Answer / vijayaprakash

integral role is reset the offset.

offset means error between present value and set point

Answer / sachin raikwar (the instruman)

In PID, offset is thr
due to proportional
gain. In proportional
gain, process value
never achieve set
point. It is more or
less than set point bt
near about set point.
This difference is
called offset.
Integral is used to
remove this offset.

Answer / deedar ali

in pid controller the integral use when propotional controller can not achive the set point this difference occur the offset remove the offset then we use the integral action of the controller

what do you mean by smart instruments?explain with example

4 Answers  

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How d.p. Transmitter can be applied to close tank?

0 Answers  

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I have observed in field instrumentation work... I remove the fuse of an analog transmitter then it shows 7.75 kg/sq cm (which is practically wrong value)in DCS and when put the fuse it shows 0 in dcs. Then cheach the field transmitter termination and found moister. clean that and then it shows 1.1 kg/ sq cm which is right value. Please describe the above phenomenon.

1 Answers  

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which are types of orifice tap ?

2 Answers  

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To calculate temperature, why we multiply 25 with mV?

2 Answers  

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suppose in dcs range of a flow transmitter is 10t/hr what is dp for 50% in 2500mmwc

6 Answers   Chevron,

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What is shriking and swell effect for a boiler ?

1 Answers  

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What does PCU means with respect to Dead Weight Tester?

1 Answers   SGS,

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what is consistency transmitter and describe its working?

1 Answers   Emami,

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how to measure draft pressure in transmitter pl. give its single line digram

0 Answers  

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3element

2 Answers  

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for oil & gas industries which zone is normally preferred? why? give its example?

0 Answers  

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