but not varying the voltage, and I don't think this would control a 0-10v actuator. Is there a way to convert the 0-20 mA variable output to 0-10 volt output? The cheapest valves I have seen that are modulating are voltage modulated, not current modulated.
Klaus