Answer / Vishal Modi

Installing a pressure transmitter below the elevation of a pipe in natural gas service could result in improper readings due to the presence of condensate or liquid accumulation within the pipe. This would cause a false pressure reading, leading to incorrect process control and potentially damaging the transmitter.

i have one tank of 500mm height, which is in under vacuum of 735 mmHg, I want measure level of the same using DPT , SO WHAT WILL BE THE URV & LRV, DENSITY OF THE TANK FLUID IS 0.95. is there necessary to fill the LP side with fluid.

7 Answers  

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radial & axial vibration sensor output voltage is ac or dc volt?

8 Answers   Vedanta, Voltech,

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How an rtd work, and what volts/current goes to a rtd to measure the resistance?

1 Answers  

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principle of automatic votage regulator

1 Answers   Bhel,

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How to change dcs card in online. (Dsc is maxdna)

1 Answers  

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what r the different types of instrumentation cables? give their specification?

3 Answers  

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How addressable fire systems work? Pl. send details with architect.(Loop), also send details regarding Gas system. Pl. help me.Thanks

1 Answers   Siemens,

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can u guys tell me why we are using sheild in junction bos wiring ~! ?

1 Answers  

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Sir i am preparing for PSU exam for ONGC but i am not able to get the appropriate syllabus and previous year question papers. Kindly send me the same, that will be a great help from ur side. OR if anyone can plz send me the papers and syllabus please.

11 Answers   Bhel, GAIL, IOCL, ISRO, NTPC, ONGC,

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In oil & gas industries and petrochemical industries, there are classification of zones like zone 0, zone 1, zone 2. Is there any differences in voltages or power supply supplied for the process instruments, control instruments depending on the zones

1 Answers  

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How is plc installing done

3 Answers   L&T,

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In RTU Panel we are having several Analogue & Digital Inputs /Outputs. We are recently facing some problems over Analog inputs , which are not updating properly (But Digital Input are updating normally) Can any one tell me from where the problem is creating , we have checked PLC CPU card, Analog Input card & we reconfigured ,But still the issue is there. Issue : 1. Sometimes Analog values are updating & sometimes not. 2. Analog values are not updating normally , showing some wrong Values 3. Total dead (0 value) Analog values are Level & flow measurement from the field instruments. (But in field the instruments are working normally & Displaying the values normally in local display unit) This problem we are facing in our Water Plant. If any one experienced this same problem or having any ideas related to our issue PLS send your valuable Answers/Replies...

6 Answers   L&T,

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