control valve in manual/auto mode huntting checked spring tention also it is ok.positioner also good condition & incoming inst air line also constant pr.kindly give us correct answer?

5 Answers   Madhu Power,

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What is the difference between instrument earthing and normal earthing? and why is it necessary to do so?

3 Answers   Atul,

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Why any transmitter signal is 4-20 mA only Why is started from lower range 4 mA and upper range is 20mA.

5 Answers   Edac,

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I have applied the post Junior Engineer-(TM)in R.R.B CHANDIGARH recently . what type of question i have to practice and which book ?. can i get any model question paper?

3 Answers   RRB,

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What output voltage the proximity switch shows when it is in open enviornment?

1 Answers  

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why do we use 4-20 ma current why cant o-20ma

6 Answers   Southwest Cheese,

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who discoverd ohms law?

6 Answers   HPCL, Patni,

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Hi, Is there any smart plant instrumentation design training institute in Bangalore?

0 Answers  

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During valve sizing from all calculation you got flow coefficient CV 12,than what it means? like for selecting pressure transmitter if your MAWP is 12 bar than you select a capsule of max. 20 bar which cover your mawp 12 in same way for selecting control valve If CV is 12 than how we use it in selecting valve??????

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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State four different types of flow measurement.

4 Answers   ADMA OPCO,

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Which type of pressure can be measured by these elements?

0 Answers  

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