PT100 Connection

Thread Starter

sanketbarot

Joined Dec 12, 2006
14
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
 

wireaddict

Joined Nov 1, 2006
133
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.
 

Thread Starter

sanketbarot

Joined Dec 12, 2006
14
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
 
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