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Post by jfox on Apr 27, 2018 20:33:29 GMT -6
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gczop
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Post by gczop on Apr 28, 2018 17:10:26 GMT -6
Thanks Jim, what is the maximum temp application for that thermocouple?
by the way the oil spot pieces all oxidation (electric kiln).
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Post by jfox on Apr 28, 2018 23:34:11 GMT -6
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jd
New Member
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Post by jd on Jul 6, 2018 7:11:47 GMT -6
Jim, are you still using this thermocouple? I am looking into adding these to my Skutt 16-f kilns and resetting the controller to an S type. I would update the lead wire to S type as that is not too expensive. Just woundering how they are working for you.
thanks for the help and input.
Jeff
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Post by jfox on Jul 6, 2018 17:09:38 GMT -6
its still working but only about 30 firings as ive been preoccupied with other projects lately,i just ordered a piece of type s extension wire and interested to see how that effects calibration.but it wasnt too far out of wack with the type K extension wire. I bought another one of those thermocouples and intend to use it at about 1400 C on some kiln shelf material tests that should put it to the test www.ebay.com/itm/312174032711 |
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jd
New Member
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Post by jd on Jul 10, 2018 6:43:59 GMT -6
Thank you Jim. I have ordered several of these and about 25 ft of the s type wire as we have 3 thermocouples in our skutt 16-f. I am going to put them in and see how this goes and if it works well I may even change over my other kilns as these thermocouples are not that much more than what I pay for the K type. However I do believe they will be a great asset for the crystal firings I do. Will report back after a few firings for sure.
Jeff
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Post by winner on Aug 17, 2018 2:11:23 GMT -6
Ok here we go, I got 4 of the $18 s type thermocouples and the wire is very thin; The saying goes you get what you pay for.
Used it in 3 firings and the temp was very close to my old s thermalcouple readings through the firing.
But at that price what can you louse.
At the other extreme I just got something I have wanted for years, my 1st optical piromiter.
I will be waiting until after the summer show ends before I can spend the time hooking it up. It’s rated to an accuracy of 0.1f and takes the temperature of what it is looking at. Can’t wait to see how the temperature of a porcelain vase or crystal growing in the Kiln varries from the temperature reading of the s type thermal couple.
I also am working to get time lapsed video of a crystal growing.
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Post by jfox on Aug 17, 2018 8:02:42 GMT -6
I have a classic optical pyrometer and a high temp infrared digital pyrometer the former i found kinda useless because of calibration issues around filament current and observation distance and the latter is tricky because of emissivity issues but if you use a standardized target it works great.
i use the kiln wall as a standard target but a piece of silicon carbide i think would be better
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jd
New Member
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Post by jd on Aug 31, 2018 8:06:28 GMT -6
Jim, Did you have any issue getting the S to work? I put them in our Skutt 16-f and they seem to read hot (around 100 all the time with kiln off). Bisque went well, but when I tried to do a high fire (2340) Kiln errored out (E-1). Talked to Skutt and they seem to think there is a lose connection some where. Went back to my K type and kiln fires fine. Just checking to see if you had to do any adjustments or something. thanks for the help and any input.
Jeff Walker HillCreek Pottery Branson, MO |
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morgan
New Member
Darn...lot of good info on the old forum. Sad that it got unstable. But whadya do?
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Post by morgan on Jun 10, 2019 6:09:49 GMT -6
I bought some S-type TC's off eBay. Was a China seller, but the shipping actually was fairly quick. Got two of the lower price ones @ roughly $30. One of them was wired backwards...no big deal just swap the connections. However, both of them when the temp got up to roughly 1800F the reading was jumping all over the place. Like a 20 degree swing. I thought..."OK, I'll get one of the higher priced ones that claim to be more stable". I think it was about $45. Got it in, installed it and fired her up. Same thing. Higher temps and the readings were all over the place. My firings came out looking like crap. So...dropped back to a K-type with everything else remaining the same...great firings. Like somebody above said... "You get what you pay for". Yes, I did set the controller for S-type, then back to K-type. Guess I'll just have to wait until I can afford a quality S-type (which are tough to find, I got a quote from Omega... $650... for ONE TC).
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Post by jfox on Jun 23, 2019 20:27:05 GMT -6
sorry i got you involved mine seemed to work alright for a while but then degraded it been giving all kinds of anomalous results i use it in a gas kiln that i fire manually and ive been actually using my digital optical pyrometer and a type k to call the shots lately
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Post by nikolaybg on Jul 23, 2021 2:05:48 GMT -6
I bought some S-type TC's off eBay. Was a China seller, but the shipping actually was fairly quick. Got two of the lower price ones @ roughly $30. One of them was wired backwards...no big deal just swap the connections. However, both of them when the temp got up to roughly 1800F the reading was jumping all over the place. Like a 20 degree swing. I thought..."OK, I'll get one of the higher priced ones that claim to be more stable". I think it was about $45. Got it in, installed it and fired her up. Same thing. Higher temps and the readings were all over the place. My firings came out looking like crap. So...dropped back to a K-type with everything else remaining the same...great firings. Like somebody above said... "You get what you pay for". Yes, I did set the controller for S-type, then back to K-type. Guess I'll just have to wait until I can afford a quality S-type (which are tough to find, I got a quote from Omega... $650... for ONE TC). I confirm what was written. The Chinese TC type S gave me a deviation of 30 degrees Celsius at cone 5. I talked to the manufacturer of the controller to tell me if it is possible to calibrate the controller to work with the Chinese TC type S, but the price for this service is almost as much as a new quality TC .  |
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