Ogden ETR-8120-31221 Temperature Controller

WhitePine · Post by **WhitePine** » Fri Sep 21, 2012 10:49 am

Hey everyone. I came upon an unused temp controller here at work which the company is willing to give me. I've read a bit about it and I think it will work for controlling some heat blankets. Can anyone confirm this for me?
http://www.google.com/url?sa=t&rct=j&q= ... vtkHran4Jw

I plan on building some of my own blankets (if I can ever find the time) but I need to research the wiring and electrical aspects a bunch more so I don't burn down my garage. My judgement tells me I can use this controller but affirmation is always a good thing. Will it work?

troublemaker · Post by **troublemaker** » Fri Sep 21, 2012 7:07 pm

Yeap, that controller will work great! All you need is a SSR or two. Also were you going to build 120VAC or 240VAC mats? If 120 the magic number is around 10ohms and at 240 40ohms. If you need anymore help just ask, I've built a few.

gozaimaas · Post by **gozaimaas** » Tue Sep 25, 2012 9:13 pm

I just bought the same setup that you have troublemaker, cant wait to get it all built.
PS did you snip off the threaded fitting on the end of the thermocople?

troublemaker · Post by **troublemaker** » Wed Sep 26, 2012 6:08 am

gozaimaas wrote:I just bought the same setup that you have troublemaker, cant wait to get it all built.
PS did you snip off the threaded fitting on the end of the thermocople?

No, I just make my own thermocouplers. You can buy bulk thermocouple wire on Ebay for $10 for 50 feet. The first controller I built used a PT100, but it seemed a little to bulky for my press.

gozaimaas · Post by **gozaimaas** » Wed Sep 26, 2012 6:15 am

Oh ok I just bought 2 of them as kits on ebay and they come with a thermocouple with a threaded end, ill probably just modify the end to something flat.

http://www.ebay.com.au/itm/220930529752 ... 1439.l2649

troublemaker · Post by **troublemaker** » Wed Sep 26, 2012 6:15 am

WhitePine wrote:Hey everyone. I came upon an unused temp controller here at work which the company is willing to give me. I've read a bit about it and I think it will work for controlling some heat blankets. Can anyone confirm this for me?
http://www.google.com/url?sa=t&rct=j&q= ... vtkHran4Jw

I plan on building some of my own blankets (if I can ever find the time) but I need to research the wiring and electrical aspects a bunch more so I don't burn down my garage. My judgement tells me I can use this controller but affirmation is always a good thing. Will it work?

What is the whole part number for the controller? You might not have output voltage to drive the SSR. Maybe just have a set of contacts and you need to supply 3-32VDC to the controller.

troublemaker · Post by **troublemaker** » Wed Sep 26, 2012 6:21 am

gozaimaas wrote:Oh ok I just bought 2 of them as kits on ebay and they come with a thermocouple with a threaded end, ill probably just modify the end to something flat.

http://www.ebay.com.au/itm/220930529752 ... 1439.l2649

If you have a torch just cut the end off of the thermocoupler and remelt the thermo wire with your torch. (A propane torch doesn't get hot enough)

gozaimaas · Post by **gozaimaas** » Wed Sep 26, 2012 6:32 am

troublemaker wrote:
gozaimaas wrote:Oh ok I just bought 2 of them as kits on ebay and they come with a thermocouple with a threaded end, ill probably just modify the end to something flat.

http://www.ebay.com.au/itm/220930529752 ... 1439.l2649
If you have a torch just cut the end off of the thermocoupler and remelt the thermo wire with your torch. (A propane torch doesn't get hot enough)

Yeah cool. I have an oxy/acetylene torch and also a 250 amp tig welder I should be able to sort something out!

WhitePine · Post by **WhitePine** » Sat Oct 06, 2012 9:19 pm

troublemaker wrote:Yeap, that controller will work great! All you need is a SSR or two. Also were you going to build 120VAC or 240VAC mats? If 120 the magic number is around 10ohms and at 240 40ohms. If you need anymore help just ask, I've built a few.

Thanks! I believe it has an SSR built into it. Can I really do this with 120VAC? I was under the impression that I had to re-wire my garage for 240. So you build and sell mats?

troublemaker · Post by **troublemaker** » Sat Oct 06, 2012 9:33 pm

No, it doesn't have a built in SSR. What it has is 0-10VDC output to drive a SSR. SSR's are built to handle the high current draw of a heat mat. You can pick up a 25amp SSR on ebay for less than $10 shipped. Yes you can do this with 120VAC fine, if you wanted to run 240 to your shop that would be better on your electric bill. Yea, I have built a few heat mats and PID controllers for some guys on here.

knightsofnii · Post by **knightsofnii** » Tue Oct 09, 2012 6:52 am

the hardest part of the whole PID setup, is reading that damn manual and understanding how to program a simple set temp/time program.

Once you do that, just flip the switch, and go eat dinner

.

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Ogden ETR-8120-31221 Temperature Controller

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Re: Ogden ETR-8120-31221 Temperature Controller