In case of Transmitter's(e.g.Ultrasonic Flow meter ) we have an normal practise of selction of upstream and downstream distance such as (20D and 5D ).can anyone please let me know whow to calculate "D" ?? i guess it refers to pipe thickness is t right ?

2 Answers  

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How do you measure g's?

5 Answers   Aramco, GNFC, HPCL, Polmon, Thermax,

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How to carry out hot loop checking of closed loop pf temperature control valve & temperature transmitter?

2 Answers  

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I wnat to practice more online type questions .so will you show them me to take a practice test?

1 Answers   VA Tech Wabag,

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what different types of problems do occur while doing instrumentation commisioning and how to solve them? please explain in detail

0 Answers   Process Control Technologies,

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draw the block diagram of a level transmitter ?

0 Answers   Hira Group, Samsung,

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Question on maha cement

0 Answers  

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Why even multiple power supplu r used in instrumentation system?

1 Answers   Honeywell,

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INtools Trainining

1 Answers   Monarch Techno Engineering Solutions,

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explain level transmitter working

1 Answers  

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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 are the pinciples & units of flow, level, temperature, pressure, quality.

1 Answers  

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