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Define the difference between a stable versus an unstable controlled system and some of the tools you might use to be able to detect when this is happening and assumptions used for control system application design that could contribute to instability

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Coal mill Instruments Equipments for cement plant And process diagram ?

0 Answers  

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What is mean by Adapter block and net block?

1 Answers   Hospira,

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We do have a problem in the company that is one PT connected to PlC which is mean 1 out of 1 in PLC system we do have the PAHH is 55 mbar and PALL 8 mbar with a timer of 15 sec for the PAHH the problem started when PAHH goes more than the set point which is 55 it reached up to 71 but due to timer doesn't trip . We force it and we checked everything nothing there . We replaced the transmitter problem still there the reading goes more than the 55 bar the range for transmitte is 0- 60 mbar . So we did loop check , aculaizing valve , wiring all are okay . What the possible causes for this ???

2 Answers   National Petrochemical Company,

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what is zero trim and span trim?. at which problem we need to use this?

3 Answers  

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How to convert milliampares into flow??

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why r using 250 resistances

6 Answers   Sabic, Samsung,

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what is the advantage of submersible level transmitter compare to ultrasonic level transmitter?

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it is possible to check the fail safe condition in pressure transmitter. if possible how?

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what will the sending unit in the fuel gauge utilizes?

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How to convert 0-2500mmH2o into kg/hr? Or how to convert mmH2O into kg/hr,t/hr etc

2 Answers  

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what are the steps to commissioning a DCS system?

2 Answers   BGR Energy,

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