HOW TO CHOOSE FREAQUENCY IN FMCW TYPE RADAR INSTRUMENTS. DESIGN BASIS OR DESIGN CALCULATONS ?

0 Answers   Chevron,

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why we use 4-20 mA for calibration of the instruments.why we cant use 0-20 mA?

5 Answers  

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What are Sinking and Sourcing IO Cards

2 Answers  

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In dcs panel we are using diff type of modules ?what is module ? what is the use of modules ?diff type of module?

0 Answers  

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what is differences between singal acting and double action valve

1 Answers   Carlo Gavazzi, Welspun,

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What is surge in compressors? How to detect and control it?

3 Answers   Kharafi National,

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what is basic working principle of Governer in power plant?

3 Answers  

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how to calculate MMWC values in to Tonns(MMWC values showing in DP transmitter and Tonns value showing in Totalizer). please tell me details?

2 Answers   Chemin C I, MSP,

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in current transmitter why we use 4-20ma ???

2 Answers   IMCO, IOCL,

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Explain level troll principle & interface level measurement.

1 Answers   ADMA OPCO,

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how many type of control valve?

10 Answers  

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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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