Why DP level transmitter preferred for closed vessels and Radar level transmitter for open tanks??

2 Answers  

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In E&I diagram what is the meaning of rectangular box and circular box

3 Answers   L&T,

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why we are using -24 vdc in plc?

1 Answers   CGL,

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What is the difference between a PLC (Programmable logic controller) and DCS (distributed control system)?

7 Answers  

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What is the difference between HMI,SCADA and MMI,not abbrevation?

7 Answers   HCL,

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We do have a problem in the company that is one PT connected to PlC which is mean 1 out of 1 in PLC system we do have the PAHH is 55 mbar and PALL 8 mbar with a timer of 15 sec for the PAHH the problem started when PAHH goes more than the set point which is 55 it reached up to 71 but due to timer doesn't trip . We force it and we checked everything nothing there . We replaced the transmitter problem still there the reading goes more than the 55 bar the range for transmitte is 0- 60 mbar . So we did loop check , aculaizing valve , wiring all are okay . What the possible causes for this ???

2 Answers   National Petrochemical Company,

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What is difference between flame retardant & flame resistance cable? Among which type of cable is used for ESD & Fire and Gas system application?

1 Answers  

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we callculat main steam flow by D.P. but where is H.P. & L.P. IN Orfics?

3 Answers  

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Operational amplifiers

0 Answers   CCIE,

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What standards are used for earthing of field instruments?

1 Answers  

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what is rtd

4 Answers   Petrofac,

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How to convert ma to mv? Resistance 250 ohm is connected in series or Parallel?

3 Answers   ISRO,

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