WHY WE USE 4-20mA

Answer Posted / therion

for eg. if we are monitor a flow tube and measure the rate
of flow through the tube or pipe then 4mA will represent
ZERO flow and 20mA maximum flow..if it drops to below 4mA
then it shows reverse flow (which is not good)

Is This Answer Correct ?    4 Yes 3 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

why are distributed windings generally used in alternators?

2285


in power generator normaly voltagr betwween esth to neutral is 0 but my work place generator show the volatge is 60v any body know why? thanks

1407


How to set a Zone 1 distance relay for distribution feeder?

1528


Pleae send me last 5 years of Question book about RRB chennai.

1801


What is difference between YNyn0 and YNyn ??

1800






Sir, plz tell me how droop setting is done in parellel operation od DG set ? please give practical example ?

1661


Why a Permanent Magnet Generator has higher frequency as compared to frequency of main alternator?

1408


TRANSFORMERS WITH DC SUPPLY

1510


How to select cable the size, what is the parameters use and what is the formulas use for this cable size calculation?

1400


what are the problems that generally occur in power flows??

2531


how braking & making capacity of circuit breaker are calculated?

1840


What is relation between transmission lines & Communication lines ?

1685


Why does the rotor rotate?

1799


how does directional relay work incase of ac ?

1008


Differentiate between low pass, high pass and band pass filter?

611