Answer / smita

RS232 is a full duplex cable means both transmitting and receiving happens at a time due to this noise will be more so that we can't go for longer distance

RS484 a half duplex cable means in a single time either transmitting or receiving will happen so we can go for a longer distance without disturbance

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0 Answers   GE,

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what is the function of 3 way manifold valve in a closed loop system?

1 Answers   Emerson,

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Pl send the model question paper of mahagenco account officer post

0 Answers   MahaGenco,

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What is hp & mp seperator .& what is its working principle ?

0 Answers   Chevron,

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what is cavitation in control valve? & how we can avoid it?

1 Answers   Forbes Marshall, Reliance,

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What is a snubber circuit?

2 Answers  

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types of valves

3 Answers   Bindal Papers, Kuwait Oil Company,

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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 do u mean by compensation n pid tunning?in pid tunning what you tunned?is it possible 2 tune p i d

2 Answers  

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What is safety barrier and how it is work

2 Answers   IOCL,

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how can calibrate vacume trasmitter by HART COMMUNICATOR ?

3 Answers   Bajaj, IMECO,

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please any body have most important data for study for saudi aramco test of instrument QC thanks email shahnaveedullah@gmail.com

0 Answers  

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