Interested to Buy Any Domain ? << Click Here >> for more details...
why we take 4 to 20 mA as out put of every instrument like
pressure transmittre ?why we cant take 0 to 20mA as output?
- 6 Answers
- 11220 Views
- OGDCL, I also Faced
- E-Mail Answers
Answer Posted / ritheesh kumar.p
why not take 0-20mA the reason for this is when 0 is
considered as minimum value then we will get 0 as output
when no signal is coming,when the instrument is not working
or there is any fault in it we get 0.inorder to ensure that
the instrument works we choose 4-20mA as standard output
value.4 corresponds to no signal from the instrument. 20mA
is the maximum value because below 20mA we will be able to
avoid schocks and short circuits
| Is This Answer Correct ? | 32 Yes | 2 No |
Post New Answer View All Answers
How to convert Differential pressure to flow in TPH
What is frequency factor in massflow meter? When using frequency output?
ORP sensor working principle?
what is exact time to study dcs and plc cources
Why grounding is necessary? Give example with diagram.
why is an oxygen sensor used in a boiler stack
When doing a liquid seal on a differential flow transmitter , most of the time the sealing liquid will be heavier then the process fluid. For wich application will the sealing liquid be lighter than the process fluid if transmitter is mounted below the process line.
Q- Control problem are mainly classified in _____ types. a-)4 b-)3 c-)6 d-)nono of these Few of them i know is 1- regulator type problem (eg- Air conditioner) 2- tracking problem (eg missile trcking problem) 3- sybernatics 4- optimal control problem
any questions on motor and energy conversions machines?
How a conductivity sensor & analyzer work at boiler, whats the principle & science is beyond this,How conductivity sensor sence & convert signal & move toward analyzer & analyzer show reading in percent? also what is temperature compensate option in conductivity analyzer
Q- What are the application in which PNP transistor is preferred over NPN ?
diff between neutral ,ground,phase , earthing and shielding?
Explain the mechanism behind the turbine meter.
What is Span Error
What is limitation of the ht.of the displacer of a level trol?
