Reflow Toaster Oven - Part 5 - Crispy Thermocouples

I like my thermocouples well done...

So that little blue piece of shrink tubing(?) doesn't seem to cope well with 200+ degrees C. Oh well.
Did a bit of testing tonight. I placed the four thermocouples in and around the oven:
- one attached to the heater
- one just floating in the middle of the oven
- one stuck through one of the vent holes on the side
- one attached to the top of the oven
And then I turned the oven on :) I recorded the whole thing and manually put all temperatures at 5 second intervals into a spreadsheet. Here's the result:

At one point the thermocouple on the heater fell off, that's when I turned the oven off. The interior was about 270 degrees C by then and kept rising for a short period. Then I opened the oven's door and the air temperature plummeted.The reason these readings differ so much from earlier profiling is because of the thermocouple I used. There small ones have very little mass, so they heat up much faster than the one I used earlier.
What worries me a bit are the green and purple lines. They reach about 80 degrees C, that means the oven is way too hot to put any electronic controls inside. I hope this is reduced significantly after I insulate everything.

I also played a bit with RaceRender, it can overlay various types of data on video images.

Nice :)