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    RTD PT100 Temperature from Resistance

    Hello!

    Can someone tell me how to calculate RTD PT100 Temperature from its Resistance. I need the equation for calculating temperature from resistance. I've coded for resistance and it is working properly. I need the equation to get the value of temperature from rtd pt100's resistance.

    •   Alt16th May 2012, 13:30

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    •   Alt16th May 2012, 14:23

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    Re: RTD PT100 Temperature from Resistance

    The post asks for the inverse calculation. It can be performed based on a polynominal as well. The fit should be calculated based on the intended accuray and temperature range with the necessary order.

    You can use the curve fit feature of a spread sheet calculator like MS Excel to calculate the polynomial coefficients.
    Last edited by FvM; 16th May 2012 at 14:36.



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    Re: RTD PT100 Temperature from Resistance

    Sorry, but I've checked all those links. The quuation I have is giving the right temperature only upto 100 degree C. Any thing above 100 degree C, I'm getting wrong values.



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    Re: RTD PT100 Temperature from Resistance

    Apparently, you are doing something wrong.



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    Re: RTD PT100 Temperature from Resistance

    Quote Originally Posted by FvM View Post
    The post asks for the inverse calculation. It can be performed based on a polynominal as well. The fit should be calculated based on the intended accuray and temperature range with the necessary order.

    You can use the curve fit feature of a spread sheet calculator like MS Excel to calculate the polynomial coefficients.
    Can you give me the equation?

    ---------- Post added at 20:05 ---------- Previous post was at 20:04 ----------

    Quote Originally Posted by FvM View Post
    The post asks for the inverse calculation. It can be performed based on a polynominal as well. The fit should be calculated based on the intended accuray and temperature range with the necessary order.

    You can use the curve fit feature of a spread sheet calculator like MS Excel to calculate the polynomial coefficients.
    Can you give me the equation with polynomial coefficients?



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    Re: RTD PT100 Temperature from Resistance



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