How can we say that accuracy of measurement increases by using 3 or 4 wire RTD? because for example: If resistance of RTD element is say r ohms and Resistance of the cable from transmitter to RTD is R ohms And if 4 wire RTD is used, ____._____________________ R ohms | |_____._____________________ R ohms / \ / r ohms \ \ | |______.__________________ R Ohms | |_______._________________ R ohms Then the actual resistance measured will be: Total = r + R/2 + R/2 = r +R Ohms Note: r+R instead of r ohms. hence error

2 Answers  

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WHY WE R NOT USING THE TURBINE FLOW METER IN THE STREAM SERVICE ? pl explain?

3 Answers  

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what is the Instrumentation?

9 Answers   Gulf,

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what is puling in n pulling out in flame scanner system?

1 Answers  

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How does SmartPlant Instrumentation interface with physical design (3D modeling)?

0 Answers  

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How can I make calculation for Install level transmitter (DP) for open tank and cloes tank?

1 Answers   Petrofac,

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what is the difference between(Flame proof/Explosion proof)& Fire proof instruments.Both are same or different & if different in which way because the transmitter which have approved ATEX flame proof enclouser but it use PTPE O ring & PTFE Head Gasket,so its (fire safe/fire proof)????????

4 Answers  

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In 16' pipeline one pcv is installed which is controlled by PT installed at inlet of PCV.If Flowrate in pipeline increases what will happen to pressure at the inlet of pcv.

5 Answers   Essar, vssc,

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how to use one 4-20mA signal for two indicater or controller & give necessary precaution.

2 Answers  

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what is modbus & what signals are taken through it

2 Answers  

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What is an analog input - output , digital input - output . Any example ???? How they r known its ai-ao or di - do

4 Answers   Torrent Pharma,

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how to calibrate differential pressure switch

2 Answers  

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