temp measurement

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Joined Sep 27, 2007
i m studying the temperature measurement of PT100 using INA114
for INA114 my ref voltage is 2.5 v and another intput is connectede to voltage of PT100
after INA114 buffer is connected and to that buffer zener of 2.3v is connected and it is given to ADC of controller and from there is display it on LCD

i want to know that if voltage of PT100 becomes equal to vref of INA114 then output of INA114 is=0 then in that case what will be my temp. such condition will occure?/?