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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what is difference between hart signal and analog signal (4 to 20 ma)

2 Answers   Takreer,

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Can you tell me how we will select RTD and Thermocouples for Temperature applications. I.e How we will choose accurate one for a specefic operation if both having same ranges

3 Answers   Nippon,

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how to calculate range of level transmitter?

0 Answers   TCE,

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For crude application in floating roof tank, how to calibrate a DP Transmitter? How is the floating roof weight considered?

0 Answers  

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Please send the all question with answer related for interview.

1 Answers  

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What is the expansion of RADAR? How it works?

7 Answers   RasGas,

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how many type of plug are used in pneumatic control valve,name them.

2 Answers   Godrej,

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Please send me the sample question of Instrumentation of hpcl/iocl exam. my mail id hihi_kiholo@rediffmail.com

0 Answers  

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What is passive connection of instrument in different types of IO module?

2 Answers  

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plz send me placement paper of ongc

0 Answers   ONGC,

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why the supply frequency used in America is 60Hz while that used in India is 50Hz?,

2 Answers   Bosch, Genco,

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