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Old 01-17-2012, 03:13 AM   #11
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Cool thanks! I will try that tomorrow and see if there is any improvemet.

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Old 01-17-2012, 10:56 PM   #12
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Well it's definitely not the red wire. When I connect that I get a reading of zero. I connected the white and black and got my normal reading, switched polarity and got the same. So black and white it is.

I just hard wired the temp probe to the bcs, bypassing my control box so let's see if that solves the problem. It will take a day or so for the temps to go crazy again (hopefully not though).

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Old 01-17-2012, 10:59 PM   #13
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Nice to hear, that means a lack of consistency. Last one I wired was red/white.

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Old 01-17-2012, 11:12 PM   #14
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Do you think additionally grounding the unshielded wire will have any benefit?

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Old 01-18-2012, 12:55 PM   #15
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So this was an epic fail...less than 4 hours in the fermentor thermowell the temp reading exponentially increased. At 8am it was reading 456*. Pulled the probe out and went with the JC A419 until I figure this out. I'm ready to throw this thing out the window...

I can't figure out why the resistance changes so dramatically when in the thermowell. It seems to read fine everywhere else except in the thermowell. Could I have a bad probe? I ruled out wiring in my control box as I directly connected the probe to the BCS.

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Old 01-18-2012, 02:24 PM   #16
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Quote:
Originally Posted by BentTwigBrew View Post
So this was an epic fail...less than 4 hours in the fermentor thermowell the temp reading exponentially increased. At 8am it was reading 456*. Pulled the probe out and went with the JC A419 until I figure this out. I'm ready to throw this thing out the window...

I can't figure out why the resistance changes so dramatically when in the thermowell. It seems to read fine everywhere else except in the thermowell. Could I have a bad probe? I ruled out wiring in my control box as I directly connected the probe to the BCS.
Maybe it is a bi-metal probe and if it is touching the side of the thermowell it gets a change in resistance? IDK... just a shot in the dark there.
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Old 01-18-2012, 03:10 PM   #17
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The probe is stainless as is the thermowell. I got it from brewers hardware.

http://www.brewershardware.com/Temperature-Sensors/

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