bloke

Recipes 

ok samc I better wait for my RTD to arrive in the mailbox then

cheers

Quaffer

Recipes 

Do you have circulation in your HLT? If not you will likely overshoot the set point. If you have a pump try to circulate the water in the HLT. If not, stir with a long spoon as it is getting close to the set point. Water likes to settle in layers of different temperature, "stratification". Some brewers put a stirrer motor on their HLT to break up the temperature layers.

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bloke

Recipes 

Yes I have a Stirrer motor on my HLT.

bloke

Recipes 

I got my new RTD yesterday and did a test. It worked a hell of a lot better the temperature was almost ok even without any calibration. I only tried it in PID mode and it did overshoot by 2 degrees celcius before and after autotune.
any idea how to trim the pid values to get it right on target?