what is the difference between Feedback controller and Feed forward controller. and when it is to be used.

3 Answers  

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I am using 971 Enraf radar level transmitter for LPG tanks ,the tank side indicator gives the error code 999999999FL can any body give me any diagnostic for this issue?

0 Answers  

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what is the meaning of reverse action and forward action of control valve...

9 Answers   Honeywell, Yokogawa,

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hii my name is sujith...i am preparing for HPVL GET 2010... so ,,,pls help me by send any previous questions or material to my site.....(Msujith_12@in.com) thank q

0 Answers  

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describe yourself?

1 Answers   TCS,

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Explain the working of an enraf level gauge.

0 Answers  

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difference between accuracy and precision

6 Answers   Honeywell, ONGC,

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In 16' pipeline one pcv is installed which is controlled by PT installed at inlet of PCV.If Flowrate in pipeline increases what will happen to pressure at the inlet of pcv.

5 Answers   Essar, vssc,

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while am calibrating Drager polytron 2IR flame gas detector occured non zero status.how can i get zero status?

0 Answers   Gasco,

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What's the Installtion procedure of DP Transmitter for Gas,steam and water?

2 Answers  

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How to calibration of vibration probe

1 Answers   Mina Al Ahmadi Refinery,

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How does the "as-built" function benefit plant owner/operators?

2 Answers  

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