Why 4ma - 20ma signal used in instrumentation??

5 Answers  

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i/p converter always for supply pessure from 3~15 psi only !! And from where this converter bleed the air.

2 Answers  

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draw a loop drawing of vibration beginning to end

1 Answers  

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without color coding, without nameplate, without multimeter how can you find the type of thermocouple???

1 Answers   Sabic,

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Which types of quections asked in interview for FORMULATION PLANT (PHARMA)

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PID controller is used for which type of compensation…… a) lead comp. b) lag com. c) lead lag com.

12 Answers   Engineers India Limited,

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how we are selecting instuments by differentiating certain instruments in 4 to 20 ma range and certain in 1 to 5 v dc

0 Answers  

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Hi..i am B.E. (elect.&comm.)..i m workini in a bio mass power plant as inst. Engg. I want 2 know about growth in big power plant sector..is this field is good 4 me ..i m electronics engg..? Plz plz reply..

2 Answers   Reliance,

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What is minimum distance between three thermocouples (2oo3) mounted on same pipe line (20")? Technically accepted by stright line mounted or circler mounted?

1 Answers  

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1. How can leveltrol be installed in steam drum for measuring the level of steam drum?

1 Answers   Fischer,

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A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.

0 Answers   MNC,

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What is the exact differences between HART,FOUNDATION FIELDBUS,PROFIBUS?

0 Answers   Jubilant,

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