regarding level tx i would like to know how to select the range of the level transmitter in a closed drum(steam drum or deaerator)?

1 Answers  

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I faced several time siemens ps2 positioner automatically getting Chang in it's set point direction after auto calibration  So is there any causes biside this or  any  permissives ?

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Please can anybody help for control valve sizing step by step procedure?

0 Answers  

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I have a problem with a valve (air to close). When it is fully closed and try to open 1% it doesn't responce till 3% open suddenly more than 3% then back to 3%. I tried to tune positioner then removed it, the problem still exist. Any idea

3 Answers  

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what is modbus,profibus,fieldbus

2 Answers  

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How to calibrate a temperature transmitter & how a Cold junction Compensation will be carried out?

2 Answers   QAFCO,

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

0 Answers  

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Can anybody tell me the exact explanation for Functional calibration?When it should be done on process or on lab? Advanced Thanks

2 Answers  

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

1 Answers   Bapco Bahrain Petroleum Company, BMB,

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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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Why the Proximitor supply should be Negative voltage? Why should not we give Positive voltage to the Transducer?

6 Answers   Moser Baer,

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without a positionar can a control valve operate? give the difference of operating with positionar and without positionar?

5 Answers   IOCL,

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