Interested to Buy Any Domain ? << Click Here >> for more details...
Why most of analog o/p devices having o/p range 4 to 20 mA and
not 0 to 20 mA ?
- 2 Answers
- 5884 Views
- I also Faced
- E-Mail Answers
Answer Posted / ekailash
4-20 mA is a standard range used to indicate measured
values for any process. The reason that 4ma is chosen
instead of 0 mA is for fail safe operation.
For exa.- a pressure instrument gives output 4mA to
indicate 0 psi, up to 20 mA to indicate 100 psi, or full
scale. Due to any problem in instrument i.e. broken wire,
its output reducess to 0 mA. So if range is 0-20 mA then we
can differentiate whether it is due to broken wire or due
to 0 psi.
| Is This Answer Correct ? | 9 Yes | 0 No |
Post New Answer View All Answers
How many types oil using in transformer ? How many letars using in transformer..?
I want formula to calculate current loss with distance in km.I searched many sites but didn't right answer.Plz reply me
what is the significance of cabability curve of alternator
How do u analyse protection fault when vcb tripping on load
what is the breaking capacity and making capacity of circuit breaker and how
What is genrally the % Impedance of a Dg set? How can we calculate Earthing conductor size for a DG set?
what is the illumination level required for child play area?
What is accuracy of a measurement?
What is meant by short-pitched winding?
if the number of poles generated in stator and rotor side of an induction motor are different then what will happen and why?
what is the Pickup/drop off ratio in BCPU relays
what are the application of over current relay?
HOW WORK HEAT PLATE EXCHANGER
Why it is possible to use PWM with a STATCOM and not with a conventional TCR based SVC
How we can defined theecopper cable size if we know the aluminium cable size?
