why using 4-20ma not using 0-20or why not using 1- 20ma???????

7 Answers  

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

3 Answers  

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What is the meaning of Feedback? How many types it is? Explain it?

2 Answers   Bharathi Cement,

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what is bevel? why bevel required in orifice plate?

2 Answers  

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I have one problem for masoneilan displacer type LT.I give some imformation in data shéet given for liquid level range 0 to 600 mm and sg .955 problem is 0% is ok 25%(23%) or 50%(48%)and 75%(73%) and 100% is ok this is up value and down value all ok so please halpe me

2 Answers   Hyundai, TATA,

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Please can anybody tell me the step by step procedure for calibrating the Pr,Lvl,Fl,Temp transmitter on process?

1 Answers  

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Give an example where you had aproblem on the job, and tell me how you solved the problem. and the finalvoutcome.

0 Answers   American Steel,

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If a differential pressure transmitter is calibrated for 0~2500 mmH2o and transmits a 4~20mA dc signal. The transmitter is placed across an orifice plate which is sized to create 2500 mmH2o differential at 5000m3/Hr a) what is the flow rate when the transmitter signal is 13.0mA DC? b) what is the signal output of the transmitter when flow rate is 2500 m3/Hr ?

5 Answers  

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Can I calibrate the Electromagnetic Flow Meter on line and How.

0 Answers   SEWA,

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can you suggest good traning institute in instrumentation ? (in automation, or designing)

5 Answers  

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What is the difference between a double acting and single acting positioner? what type of valves use single acting positioners?

1 Answers   AquaTech, NamPower, Samson Resources,

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what is the basic principal of vertax flow meter

3 Answers   Balrampur Chini Mill, Saba,

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