Hello all, I added a pid controller to my kiln so I can use it for heat treating steel. I am using a "Mypin ta4" pid controller powering a solid state relay with heat sink.
Everything was working well for a while and I have been using it off and on at low temps (350*F) for some other projects. Today I went to normalize a piece of steel which requires 1700*F. The kiln begins to heat up and gets to about 1000*F then the pid shuts off, the whole screen and everything goes dead and begins turning off and on. When the display come back on it has 1900 on the temp line and y on the set line and all the lights are illuminated. I did this 2 times and it got to the same temp and did the same thing. I am assuming that the thermocouple has failed but im not sure. I am using a k type thermocouple. When set to a lower temp the controller works normally and will maintain a temp of about +/- 2*F. Does this sound like a bad thermocouple?
the manual does not have anything about this error.
Im sorry if this is the wrong forum for this question.
Everything was working well for a while and I have been using it off and on at low temps (350*F) for some other projects. Today I went to normalize a piece of steel which requires 1700*F. The kiln begins to heat up and gets to about 1000*F then the pid shuts off, the whole screen and everything goes dead and begins turning off and on. When the display come back on it has 1900 on the temp line and y on the set line and all the lights are illuminated. I did this 2 times and it got to the same temp and did the same thing. I am assuming that the thermocouple has failed but im not sure. I am using a k type thermocouple. When set to a lower temp the controller works normally and will maintain a temp of about +/- 2*F. Does this sound like a bad thermocouple?
the manual does not have anything about this error.
Im sorry if this is the wrong forum for this question.
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