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jms7465
Joined: 18 Dec 2013 Posts: 5
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Link Posted: Sun Jan 22, 2017 4:28 pm Post subject: Boil PID Firing Rate/Frequency too low (SOLVED) |
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I'm trying to get the boil kettle PID to fire more rapidly in the manual mode. Everything I read says to set the Cycle Time (t) to 2 for SSRs, but anything below 5 makes the PV reading freak out and go through the roof. At this point the PID is firing the element at a rate of on for about 6 seconds and off for about 6 seconds when set at 50%. So the issue is not only the temp reading but the rate as well.
BTW - I have had my system up and running for 2 or 3 years at this point, but I have a Sestos brand PID running the 20 gallon boil kettle. At this point I am trying to build an advanced BIAB 8 gallon system that runs off the same panel as my big system. I'm just trying to use the HLT (Auber) PID for both mash and boil. The Sestos PID has always worked great running the Boil in the Manual mode. It runs a t a cycle of about 2 seconds.
Help please
Last edited by jms7465 on Mon Jan 23, 2017 2:50 pm; edited 2 times in total
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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jms7465
Joined: 18 Dec 2013 Posts: 5
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Link Posted: Mon Jan 23, 2017 2:48 pm Post subject: |
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Kal, Thanks for the reply. The PID in question was indeed the Auber SYL-2352. I could not get it to pulse any quicker than 6 sec. on/6 sec. off in Manual mode.
BUT - I have corrected the issue by running the Auto Tune function. (I didn't think I would have to run it again and was reluctant due to the time it takes to do so) Basically, I set t=2, A-M=1, Then At=2 to start the auto tune going from 135F to 165F in the kettle. I left the room for a while, and came back to find that the PID was behaving as expected. I can switch between Auto and Manual easily enough with the Manual Mode firing at a rate of 1 sec on/1 sec off when set to 50%.
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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