hi everybody. right now i am working with thermal power plant. our company plant is tripped because of program corrupt. i would like to know is it possible when the plant is running. we are using FREELANCE ABB800F CONTROLLER.

2 Answers  

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Reasons for using seal pots:

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I am applied 100 % pressure on to the air to open control valve,but the valve is not fully closed..and 10-15% is open the valve. how to calibrate the control valve?

3 Answers   OPaL,

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can a control valve works without positioner?why need tunning of c/v?

4 Answers  

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In instrumentation standard we use 4 to 20ma for transmission , why cant we use 3 to 19ma ?

1 Answers   NSH,

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i want all model questions paper for robert bosch

1 Answers   Bosch, Patni,

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So I'm a first year apprentice and I'm having a tough time with knowing the difference between AI, AO, DI, DO. I'm having a hard time understanding what devices are which and why. Can someone explain this to me?

2 Answers  

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what is zenier barier and what means zone 1,zone 2,and zone 3

2 Answers   Bapco Bahrain Petroleum Company,

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I want to know the questions asked in ONGC interview(after being selected in the written exam) for Instrumentation branch.Kindly help.

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when the instrument tapping on pipe line is located below and transmitter is located above the tapping point for liquid service transmitter, what should we do, is there any additional drain valve is required??

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Which buffer solution is used for PH transmitter calibration?

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what does ip65 signify??what is its NEMA equivalent???

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