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Old 08-09-2010, 01:29 AM   #111
RonRock
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I'd like to know more about your pressure sensor setup.

 
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Old 08-09-2010, 03:36 AM   #112
kladue
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Looks like a classic bubbler setup, aquarium pump for air source, metering valves to regulate bubble rate, and freescale pressure sensors. The challenge will be how to scale and zero the readings in the software, and apply density correction formula to result to compensate for SG and temperature. Curious as to whether it will be built around a labjack driver for the usb interface card.

 
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Old 08-09-2010, 02:47 PM   #113
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Quote:
Originally Posted by kladue View Post
Looks like a classic bubbler setup, aquarium pump for air source, metering valves to regulate bubble rate, and freescale pressure sensors. The challenge will be how to scale and zero the readings in the software, and apply density correction formula to result to compensate for SG and temperature. Curious as to whether it will be built around a labjack driver for the usb interface card.
Holy ****e Batman!!! I feel like I'm watching the "Big Bang Theory!" Did you pull the absurdness off the top of your head?!

I am also curious about the cleanup. When you're done brewing, you're "brew day" is only going to be like 1/3 of the way done. Awesome set up though!
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Old 08-09-2010, 07:52 PM   #114
kladue
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I spend about 50 hours a week managing industrial instrumentation installation projects and have built a PLC control based brewing system.

 
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Old 09-12-2010, 06:42 PM   #115
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Well Finally have an update:

I was having crazy problems, which I won't even get into. I was VERY close to scrapping the project(which is why there have been no updates). But as of today, I can open and close valves, and turn on and off pumps. Still working on pressure sensors, but as of today 95% of the plumbing is complete. All I have left is an auto-fill valve for the reverse osmosis. I have been running water tests and it looks like it *should* work.. the brewery that is!

Plumbing as of today:



Brewery:


Have a few lbs of homegrown hops calling my name for a harvest ale.. so hopefully I can get stuff sorted out soon.. Inaugural brew day of October 2nd slated.

 
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Old 09-13-2010, 02:41 AM   #116
kladue
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I expect you have been having problems with trapped air in the plumbing causing the pump to cavitate and quit pumping when you start up.

 
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Old 09-13-2010, 03:46 AM   #117
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That is beautiful!!!! Can I come up for brew day?

 
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Old 09-13-2010, 11:58 AM   #118
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Quote:
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I expect you have been having problems with trapped air in the plumbing causing the pump to cavitate and quit pumping when you start up.
No actually it is/was sensor issues, the pump is working great.

 
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Old 09-13-2010, 11:59 AM   #119
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That is beautiful!!!! Can I come up for brew day?
Certainly!

 
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Old 09-13-2010, 01:27 PM   #120
kladue
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What kind of difficulty did you have with the temperature sensors?, I am looking at an ARM based automation platform with the 1 wire sensors.

 
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