I am looking at building a brew system and have been reading quite a bit about the different PID Controllers. I would like to use gas for the system, just my preference.
I have seen a lot of home brew systems built that use a PID controller with a gas valve. But if I understand correctly from what I have been reading, using a PID controller with a gas valve the controller has to be in the ON/OFF mode therefore only getting the benefit of the P in the PID. It will keep the temp close but always fluctuate a few degrees high and low depending on the width of the dead band.
The only way to get better control i.e. PI is by using a heat source that is variable like an electric element or a modulated gas valve.
Any comments would be appreciated.
I have seen a lot of home brew systems built that use a PID controller with a gas valve. But if I understand correctly from what I have been reading, using a PID controller with a gas valve the controller has to be in the ON/OFF mode therefore only getting the benefit of the P in the PID. It will keep the temp close but always fluctuate a few degrees high and low depending on the width of the dead band.
The only way to get better control i.e. PI is by using a heat source that is variable like an electric element or a modulated gas valve.
Any comments would be appreciated.