Answer / prashant sanas

What is the difference between PLC and DCS control system?
PLC is an completely industrial automation system, where as DCS is an computerized control system.
PLC is economicaly low cost, but the DCS costs high.
Also,
DCS stands for Distribute control system
Actually DCS is a network hub which can collect the Required Info from the other PLC's (say 2 or 3 & so on..) and then processed it... to get the full info about the Plant Operations(say current rating Temp. voltage load and Power Factor etc)..
ok

Answer / ajit kumar samal

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how can i calibrate E & h make conductivity transmiter . unit : mocro siemens Range :0 to 100 micro siemens sensor : capacitive type

1 Answers  

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what is the function of a diaphragm?

1 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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send me model hpcl questions pleas..........my mail id mohideen.dharvesh@gmail.com

0 Answers   HPCL,

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Name different parts of a pressure gauge. Explain the use of hair spring in the pressure gauge.

0 Answers  

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Someone please do mail me some instrumentation questions for Hindustan Petroleum test to avinalexander@gmail.com .Really would be gateful if someone could help me

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define feed forward control loop with example and drawing?

0 Answers   Honeywell,

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why we use 0.2 to 1.0 kg/cm2 output in control valve

4 Answers   GNFC,

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where i can get training in INTOOLS and PDMS in Delhi-NCR OR north part of India. please reply with ur ans. at arunsamkaria@ymail.com

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Explain why plc require in analog input 4-20amp & 0-10 volt?

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What should we do when Fisher Fieldvue DVC2000 give some out put air at 4mA bt at that i need no out put

1 Answers  

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where is a level displacer is used?

9 Answers  

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