Answer / koolfire

P,PID controller'S are used to tune the output to a desired value.
however for proportional controllers it always has a steady state error as the output will never reach the desired value but will be close to it.

For  a PID controller due to its integral and derivative action(rate of change of error), it cancels out the steady state error.

why in vortex flow transmitter dcs range is configuring less than sensor range. eg (sensor range 500-25000 kg/hr and dcs range 0-24000 kg/hr).

1 Answers   Daelim,

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what is the input to be given digital temp controller during the the calibration time?

2 Answers  

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Could you explain to me the enraf (servo gauge) mechanism. How it works ? and how it is working on archimedes theory while it's not immersed into the surface? and how can we calibrate it ? Thanx

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which flow meter is use for measuring the open channel flow?

2 Answers  

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while i check zero check for dp flow transmitter some fluctuating came (0 to 458 kg/h) what is the reason?

0 Answers   Petronas,

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if temperature transmitter is showing wran. sensor 2 fail how can you remove from the transmitter display m/n.3144p rosemount

3 Answers   Baumer,

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How the warning lamp of a charging-system is activated ?

0 Answers  

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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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WHAT IS D/O D/I AND A/O A/I PLZ EXPLAIN

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wat are the interview questions asked in air india for post service engineer

1 Answers   AirIndia, Shree Renuka Sugars,

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why OPC server is used in DCS?

2 Answers  

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When a field input to plc is coming from 400 to 600 meters and the input is in 24 V DC? So signal cable of which cross section i should select for proper signal to plc?

5 Answers   Exxon Mobil,

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