What is open loop checking and close loop checking

1 Answers   BARC, NTPC,

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why gray colour is choosing to all instrument panel.why not choosing other colour?

1 Answers   Reliance,

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Programmable Logic control.

0 Answers   CCIE, NCVT,

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Can any body help me,The GE Mark V control system is windows based or Dos based?

3 Answers  

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what is the diffrence between plc&dcs

4 Answers   HCL, Hindustan Zinc,

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How to calculate flow of air bubbler type level transmiter  According hight and density 

2 Answers   Qatar Petroleums, RKS,

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I have installed a RTD whose length is 2250mm(RTD stem length), but it's upper 200 -250mm is out of the reactor, and this upper 200mm stem is surrounded by atmospheric temp. And the lower portion i.e. 2000mm is in contact with the measuring fluid, then does the final measuring temp. Gonna change as the upper 200mm RTD stem is out of reactor?

1 Answers   Process Control Technologies,

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in the boiler in the main steam line and its bypass line and the startup vent vales are only motorised valves why cant we use other types of valves such as pneumatic.

3 Answers  

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why we are using negative range like -750 to 0 mmwc in closed tank?and what is the reason can you explain clear?

2 Answers   Aarvi Encon,

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i/p converter always for supply pessure from 3~15 psi only !! And from where this converter bleed the air.

2 Answers  

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what r all the type of viberation measurement measuring in turbin? what's the output of viberation sensor?

2 Answers  

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Explain PID controller tuning & any one method used for it.

1 Answers   L&T, Oil India,

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