Answer / anurag,e&a,ispat ind. ltd.

loop is that by which we feedback some output signal to
input.there are two type of loops.
1.closed loop
2.open loop

Answer / ulaganathan

a loop may be defined as connection of elements
to the circuit making use of feedback.
It may be of open or closed type

Answer / ramanathan

A loop is which has a feed back of output&where the error
deduction has been done.eg. in a closed loop there will be
sensing of value & controller will do the job.

Answer / eid elatawy

Loop can be process loop or instrument loop
for instrument loop is the signal from/to Controller(DCS or PLC or....etc) and this signal started from the instrument(valve or transmitter or...)to junction box to DCS through multi core cable.

What is the IEC Standard for PLC I/O Terminal wiring Procedure?

1 Answers  

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where cascade loop use ?

0 Answers   KNPC, KOC,

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how ranges is decided for drum level or dearator level,in my pplant i have seen for boiler drum range is -1000 to 1000mmwc, while for dearator -2000 to 0 mmwc ,why they decided to take this range ?

2 Answers  

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How to calculate the range of level transmitter?

4 Answers   Wika,

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difference between repeatability and reproductability

1 Answers   IOCL,

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why orfice is not used for main steam flow calculation

0 Answers   OEG,

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Sir, I want junior executive, Instrumentation question papaer for IOCL, Plz send to arabinda.ghosh83@gmail.com

0 Answers   IOCL,

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in the boiler in the main steam line and its bypass line and the startup vent vales are only motorised valves why cant we use other types of valves such as pneumatic.

3 Answers  

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T.x range -0.1 to 0.2 milibar,so how much mili ampear at 0.1 milibar?

7 Answers   Sugar Factory,

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Absolute pressure is 700psi,what will be the gauge pressure?

1 Answers   IFFCO,

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HOW DOES SPECIFIC GRAVITY AFFECT LEVEL MEASUREMENT.

3 Answers  

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please tell me how to convert double acting ytc positioner yt-1200 into single acting ytc positioner ?

1 Answers  

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