Interested to Buy Any Domain ? << Click Here >> for more details...
1,why we use 4-20 ma output of all instrument qhy not use 0-
20,
2,what is the different between PLC & DCS.
3,how can we meaure maximum span of new flowmeter if not
given any information.
- 4 Answers
- 12690 Views
- Reliance, I also Faced
- E-Mail Answers
Answer Posted / narendra mishra
suppose 0 to 20ma is used where 0 for
min.process value and 20 for max.then if
feed back cable get shorten or erthed or
broken it wil show min process value.where
in case of 4 to 20ma it will show "bad".
Plc are used to handle specific area where
DI DO signals are required like burner
managment system.plc response time is in
milisec. And that of dcs is in microsec.
Max span can be found by taking it online
and interfacing it with HART.
| Is This Answer Correct ? | 13 Yes | 4 No |
Post New Answer View All Answers
Which types of quections asked in interview for FORMULATION PLANT (PHARMA)
What is the function of solenoid valve in on/off & shutdown valve and why it is not used in control valve normally?
need instrumentation job completed 1 year trainee ship in mnc pesticide company. now in search of job
State bernoulli’s application.
all questions related to instrument technician in any offshore oil and gas company.
what is the importance of CV in the control valves? how it is calculated?
what is the difference between attemperator and desuperheater ?
How we calculate orifice plat size???
What is sensitivity in vibration probes..?
What are different types of orifice plates? State their uses.
how to measure oxygen which methods are using?
what is instrument philosophy
what is the procedure of belt scale calibration?
where uses EXe /EXd/Exo/Exn/Exp/Exq/EXia
Explain signal isolator
