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Reduce resistance from thermometer reading in my oven???

Discussion in 'General Electronics Discussion' started by gijoe985, Dec 10, 2011.

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  1. gijoe985


    Dec 10, 2011
    Hello all,

    I just got a new oven. It is the cheapest thing money can buy. Anyway, I am an avid pizza baker and pizzas should be cooked around 600-650 degrees. My new oven only goes to 500 degrees and this is going to be a problem for me.

    What I do know about most ovens is that they can handle much hotter temps than the over settings let you go to. On my old oven I had gotten it up to 900 degrees for baking before. (Trust me, it is a legit temp to back CERTAIN things at.) I am hoping to find a way to trick my oven into thinking that the oven temp is lower than it is. I figure that I could simply disable the thermostat, so that the elements were on the whole time, but being able to hit 650 and hold it would be a real dream.

    Most of my electronics background is from automotive and college. After looking over my ovens wiring diagrams and manual, this looks doable, I just need to figure out how. My manual does have a Resistance Temperature Detector scale. From what I gather, this is for the thermometer that senses the oven temp. It has a list of temp and correlating resistances. @ 450 degrees the resistance is 1852 Ohms +/- 13.5, @ 650 (where I'd like to hit) resistance is 2237 Ohms +/- 18.5.

    Any ideas of how to get it so if I set my oven to 450, it would actually take the temps to 650? Find a way to somehow subtract 400 ohms from what the oven control unit sees? I have wiring diagrams that i could scan if needed...
  2. gijoe985


    Dec 10, 2011
    Wire a resistor in parallel?
  3. OLIVE2222


    Oct 2, 2011
    Hi gijoe985,

    Exactly! a 10K resistor in parallel give you 1828 ohms when sensor value is 2237 ohms.

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