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Old 04-13-2012, 03:16 AM   #1
Architeuthis
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Hi all,
I'm new to HBT. I've just completed a project: a PID temperature controller using a Sestos PID controller, a GFCI receptacle and a 25A SSR. I did not put a switch in the box, nor is the GFCI connected to ground. Does this matter? I've tried it and it holds temperature pretty well. I haven't been able to auto-adjust it yet, I've tried setting it to ON/OFF, then turning it back to PID and then pressing the auto-adjust button but no flashing auto-adjust happens. There is actually a setting in the functions that says 'auto-adjustment' but when I turn it to that setting nothing happens. It doesn't help that the instructions seem to be a literal translation from chinese. Also, when it runs it seems to run one degree hotter than the set value I have it, I've checked the thermocouple against another I have and they both read the same value. If anyone has any experience with these I'd sure appreciate some help as this is my first DIY project


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Old 06-02-2012, 05:17 PM   #2
carlisle_bob
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Hi

1) Yes you do need to properly hook the GFCI to ground. If you don't it's not going to do anything useful.

2) A PID is great for some things and a disaster for other stuff. What are you controlling with this? There are very few small scale brewing applications that a PID helps with.

3) It sounds like your controller is in the on/off mode with a one degree difference between the "turn on" and "turn off" values. I suspect you will need better instructions on how to set it up.

4) Auto adjust is normally a process where the controller runs for a while and then "decides" what it's going to do. You may need to let it run overnight.

Bob
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