What is the reverse action and direct action

2 Answers   Samsung,

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What is shriking and swell effect for a boiler ?

1 Answers  

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why we use 4-20 mA for calibration of the instruments.why we cant use 0-20 mA?

5 Answers  

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How many ohms are required for proper earthing?

0 Answers  

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TRANSDUSER MOSTLY CONVERT WHICH ENERGY INTO ENERGY ?

6 Answers   DVC,

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what is the diffrence between pressure safety valve & pressure relief valve....pls

0 Answers   Oil India,

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How many types of Control Modes in process control, plz tell me all.....?

2 Answers  

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How to make position transmitter feedback reverse i.e at valve close i want 20ma output and at full open 4ma.for the NELES positioner,model:ND8261/TS1.

3 Answers  

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what is the difference between venturi and orifice meters?

9 Answers   Medha Servo Drives,

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What is cv of control valve

4 Answers   Cadila,

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I have observed in field instrumentation work... I remove the fuse of an analog transmitter then it shows 7.75 kg/sq cm (which is practically wrong value)in DCS and when put the fuse it shows 0 in dcs. Then cheach the field transmitter termination and found moister. clean that and then it shows 1.1 kg/ sq cm which is right value. Please describe the above phenomenon.

1 Answers  

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how u choose thermowell lenght n pnumatic C/v size?

0 Answers  

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