Is Autotune Required on Dual Prob Auber PID Question

[Panthur]

Hey guys. If  I am going to use a brand new dual probe PID in an OBS with a fresh dual 500 watt element mod do I have to rune auto tune OR can I just change the value for "P" from 70 to 140 ? I thought I read that  somewhere a while back as being all you may need to do. Thanks.

[rexster]

That's all I did was change the P value and temps stay +/- 2 degrees all day long

[Panthur]

Perfect....thanks.

[pensrock]

Autotune is never necessary. That is if you have years of experience in tuning controllers or can get the correct numbers from someone else. But autotune is a great way for a novice to get the controller close if not right on for controlling temperatures. I even use it if working with a controller I am not familiar with. because the algorithms each company uses may be different so the instrument may react different than you are used to. Once I run autotune, (normally twice) I then make manual adjustments till I'm happy. My smoker will hold +-1 F. Is it that necessary to control a smoker that tight. No but I'm a little picky about those things. Just like when I sight in my rifles, two out of five better be touching and the other three very close. Or I'll play with the loads till I get whet I want.  :)

[Panthur]

Dumb question then.....How do I exit the PID settings mode after changing the P value ?  Hit "set" several times possibly ?

[GusRobin]

yes