What is hp & mp seperator .& what is its working principle ?

0 Answers   Chevron,

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How do bending tubing provide better measurement than using tubing fittings such as elbows?

0 Answers  

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what is the difference about HART, and 4-20mA signal?

8 Answers  

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What is PLC(programmable logic control)?

1 Answers  

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What are the automatic controller MODES?

2 Answers   DEWA,

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Hi friends, from Aug 4th onwards iam getting spikes for analog inputs in our DCS for a period of 800ms. I throughly checked every thing, finally i found that the DI, DO's from MCC panels shields are terminated in the Signal Earth where Analog Input signals shields are terminated. Is there any problem with this type of termination?. i checked the induction voltage from MCC and getting around 25VAC, please suggest me in this concern. Our plant is 8months old only. DCS is Siemens Make Simatic PCS7, and the transmitters are Yokogawa make.

1 Answers  

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what is instrumentation?

8 Answers  

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An RTD is a_________________________.it works as follows

2 Answers  

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If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , then it will reaches again 50%, this type of action occured frequntly.. so what to do for solve this problem. The possible cause is in volume booster or positioner's relay.. positioner is double acting .. and make siemens..sipart.The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?

2 Answers   Gujarat Fluorochemicals Limited (GFL), Shell,

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Transducer Input 0 to 230 v ac Output-0 to 10vdc Receiver Input 0 to 10 vdc and Output 4 to 20 ma How?

1 Answers  

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Why thermo wells are used? What materials are used in thermo wells?

0 Answers  

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which one is best profibus or RS485 for communication?

2 Answers   Honeywell,

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