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franklin.s
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Join Date: May 2008
Posts: 8

what does compensate on a RTD mean?

08/25/2008 3:25 AM

can u help me about the third wire on a pt100 RTD.i just know that it compensate but how.
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JohnDG
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United Kingdom - Member - Not a New Member Hobbies - Musician - New Member Hobbies - Fishing - New Member

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Location: Reading, Berkshire, UK. Going under cover.
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#1

Re: what does compensate on a RTD mean?

08/25/2008 4:10 AM

This link shows the wiring for 2-, 3- and 4-wire RTDs, and explains briefly how the lead resistance affects readings and can be compensated for (depending on type).

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jamsshed
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Join Date: Oct 2006
Posts: 48
#2

Re: what does compensate on a RTD mean?

08/29/2008 1:12 PM

In 3 wire Pt 100 3 wire compensate in this way , 3rd wire is parallel with other one.As u know resiatance in parallel is decrease. so as in 4 wire rtd 2 wires parallel in each other.
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