what is difference between OP AMP and differential amplifier?

5 Answers   TCS,

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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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what are the documents(Construction point of view for a process plant) submitted by contactor initially entering in to new site for client?

0 Answers   NTPC, PSU,

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TEMPERATURE VARIATION FOR FREQUENTLY.

0 Answers   TVS,

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please explain clearly in PID controller if We increase P only what will be action of the contrlere.

1 Answers   IMECO,

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WHAT IS DOPPLER EFFECT? WHERE IT IS APPLIED?

1 Answers  

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what is the Analog signal and what is the Digital signal

4 Answers  

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How to define the size of control valve?

5 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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what do you mean by smart instruments ? define ? give an example?

2 Answers   Flour Tech Engineers (P) Ltd,

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how to design orifice plate?what is the equation?

0 Answers   REL,

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In a class of 150 students, 40 passed in Social Studies, 90 passed in Science and 30 failed in both the subjects. vi)How many students passed in at most one subject among Science and Social Science?

7 Answers   CAT, CGI, Cipla, KHK, Visa,

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