how to connect 3 wire 4-20 mA transmitter in Plc system PLC system and how explain how the measuring data communicate with plc system.

1 Answers  

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what is function of switch, and how is it work, explain with difination

0 Answers   Bapco Bahrain Petroleum Company,

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Why we use negetive (-)voltage in vibration system

4 Answers  

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Y to use 4 to 20ma instead of 0-10v

5 Answers  

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what is the difference between servo valve & proportional valve

1 Answers  

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why we are using -24 vdc in plc?

1 Answers   CGL,

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why we use the 4-20 mamp signal used for transmitter.

5 Answers   Tecnimont,

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I want to measure level under vaccum by using DP Tx and vaccum vary between -500 to -670 mmHg and process fluid is accetic anhydride if consider process fluid density 1 kg/cm2. how to calibrate Tx ? consider level is 0 to 100 Cm.

1 Answers   CCC,

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how to calibrate bubbler type level transmitter of rosemount make and how to set air flow according to the range.. give one calibration procedure with one example

1 Answers  

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how do i tune dearator pr control valve using PID. we set the set point is 0.6kg/cm2 now i want 0.5 to 0.7kg/cm2 limits so what should i give p,i,d values. then pls explain how do set pid values for control valve tuning?

0 Answers   SEWA, Sharjah Electricity and Water Authority SEWA,

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What is the working principle of oxygen analyzers(zirconium oxide type) used in CFBC boilers?

3 Answers   Bajaj, Kohinoor, Wartsila,

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1.what is the role of proportional comtroller in pid controller?2.How do u calibrate the control valve?

3 Answers   Bently, IOCL,

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