what is difference between hart signal and analog signal (4 to 20 ma)

2 Answers   Takreer,

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I have a problem with a valve (air to close). When it is fully closed and try to open 1% it doesn't responce till 3% open suddenly more than 3% then back to 3%. I tried to tune positioner then removed it, the problem still exist. Any idea

3 Answers  

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Which type of pressure can be measured by these elements?

0 Answers  

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what is plc? Basic function of plc? application of plc in industry? What is lader diagram ? What is the main advantage to use plc in industry?

15 Answers   Schlumberger,

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what is the calibration procedure for magnetic flow meter @ onsite

0 Answers  

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what is vibration sensor working principal and how many types its has??

5 Answers  

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what is pico fuse? how this different rom othe fuses and how to locate it inside the card?

1 Answers  

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What is the difference b/w EMF, voltage & potential difference?

1 Answers  

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flow transmitter formula?

0 Answers   BEMCO, Siemens, Yokogawa,

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what is Automation?

3 Answers  

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when the instrument tapping on pipe line is located below and transmitter is located above the tapping point for liquid service transmitter, what should we do, is there any additional drain valve is required??

0 Answers  

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how to calibate level transmiter ?range -150 to +150.what is the zero and span?

1 Answers  

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