How do bending tubing provide better measurement than using tubing fittings such as elbows?

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How to calibration a control valve?

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Please can anybody tell me the step by step procedure for calibrating the Pr,Lvl,Fl,Temp transmitter on process?

1 Answers  

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who discoverd ohms law?

3 Answers   HPCL,

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in valve is constructed as per SME B 16.34, then which standard is used for fire testing of valve?.

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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 =

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hye SAM acn u send your e mail id, so that i can solve my query through e mail?

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what type problems create in radar level transmeter and what is its solution

2 Answers   Essar,

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IN JB CONSTRUCTION WHY WE ARE USING JUMPPER........CAN U PLEASE TELL ME.....

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Why we use DPT? can we use PT instead of DPT?

2 Answers  

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WHAT ARE MAIN DIFFERENCE BETWEEN DCS AND SCADA?

7 Answers   ABB, Gold Fields, Rand Water,

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what is intrument termination what is commisioning

3 Answers  

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