What is the difference between radar and ultrasonic level transmitter? Which method is best and more accurate?

8 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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Sir, I am working as a Instrument Engineer in Grasim Industries. Can any body provide question answer for interview purpose

0 Answers   Grasim,

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can any one give me the cost price of yokogawa & rosemount transmitters

4 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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What is stripper & spilitter ? Diffrence in this.?

0 Answers  

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what is the difference between SCADA and DCS?

5 Answers   ACC,

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

0 Answers   ADMA OPCO,

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Can anyone explain about ELectropneumatics principle?

1 Answers   Forbes Marshall, Step,

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what is meant by nuclear power plant?

1 Answers  

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why do we use 4-20mA as o/p and why don't use 0-20mA or 5- 21mA?

3 Answers  

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why to use 3 wire at RTD ? what's the reason for common wire ?

4 Answers  

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