Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > Electric Brewing > Ever see a pot of boiling water give a reading of -55F? I have...
Reply
 
LinkBack Thread Tools
Old 06-26-2011, 07:00 PM   #1
Puffy84
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2010
Location: Pensacola, Fl
Posts: 2
Default Ever see a pot of boiling water give a reading of -55F? I have...

Ok, here's the scoop....
I have a Love Controller 4C Series, connected to a thermocouple in my RIM system. I had to have the controller replaced due to defective terminals but since then, the new one has worked fine. I have the controller hooked up to a 12 DC solid state relay and then going to a 1500w AC heating element (AC power is supplied separately). All of that works just fine.
The problem is, I hooked up my controller in the kitchen yesterday to the thermocouple, then dipped it in a pot of boiling water. Prior to putting the thermocouple in the water, the temp reading was 75, once I dipped it in the boiling water, it jumped down to 0 then to -55F.
I went through the programming with a Dwyer tech. on the phone a few weeks back when I initially programmed it so I know its set to F vs C and its programmed for the right thermocouple.
Has anyone ever seen this before or have any insight to what the problem might be?? I know all I need to do is wait til I Monday to call Dywer but this is my last step in a 7 month RIMS building project and I haven't been able to brew since Nov! Plus school is getting in the way. Any thoughts are welcome!!!


-Shawn "Puffy" Combes

__________________
Puffy84 is offline
 
Reply With Quote Quick reply to this message
Old 06-26-2011, 07:47 PM   #2
djsethall
Registered User
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2010
Location: Olympia, WA
Posts: 3,431
Liked 14 Times on 12 Posts
Likes Given: 14

Default

Proper polarity.

__________________
djsethall is offline
 
Reply With Quote Quick reply to this message
Old 06-26-2011, 08:40 PM   #3
mattd2
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2009
Location: Papamoa, New Zealand
Posts: 3,468
Liked 245 Times on 200 Posts
Likes Given: 43

Default

Quote:
Originally Posted by Puffy84 View Post
...I went through the programming with a Dwyer tech. on the phone a few weeks back when I initially programmed it so I know its set to F vs C and its programmed for the right thermocouple...
I am guessing that you might have the wronge type of sensor (NTC vs PTC) But you said that it was programmed for the correct one so that has stumped me, unless the sensor was labeld/packaged wrong from factory?
Disregard this if you have thermocouples
mattd2 is offline
 
Reply With Quote Quick reply to this message
Old 06-27-2011, 01:42 PM   #4
bbognerks
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2010
Location: Wichita, KS, Kansas
Posts: 377
Liked 16 Times on 16 Posts
Likes Given: 1

Default

I dropped a RTD temperature probe from Auber and got some strange readings like this. Turned out when I dropped it, the impact broke the sensor's thermal mass (looks like a piece of ceramic). This is part of the actual sensor inside the SS thermowell. I called Auber, they sent me a new sensor for $10 shipped. I soldered it in and was up and running again. If your probe is in a SS thermowell and you dropped it or knocked it hard against something, you may have done the same.

__________________

Primary: Belgian Dark Strong Ale

Keg 1: English IPA
Keg 2: Dortmunder Export
Keg 3: Sweet Stout
Keg 4: Kölsch

bbognerks is offline
 
Reply With Quote Quick reply to this message
Old 06-27-2011, 01:54 PM   #5
samc
Feedback Score: 1 reviews
Recipes 
 
Join Date: Aug 2008
Location: Portland OR
Posts: 5,420
Liked 54 Times on 51 Posts
Likes Given: 29

Default

Issues like this have always been a loose wire or grounding for me.

__________________
samc is offline
 
Reply With Quote Quick reply to this message
Old 06-27-2011, 03:53 PM   #6
clay9_24
beerganeer
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
clay9_24's Avatar
Recipes 
 
Join Date: Dec 2009
Location: Comanche, TX
Posts: 104
Liked 1 Times on 1 Posts
Likes Given: 1

Default

Sounds like polarity or grounding troubles to me. I have had this trouble/accident when connecting TC to a controller that will accept TC or RTD sensor inputs. What seems like the proper polarity connection, actually is actually the proper polarity if you were connecting a RTD which is incorrect for a TC , if that makes sense.

__________________
clay9_24 is offline
 
Reply With Quote Quick reply to this message
Old 06-27-2011, 04:25 PM   #7
gswartley
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
gswartley's Avatar
Recipes 
 
Join Date: Oct 2010
Location: Bowmansville, PA
Posts: 101
Liked 4 Times on 4 Posts

Default

if you connect a T/C backwards it will read backwards.

on most T/C's the red lead is the - lead.

I would reverse the T/C leads and try the test again.

__________________
gswartley is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Marshalltown bucket water heaters milldoggy Electric Brewing 11 09-24-2012 11:34 AM
RIMS heater boiling wort? Dimerizer Electric Brewing 20 06-17-2011 03:18 AM
resistance / resistivity of water and wort crush Electric Brewing 4 05-16-2011 11:27 PM
HLT Low Water Alarm/shutoff dtfeld Electric Brewing 38 04-06-2011 03:02 AM
weldless water heating element in keggle pennisim Electric Brewing 4 04-03-2011 03:05 PM