Why the industry's standard current standards are from 4mA to 20mA,not from 0mA or any other range?

3 Answers  

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Why the Air Tank Accumulators required for the single acting actuators SDV's or BDV's as I see in some Schematic diagrams of ROTORK ??

2 Answers   L&T, Siemens,

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how is work pressure switch& level switch?what is the principle of this?

0 Answers   Binani,

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i have height of stem drum level 1000mm.how i calculate the DP transmitter

2 Answers  

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Explain the mechanism behind the turbine meter.

0 Answers  

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what is the input of ph sensor and meter during the calibration time and what is the output?

1 Answers   Sabic,

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how can we caliberate interface level troll

2 Answers   Grasim, IOCL, KOC, Sankyu,

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What is Span Error

0 Answers  

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give me all the details about the interview and which type of question being asked

0 Answers   Jindal,

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we are having yokogawa centum cs3000 dcs in our power plant. i need some of the operator guides NOT to appear in HIS0163 AND HIS 0162 but it shoul appear in HIS0164 HOW TO DO IT?

0 Answers   Yokogawa,

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what is zero trim and span trim?. at which problem we need to use this?

3 Answers  

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why t/c is connected parallel and what is the purpose of it

2 Answers  

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