Answer / satish

active / passive connection mean that two wire and four
wire transmission

Answer / abdelrahman

means 2 wires instrument(current sink).

THE OUTPUT OF A CURRRENT TRANSMITTER OR A PNEUMATIC TRANSMITTER HAS A LIVE ZERO?EXPLAIN

2 Answers  

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Can we use a 10000 Lph Flow Transmitter in 100 LPH flow line to get 20mA O/P by adjusting SPAN ?

1 Answers  

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why we should maintain neutral earth voltage below 1V while calibration? why cant it be 1.2V or 2V

1 Answers   Hospira,

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What are the different types of temperature sensors and the principle they work on?

1 Answers   GAIL,

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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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calibration of instruments.

11 Answers   ONGC,

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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 are the type of bonnets in the control valves?

1 Answers   CCIE,

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radial & axial vibration sensor output voltage is ac or dc volt?

8 Answers   Vedanta, Voltech,

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difference between plc and dcs?

3 Answers   Honeywell,

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can we connect instrument earth pit to electrical earth pit, if not why?

2 Answers  

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in split range control valve,two valve should be in two different line and that should have some distance,and we have only one positioner feed back link.so how we connect one feed back in two control valves?if you have picture please forward me.my email id kb.syamkumar@gmail.com

2 Answers  

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