I just finished this yesterday. Just a few more parts outside the panel left for full system functionality! Yes there's a couple holes left that I must seal up with some silicone.
Power routes through a 63a disconnect. Power for elements goes through 2 30a breakers, then 2 40a contactors, and 2 40a SSR's. Power for the contactor coils, 2 pumps, and BCS comes from the 10a breaker. All this is fed from my 100a subpanel right next to this box that I recently installed in this 10'x20' outbuilding. It houses a 60a gfci and 2 20a breakers for my fridges and lighting etc. It is fed from my main panel in my house from a normal 100a breaker, from which I buried 70 feet of 2 gauge 4 wire aluminum.
The BCS runs great! Thank you ECC for a stellar product. I now have to calibrate temp probes... using thermistors from Derrin at brewershardware.com and they read 224 at the boil and about 10F over in mash range. I gathered some temp samples and resistances and tried the calculator listed on this site, and the B value that the calc gives me will not take. Any suggestions?
Finished BCS control panel
Re: Finished BCS control panel
Nice panel! Great work, I'm a big fan of wiring duct. What are the dimensions of your enclosure?
What are the exact ABC values that you are trying to program? The BCS only recognizes a certain precision (10 decimal places I think), so it might be truncating your values. I believe Derrin has a set of coefficients that he makes available for his probes.
What are the exact ABC values that you are trying to program? The BCS only recognizes a certain precision (10 decimal places I think), so it might be truncating your values. I believe Derrin has a set of coefficients that he makes available for his probes.
Re: Finished BCS control panel
The enclosure is Hoffman 16"x14", I think its 6" deep.ECC wrote:Nice panel! Great work, I'm a big fan of wiring duct. What are the dimensions of your enclosure?
What are the exact ABC values that you are trying to program? The BCS only recognizes a certain precision (10 decimal places I think), so it might be truncating your values. I believe Derrin has a set of coefficients that he makes available for his probes.
As for the calibration, here are the resistances I recorded and their coinciding temps read with a calibrated therm:
37.2F (calibrated therm) - 26837.5 (bcs resistance at this value) (BCS registered 35.6F for this resistance)
112F - 4928.5 (110.2F)
180F - 1156.3 (190F)
In the low temps its reading low, at high temps its quite high.
With the calculator and default model number, I got:
A=0.0017479867
B=1.2114947e-4
C=6.02851e-7
The BCS didn't like the B value and scooted my decimal place to the left by like 4 digits and chopped of the last digits so I ended up with 0.001211494.
Re: Finished BCS control panel
ok.. I found this on derrin's site:
I'll try these out this afternoon or evening. Thanks guys for the nice commentsYou will need to enter the following coefficients into the BCS-460 setup panel to get them to read properly:
A= 0.001137155
B= 2.3259496e-4
C= 9.540003e-8
Re: Finished BCS control panel
Yeah, that's normal. Its the same number, just a different representation. The BCS isn't able to store the whole number, so you lost the 7 on the end. This is well within the accuracy of the device.