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 conductivity sensor output formula and what is the ph sensor output formula?

1 Answers  

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cascade controller is feed back or feed forward or both

4 Answers  

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State four different types of flow measurement.

4 Answers   ADMA OPCO,

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what is the reason for flow fluctuations happen on differential flow transmitter during in service

2 Answers  

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Can we place a Control Panel in Hazardous area Group IIC ? If 'yes' then is there any approval required? If 'yes' then there is any specific IP rating or any standard required? If 'Yes' What is MOC of control panel?

2 Answers  

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How to find out turn down ratio of Pressure transmitter?

1 Answers  

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can any one explain in which term we are flow flow is it volumetric r is it mass? and y

0 Answers  

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How would you choose differential range?

0 Answers  

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what is formula for calculating flow if i have pressure and pipe diameter?

1 Answers  

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WHAT IS AN INTERLOCK SYSTEM ?? HOW THEY WORKs ?? WHERE IT IS USED ??? MAINLY ??

2 Answers   TATA, Tata Steel Limited,

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Meaning of the following a. IOP- Manimum; b. IOP- Maximu,;

0 Answers  

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please tell me how maintainence person shifted to good epc company/design company

0 Answers  

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