Answer / varatha

transmitters analog input,
control valve analog output,
Limit switches digital input, like motor on
command digital output.

Answer / king khan

Yes

what is ILD

1 Answers  

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What is three element drum level control system why its better than single element?

0 Answers  

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i have steam drum height 1000mm. and i want to placed the transmitter below the tap.how i calculate.

0 Answers   OEG,

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What is the working principle of the magnetic meter?

0 Answers  

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How to rerange a dp type level transmitter after installation?

1 Answers   NSH,

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Define all the process Variable and state their unit of measurement. ?

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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In 16' pipeline one pcv is installed which is controlled by PT installed at inlet of PCV.If Flowrate in pipeline increases what will happen to pressure at the inlet of pcv.

5 Answers   Essar, vssc,

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What is the diffrence between digital signal processing and discrete signal processing?

0 Answers  

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Please send me the sample question of Instrumentation of hpcl/iocl exam. my mail id hihi_kiholo@rediffmail.com

0 Answers  

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Pls can anybody tell me how much memory plc's has?in byte or in Kb

2 Answers  

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What is zener diode? What is voltage regulator?

0 Answers  

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