In control valve proximity inductive sensor is taken as digital feedback for full open and full close.Normally its volts 24v when the sensor acts the feed back voltage 14v so that our relay not indicating in plc panel . kindly give the solution.

0 Answers  

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hello friends, can you please send me the model paper or question paper to be prepared for hpcl examinations????????? You can mail me at rahim_here@yahoo.com waiting for your reply........... help me .. plz.....

0 Answers  

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If we interchange HP and LP tapping in drum level measurement and reverse LRV & URV correspondingly.What is the difference between the normal tapping(HP,LP) and reversed tapping(LP,HP)?

2 Answers  

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what is the reason while warning lamp is on while the engine is cranking?

0 Answers   Jindal,

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What is the difference between PLC-HMI and DCS as each function of DCS based system is possible in PLC ?

2 Answers   Lucky Cement,

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compare the thermocouple and pyrometer,which one is the best?why?

4 Answers   Ramco,

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In control valves (like feed water control valve) we will give 3 kg pressure and how it controls 110 kg of water pressure?

4 Answers   SSL,

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

1 Answers   Bapco Bahrain Petroleum Company,

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What is mean by Adapter block and net block?

1 Answers   Hospira,

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What is Trim?

1 Answers   Gujarat Borosil,

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Ohm’s law, kirchoff’s law, pascal’s law, Bernoulli’s therem,

1 Answers   CCIE, Emcure,

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how to calibrate load cell

0 Answers   Siemens,

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