calculation of RTD resitance in bridge

Discussion in 'General Electronics Chat' started by bhavya.chollety, Jan 5, 2014.

  1. bhavya.chollety

    Thread Starter New Member

    Jan 4, 2014
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    0
    Hello,
    In my project i need to interface RTD with 89C52 microcontroller. i found the resistance of RTD at room temperature which is about 111ohms. i created a higher temperature by using a bulb for about 15minutes wich increased the resistance to 120ohms.Then i kept the RTD in cold water and found the resitance to be 109.5ohms from 111ohms.
    my question is that "how to calculate the resistances value for decrease in temperature while interfacing?"
     
  2. BillB3857

    Senior Member

    Feb 28, 2009
    2,400
    348
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