1.what is controller proportional gain 2.what is the controller intergral action time. 3.A proportional plus derivative controller that has a proportional band of 20% and a derivative action time of 0.1 minutes. Construct the shape of the output waveform for the triangular input if the input rises and falls at the rate of 4 units per minute.

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what is dedband in instrumentation ?

3 Answers  

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hi all plz tell me difrence between analog or digital load cell.

2 Answers  

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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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Troubleshoot to the device level basic process control systems given the Process and Instrumentation Diagram?

2 Answers   Chettinad, HPCL,

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What is Difference between Bench Set & Operating Range of Control Valve?

1 Answers   AB Sugar,

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What is Integral and Derivative control?

5 Answers   Qatar Petroleums,

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what is meant by turn down ratio?

3 Answers   Avant Garde,

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1. How can leveltrol be installed in steam drum for measuring the level of steam drum?

1 Answers   Fischer,

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Hi, am aniket, I got engineering degree in instrumentation and control, but as their were no job availabilities for engineer's post I started working as instrumentation technician I kuwait, so my question is is this technician's experience worth for getting the position of engineer?

1 Answers   Almeer Technical Services,

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Can anyone send most commonly asked interview question in Oil & Gas industry

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Why MUX JB's are using only Temperature Element in Fundation field bus?

0 Answers   Reliance Industries,

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