Please why do we use 4-20ma in instrumentation engineering

1 Answers  

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what is datum line?

4 Answers  

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If we increase only P what will be controller action ?

0 Answers   IMECO,

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what happens if we are having very very high cavity and flashing in a control valve..??? is it stops working...immediately... or eroded...slowly

2 Answers  

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why cant we use mV instead of mA?

12 Answers   ABB, Power Grid, Qatar Gas, USW, Visa Steel,

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Troubleshoot to the device level basic process control systems given the Process and Instrumentation Diagram?

2 Answers   Chettinad, HPCL,

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PLZ explain to me massflow

4 Answers  

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how to convert cubic metre per hour to newton cubic metre per hour

0 Answers  

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What is offset in a control system.

2 Answers   Sabic,

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I am working in a process industry, in that there are several sections devided in the SCADA screens and individual sections may START independently. But sometimes i am facing problem i.e, if section 2 Stopped by the operator immediately Section 1 or Section 3 or Section 4 is getting stopped can you expain the reason behind this?

5 Answers  

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How can i test procedure grounding for CAT-7 cable? Or How can we test procedure CAT-7 Cable Electrically safe?

0 Answers   Tecnimont,

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whats the problem will arrise if we rotate the hosing screw of the differential pressure transmitter?

1 Answers  

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