I have noticed alot of people asking about PID temp control.
I thaught I would write a little to let you all know what it is.
PID (Pulsed Incrument Diferential) control is for controling an analog output.
Only used if you have a proportional heat source.
Is is set by a time stamp for example say 5 seconds. Every 5 seconds a scan of the imput is taken ie mash tunn temp. If the mash temp is to high or to low it adjusts the output acordingly.
Example If usin a 4-20ma signal to control a steam valve or gas burner damper. 4 would be low heat or off and 20ma would be flat out.
If the temp is say 2 degrees below the valve would open say 0.04ma
If the temp is say 10 degrees below the valve would open 5 times the amount so 0.2ma
if the temp was say 10 degrees above it would close by 0.2ma
This is designed that eventualy the valve would eventualy be positioned so as to hold temp without having to move. Thus giving a much greater control.
I thaught I would write a little to let you all know what it is.
PID (Pulsed Incrument Diferential) control is for controling an analog output.
Only used if you have a proportional heat source.
Is is set by a time stamp for example say 5 seconds. Every 5 seconds a scan of the imput is taken ie mash tunn temp. If the mash temp is to high or to low it adjusts the output acordingly.
Example If usin a 4-20ma signal to control a steam valve or gas burner damper. 4 would be low heat or off and 20ma would be flat out.
If the temp is say 2 degrees below the valve would open say 0.04ma
If the temp is say 10 degrees below the valve would open 5 times the amount so 0.2ma
if the temp was say 10 degrees above it would close by 0.2ma
This is designed that eventualy the valve would eventualy be positioned so as to hold temp without having to move. Thus giving a much greater control.