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Temperature measurement using PT100

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hemnath

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I am designing a circuit using PT100 which shows temperature range from -200 deg to 850 deg. I have temperature - resistance chart for PT100. Using that chart, i have designed a single conditioning circuit using op-amp. The output is about 0 to 1.9V (i.e., from the chart, 0V for 18.52Ω and 1.9V for 390.48Ω), and interfaced with ADC. I am using PIC 18F2520 micro controller.

Wat formula i have to use in the software to convert the adc value to temperature.

Thanks in advance.
 

hemnath said:
I am designing a circuit using PT100 which shows temperature range from -200 deg to 850 deg. I have temperature - resistance chart for PT100. Using that chart, i have designed a single conditioning circuit using op-amp. The output is about 0 to 1.9V (i.e., from the chart, 0V for 18.52Ω and 1.9V for 390.48Ω), and interfaced with ADC. I am using PIC 18F2520 micro controller.

Wat formula i have to use in the software to convert the adc value to temperature.

Thanks in advance.
Click to expand...

Check this link. https://www.edaboard.com/threads/252959/
 

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