Question about a PT 100 equation

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anujaa

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Hello all,

I have got one Eq, for PT 100 for negative temperature:
Rt = R0(1+aT+bT²+cT³(T-100))

R0 = 100 ohms
Rt is resistance of PT100
a=0.003069
b=0.000000587
c=4.27x10^-12
T temperature

so form this eq what will be the equation for T?
means T=?

Thanks in advance
 

pt100 +equation

You can use different approximations, depending on the temperature range and the intended accuracy. For a 0-400°C, this polynomial may be used

t = 1.008E-06(r-100)³ + 9.441E-04(r-100)² + 2.560E+00(r-100)

Good for -20 to 400 as well
 

equação pt100

@ FvM

The temperature range is -20 to 400ºC
 

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