Answer / omak

In DCS system , their is an option called third party interface.this third party interface is mostly in serial communication method. so by using the third party interface card, we can connect the PLC using serial communication method.

Answer / abdul rahim

we can connect the third party in dcs by using the Profibus
serial communication.

what is the difference b/w magnetic flow meter&mass flow meter? which one is best?

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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what are the inputs (drawings) we need to prepare loop schematics??

1 Answers  

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Can anybody tell me how to select the size of earthing cable for DCS & PLC system.Please tell me any relevant answer here or mail it to me.

0 Answers   Essar, Sail,

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Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72

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Qatar fertilizer call me for interview as Instrumentation Project Engineer. Please let me know what kind of question they asked ? ALso they said they will take Written test, any idea about this written test ?

1 Answers   QAFCO,

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What is the difference between intrinsic instruments and ATEX instruments?

1 Answers  

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What is rated capacity in Control valve

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How to check range of DP Transmitter

7 Answers  

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units for vibration in power plant

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During valve sizing from all calculation you got flow coefficient CV 12,than what it means? like for selecting pressure transmitter if your MAWP is 12 bar than you select a capsule of max. 20 bar which cover your mawp 12 in same way for selecting control valve If CV is 12 than how we use it in selecting valve??????

1 Answers  

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why are set -10vdc in bently neveda vibration system.

4 Answers  

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