PT100 Connection

Discussion in 'The Projects Forum' started by sanketbarot, Dec 13, 2006.

  1. sanketbarot

    Thread Starter Member

    Dec 12, 2006
    14
    0
    Hello Friends,

    I want to connenct PT100 Sensor..
    I am using 3 wire PT100.. I ahve read the dcumnet for how to conncet 2 wire Pt100 using wheatstone bridge.
    But now I am not getting the point is where to connect 3rd wire and How It will help to Reduce the Lead Wire voltage drop

    I hace attached one file Where I have done the Connection for 2 wire Pt100 and 3trd wire is open.

    Help me in where to connect 3rd wire and Why . How it will reduce the Lead resistance
     
  2. sanketbarot

    Thread Starter Member

    Dec 12, 2006
    14
    0
    Sorry I forgot to attach File

    Please find it here PT100.jpg
     
  3. sanketbarot

    Thread Starter Member

    Dec 12, 2006
    14
    0
    Sorry

    I forgot to attach File

    Please find it Here PT100.jpg
     
  4. wireaddict

    Senior Member

    Nov 1, 2006
    133
    0
    I checked on Google briefly and didn't find that specific info either. Try a more in-depth check on Google. I'd also do a continuity check with every combination of the leads with an ohm meter and also between the metal housing and the leads. It's possible the third lead is a ground or is unused.
     
  5. sanketbarot

    Thread Starter Member

    Dec 12, 2006
    14
    0
    Actually Third Wire is used to elemenate the Lead wire resistance...


    So Two Wires are shorted Like cheack This.. 1PT100.jpg




    Now The Lead Wire Resistace of 1st 2nd and 3rd are same..
    So Using a 3rd wire we can remove the Lead resistance of 2nd..

    But I dont Know How to do this?

    Rather Where to connect teh 3rd Wire in Wheatstone Bridge CKT
     
  6. Syed

    New Member

    Dec 5, 2005
    6
    0
  7. sanketbarot

    Thread Starter Member

    Dec 12, 2006
    14
    0
    Thank you Friends,


    It helps me Lot
     
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