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

6 Answers   Southwest Cheese,

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Explain PID controller tuning & any one method used for it.

1 Answers   L&T, Oil India,

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In split range control, we will control 2 outputs with time interval. Eg :(with 4-20 ma signal, for 4-12 ma we are operating one control instrument like valve & for 12-20ma we are operating other control instrumet (other valve). If we get a signal of 15ma to first instrument (Valve 1), what will happened to the first valve, and if we get signal above 20 ma to 2 valve what will happened ?

3 Answers  

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can any one give me the cost price of yokogawa & rosemount transmitters

4 Answers  

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What is the difference between PLC and DCS?

3 Answers  

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it is possible to check the fail safe condition in pressure transmitter. if possible how?

0 Answers  

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how do i calibrate mmwc pressure guage with out calibrator.if any? pls give me the ans.

1 Answers  

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what is the difference b/w magnetic flow meter&mass flow meter? which one is best?

1 Answers  

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how to overhaul control valves.what are the proper procedures.

1 Answers   Jindal, QAFCO,

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Transducer Input 0 to 230 v ac Output-0 to 10vdc Receiver Input 0 to 10 vdc and Output 4 to 20 ma How?

1 Answers  

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is any standard angle for thermowell mounting for horizontal and vertical pipe lines?

3 Answers  

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is there any digitel grevity meter availaible in the market by which we can measure specific gravity of a battery?

0 Answers  

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