Answer / manoj

First match zero of cv by callibrating zero error. If still the pressure transmitter/gauge shuffles value then there is passing in the valve

Answer / satya

give 100 % close command to cotrol valve if u phsically check valve is 100 % close the open the downstream drain valve if proces fluid comes then valve is passinf . if theie is flow transmitter before cv u can also check

Answer / harsh mehta

by zeigler nicols method,,,,,,we can do tht,bro

What is the detail function of I/O card in DCS ? Why we dont use the I/O directly with controller?

3 Answers   Kekran Mekran, TCE,

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why we are using magnet for calibration of gas detector?

0 Answers   NSH,

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admittance level sensor meaning?

2 Answers   CGL,

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You wish to SINK all my digital inputs to a PLC digital input card. Would you common out the leads to a positive or a negative connection?

1 Answers  

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what is function of ESD , and how is it work, explain with difination

1 Answers   Bapco Bahrain Petroleum Company, BMB,

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what is Instrumentation?

5 Answers   RCL, TCS,

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What is protocol ?

3 Answers  

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1. what is modbus cable? 2. what kind of communication we are using for the interface of DCS, ESD and Third party cabinets? 3. What is serial communication and peer to peer communication?

0 Answers  

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What is trim material . Why it is known as trim.

1 Answers   L&T, LNG,

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A DP transmitter is used to measure the level of an open tank. The drain line of the tank is connected to a control valve, and is configured as, if the level of the tank is 90% the valve should get open 10%. And if the tank level is 10%, the valve should get open 90%. Draw wiring diagram and explain how to configure DP transmitter and control valve using HART communicator. If the span error at output is 1%, what will be the %opening of the control valve at 60% level of the tank?

0 Answers  

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Explain about signal isolator

1 Answers   TCS,

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how to calibrate transmitter

3 Answers   Sabic,

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