what is the difference between two wire transmitter and 4- wire transmitter

3 Answers  

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Possible cause of IOP alarm in a DP transmitter: a: IOP-minimum b: IOP-Maximum

4 Answers  

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Explain the working principle of variable frequency drive?

0 Answers   ABB,

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i want to find out iffco get test paper

2 Answers   IFFCO,

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Manipulation of dead wt. tester double piston type.

0 Answers   CCIE,

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In my company plc based winders are operated. one day there was a data transmission failure alarm shown on pc. as per sir instruction we have reset master plc but winders were not triped and alarm gone. so what master plc do?

0 Answers  

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plz tell me clearly about PID.."when v have to change I value,D value,GAIN??

0 Answers  

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in control valve is constructed as per API 6D or API 6A, then which standard is used for fire testing of valve?.

1 Answers  

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how to know power plant process with corresbonding laws&thoeries

1 Answers   Bhel,

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hi i want sov loop cheak from consol to field the operater given status to sov still no change, but MR room to sov ok so whats a problem and alreasy cheak all conection ok ?

2 Answers  

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How many problems can be occurring in solenoid valve? And how it can be rectified?

1 Answers   Adgas,

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What is loop or pigtail in an impulse line?

8 Answers   Qatar Airlines, Qatar Petroleums,

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