Is your DC - bus connected to your AC ground?NTC 10k Probes Calibration
I am using a few NTC 10k probes and throughout my brewery and I find them unreliable. I find myself constantly calibrating them, adding various offsets at start of each brewday. The max total offset range is anywhere from +10 to minus 10.
One of those probes is the same as used with my BCS-482. My BCS-482 as been working reliably so far.
Could this issue be linked to some EMF pollution? I find it quite difficult separating my DC and AC wires in my control panel..
So hooking the 2 DC - to one grounding stud and the AC bus to another stud?Yes it does, your EMI may be induced via something noisy on the AC ground. Try connecting the 2 DC - together and isolating them from the AC ground.
So my control panel would have 2 grounding studs like this..?Yes it does, your EMI may be induced via something noisy on the AC ground. Try connecting the 2 DC - together and isolating them from the AC ground.
As mentioned above keep the AC and DC grounds isolated. If the 2 ground studs you have pictured are attached to the side of the control panel or have a common connection then you haven't isolated them. What I did with my panel was to use the AC supply ground via supply cable and have that terminated on a series of terminal blocks which I only attach AC grounds to. This termination grounding block is isolated from the rest of the panel. My electrical panel is grounded via steel rod driven 9' into the ground. I then ran a separate ground from my copper water pipe (street side) to the side of the control panel and used a star pattern to connect my DC ground termination block for all things DC related. In other words I have 2 ground sources (1) ground from 4 wire supply AC and (2) water pipe separate path to panel and DC termination array. Both are isolated from one another. There are other ways of doing this but this was more convenient for my application.
In my case the water supply street side is copper to the water meter then PEX pipe after that so no bond/connection between the copper pipe and the main electrical panel. This situation provides 2 different paths to ground ( steel rod and copper water pipe) so yes it would meet criteria for isolation of grounds.Typically home copper water pipes would be grounded to the AC ground, even if the main AC ground is through a steel rod into the ground from the main panel. Would this still meet your isolation for EMI purposes?
No, we are trying to eliminate potential intrusion of AC signals on the DC - bus. Simply tie a wire between all of your DC - terminals and see if that eliminates your EMI you are seeing in your temperature probes.I just checked city water pipe inlet with AC panel ground and they are indeed bonded…
Perhaps I should use install a dedicated grounding Rod for my DC..?
NTC 10k Probes Calibration
I am using a few NTC 10k probes and throughout my brewery and I find them unreliable. I find myself constantly calibrating them, adding various offsets at start of each brewday. The max total offset range is anywhere from +10 to minus 10.
One of those probes is the same as used with my BCS-482. My BCS-482 as been working reliably so far.
Could this issue be linked to some EMF pollution? I find it quite difficult separating my DC and AC wires in my control panel..
Shielding your thermistor wires can help too. Would need a metallic shield/sleeve with it tied to ground at the enclosure side only.No, we are trying to eliminate potential intrusion of AC signals on the DC - bus. Simply tie a wire between all of your DC - terminals and see if that eliminates your EMI you are seeing in your temperature probes.
I have traced my wires and rechecked the connection. I also purchased a 0 to 5 v analog voltmeter.I am trying to trouble shoot an issue with Hysteresis and the Unishield, ----
River City is correct to get you up and running. Don't fix it if it a'int broken. For upgrading to v46,The biggest change will be with Analog Ports A1-A15 if you have used them. You will need to delete the "old" Elements and recreate "new" ones for any analog ports.Forgive me if I missed this, been busy running the brewery lately and have not kept up around here. Mega just burned up on me (Brewery is down!!) and I need to flash firmware on the new unit purchased. I see version 46 was released last month and the note says "This version requires new interface definition files in BruControl" I'm fairly certain I was on 45O because I had not yet changed over any interface definition files associated with 45Q.
Can someone give me a rundown on what this means (pros/cons) and the tasks/effort that are in front of me so I can better decide whether I should stick with 45O or run the new 46? I'm currently running BruControl 1.1 Build 22 which I believe pretty much confirms I was on 45O.
Steve
I did upgrade from V45 to V46 with the mindset that with any future updates I wouldn't have to mess around with the Analog port conversions on top of the actual update. Not all updates in V46 affect my situation but some have had some very useful improvements,. I figured do it now and not prolong the inevitable, just my 2 cents worth. You mention you have purchased additional MEGA's, why not install the new firmware on them, do the Analog conversion and have everything set in case the existing board goes down, this way you have a updated board to swap out in the event of a toasted board. You wouldn't have to take your existing system offline unless something happened to your production board. It's proactive insurance the way I see it.I got everything changed over and back up and running. I purchased a few extra Mega and Sunfounder Ethernet boards. In theory I should be able to install same firmware and Ethernet settings for a quick swap out in the event of another failure? Should I use same MAC address or a unique one?
What are the advantages of the newest firmware?
Tartan has a great idea. Just save your configuration and give it a name beside .....copy.brucfg and choose it as your configuration under settings. You could then upgrade at your own pace and switch boards between FW 45 and FW 46 (or Just reflash them).I got everything changed over and back up and running. I purchased a few extra Mega and Sunfounder Ethernet boards. In theory I should be able to install same firmware and Ethernet settings for a quick swap out in the event of another failure? Should I use same MAC address or a unique one?
What are the advantages of the newest firmware?
Hi thanks,Tartan has a great idea. Just save your configuration and give it a name beside .....copy.brucfg and choose it as your configuration under settings. You could then upgrade at your own pace and switch boards between FW 45 and FW 46 (or Just reflash them).
Go between configurations and FW 45 and FW 46
Here is a link to what @BrunDog said when FW 46 was released
https://www.homebrewtalk.com/thread...ntrol-automation-software.624198/post-9307818
Here is a link to how I converted:
https://www.homebrewtalk.com/thread...ntrol-automation-software.624198/post-9310064
Most firmware updates haveHi thanks,
but upgrade at this point of time brings nothing, or am I wrong?
Sorry I was away for longer time, I didn't see any new version of the software? Did I missed it :-S
Br
Earlier posted was the this question about the relay current draw;720ma total draw is also How I see it