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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What is PDS and PDMS ?

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LADDER LOGIC Can any body state Logic on following condition Instructions to use 1-XIC 2-XIO 3-Output ONLY Program Push 1st button On - 1st lamp should On Then Push 1st button Off - 1st Lamp Should remain on Push 2nd button On - 1st lamp should Off and 2nd lamp should On Then Push 2nd button Off - 2nd Lamp Should remain on.

4 Answers  

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can you give some devices that measure directly the mass flow rate.

1 Answers   Takreer,

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why we cant transmit the dc current easily

1 Answers  

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canu tell me why 4-20 ma and why not this 3-25ma?please give reason of this value.

6 Answers  

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generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?

1 Answers   Indian Steel,

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I am using 971 Enraf radar level transmitter for LPG tanks ,the tank side indicator gives the error code 999999999FL can any body give me any diagnostic for this issue?

0 Answers  

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What is an analog input - output , digital input - output . Any example ???? How they r known its ai-ao or di - do

4 Answers   Torrent Pharma,

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how u calibrate sox nox co2 co in cemps?what is opacity n HPm?tell the standard parameters of cems?

0 Answers  

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Can I calibrate the Electromagnetic Flow Meter on line and How.

0 Answers   SEWA,

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What is the purpose of LO Overhead tank in turbines.

0 Answers   ADMA OPCO,

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