Answer Posted / veera

transmitter output are AI ,
control valve input are AO ,
all process variable switch are DI,
SOV and light on starts condition are DO,

how we are selecting instuments by differentiating certain instruments in 4 to 20 ma range and certain in 1 to 5 v dc

2065

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can you provide me full detail about instrumentation in ONGC??

2161

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Area classification, Equipments, Gas groups, temperature classification, Ingress protection, Fire Extinguishers.

1972

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why any measurement made interms of pressure is more accurate ? to be more precise most of the flow velocity is made interms of pressure and it is accurate. what is the reason behind pressure measurement being accurate ?

1896

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What is zero elevation and zero suppression?

2149

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we have level transmitter for h2s04 storage tank capacity 10k ,always there are failure of transmitter due to failure of magnetic floats ,please come up with solutions at the earliest.

2052

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how pressure transmitter work, what is its principal to measure and how its generate signal. for pressure transmitterinstallation which precautions must be taken ??

1742

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Can any one send me IOCL instrumentation question papers.. i dont know the pattern of the questions and what to prepare can any one help me on this .. my email id is anwarnishil@gmail.com

2245

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while i check zero check for dp flow transmitter some fluctuating came (0 to 458 kg/h) what is the reason?

1890

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Why the ammonia and Nitric Acid level indicators is with millimeter ? and What is the conversion form millimeters that level indicator indicate to weight ?

1823

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Calibration procedure for water rotameters

2187

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How to check vortex flow meter is in good condition while we do not having calibration setup?

8940

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why we are using magnet for calibration of gas detector?

2243

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how can i check vortex shedder bar it is ok? if there is ohms condition are shown correct?

2214

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Explain about the leakage class of the control valves

1988

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