what is the thermocuple compensation circuit

3 Answers  

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why does mA signal preferred for signal transmission?

12 Answers   Emerson,

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In turbine, what does term CDP, NI, NH, HSSOC, means

0 Answers   ADMA OPCO,

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What is the meaning of Dry contact and Wet Contact related to to sensors?

5 Answers   Emerson, Google,

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send me HPCL paper

6 Answers   HPCL, Shuiba Hotel,

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Define cryogenic?

0 Answers  

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On drum level, why we are using air to close Control valve?

4 Answers   L&T,

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Draw a complete P&ID of a flow suction tank indicating all control & protection equipment. Indicate all its inlets and outlets. Explain the controls for this system

0 Answers  

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Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =

0 Answers  

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How to define the size of control valve?

5 Answers  

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Vibration probe working principle?

1 Answers   Tata Steel Limited,

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how to convert digital signal to analog signal in plc

1 Answers   UltraTech,

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