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

8 Answers   Emerson, IEM,

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What is the use of valve positioner?

1 Answers   CCIE,

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Q- voltage source of 12v is driving the circuit.if circut draw the current of 0.5A them source voltage will became 11.8v.what is the power dilevered by source when circuit draw 5A current ?

4 Answers   Ecil,

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Why 4-20 amps is being used in instruments? Why cant we use any other range instead of 4-20 amps? Why only 4 amps is taken as lower limit and why 20 amps is taken as the higher limit?

0 Answers  

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what is the difference between active and passive loop ?

8 Answers  

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i want interview questions about PROCESS CONTROL INSTRUMENTATION , SENSORS AND TRANSDUCERS IF ANY BADY KNOW ABOUT THAT PLEASE SEND TO MY MAIL karumudi1003@gmail.com

8 Answers   Honeywell, Reliance,

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draw the characteristics of chebyshev filter

0 Answers  

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How will you change the action of a control valve?

1 Answers   CCIE,

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how to measure oxygen which methods are using?

0 Answers  

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what is difference between accelerometer vibration sensor and proximity vibration sensor

3 Answers  

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what are the installation requirement is common to all flow meter when volumetric flow rate is being measured

1 Answers  

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Wht should be the ratio of natural frequency (Fn) to wake frequency (Fw) and wht if goes above the rato limit?

2 Answers  

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