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

4 Answers  

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why 4-20 mA in covection system?

3 Answers  

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Gas equation

0 Answers   CCIE,

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What is basic of instrumentation

8 Answers  

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It is desired to reduce effect of 50Hz pick up in a thermocouple measurement. If a third order LP filter is used for this, what should be its cut off frequency, if gain should be 0.001 at 50Hz.

1 Answers   Honeywell,

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Why we used cage in control valve?

8 Answers  

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What is ptw and write 3 types of ptw?

5 Answers   Emco,

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how can calibrate pressure transmeeter in the feild ?

1 Answers  

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why use 4-20mA in the field of instrumentation?

8 Answers  

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Someone please do mail me some instrumentation questions for Hindustan Petroleum test to avinalexander@gmail.com .Really would be gateful if someone could help me

3 Answers   HPCL, Immersion, IOCL,

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how to calculate static pressure in a pipe line,when we know the DP(differential pressure) in the line, area of the pipe? please any one tell me the relation between them..?

2 Answers  

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what is weighfeeder

2 Answers  

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