what is the basic working principle of I/P and Positioner in any control valve.

12 Answers   Essar, Visa Steel,

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Why went

9 Answers  

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How to calibrate an pressure gauge with yantrika test bench?

0 Answers  

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without a positionar can a control valve operate? give the difference of operating with positionar and without positionar?

5 Answers   IOCL,

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why 1 to 5 vdc is used for output measurment

4 Answers  

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what is instrument termination

1 Answers  

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Hi Frnds , If Suppose 1 Pair cable of 1.5 sq mm is used for Transmitter and instead of 1.5 sq mm if i used 0.5 sq mm cable will the resistance change will occur and does it affect our transmitter reading. plz mail ur answer to ntnkamble@gmail.com plz immediately mail ur reply

1 Answers  

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Hi friends, from Aug 4th onwards iam getting spikes for analog inputs in our DCS for a period of 800ms. I throughly checked every thing, finally i found that the DI, DO's from MCC panels shields are terminated in the Signal Earth where Analog Input signals shields are terminated. Is there any problem with this type of termination?. i checked the induction voltage from MCC and getting around 25VAC, please suggest me in this concern. Our plant is 8months old only. DCS is Siemens Make Simatic PCS7, and the transmitters are Yokogawa make.

1 Answers  

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I am new in work for 1 of our project we have some instrument in BOM including Pressure, Temp. and so on, I also noticed some objects like pressure switch process HOOK UP; which I don't know what does "HOOK UP" mean here.

3 Answers  

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what is HVAC?

1 Answers  

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what type of cables are used for f&G systems and detectors, what is the standard colour?

2 Answers   Punj Lloyd Ltd,

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What is mean by AC voltage and DC voltage

2 Answers  

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