Interested to Buy Any Domain ? << Click Here >> for more details...
why 4-20 mA signal is preferred over a 0-10V signal
- 17 Answers
- 76619 Views
- Sofcon, I also Faced
- E-Mail Answers
Answer Posted / banibrata
In case of voltage transmission(here 0-10V)
1.there will be voltage drop along the transmission wire.
2.if we use 0 volt then we will be unable to find whether
the obtained 0 volt output is really the system output or
its due to instrument error.So for "live zero" concept we
need to give a particular value(other than zero) in the
lower range value.
3.Capacitive and magnetic effect due to voltage
transmission will be more than that in case of current
transmission.
4.2-wire transmission is not compatible with voltage
transmission.
But in case of 4-20 mA signal the above problems are solved.
1.In series transmission same current flows through the
ckt.So no current drop occurs.
2.Here the lower range value is 4 mA.So we can easily
detect after looking at the o/p whether the instrument
error occurs or not.In case of instrument error zero
reading will be shown.
3.2-wire transmission is compatible with it.
| Is This Answer Correct ? | 52 Yes | 5 No |
Post New Answer View All Answers
if in a level tx height is given, how u calculate the ranges of the tx?
what is the vital subject for scoring bhel exam&what is the question pattern
How vortex sensor used for steam flow measurment can be checked on line i.e without taking out from process line.
what is different between 2,3&4 wire rtd and how much maximum distance using plc to field.
What is Span Error
How to Calibrate Ultrasonic Level Transmitter in field
Pressure tx shows 1 mbar but we need 1000 mbar at this process condition .. how can we sort it out .
Hello to all....I am an Instrumentation Graduate and i am passed out in this year only.. I am unable to find the job in my core instrumentation.. so any boby tell me how to and where to search the job....please...and also tell me i there are any courses offered in the instrumentation stream so i can do it... you can send your suggestions to my mail-id i.e Ganesh20084u@gmail.com ... please..
Explain the burnout feature.
What are de-saturators?
hi my name is rakesh patel i just complited my be in instrumentation & control now i am going to working as a validation engineer in a poject department so what is a scope in a future as a validation engginer ? what line is good for me can any bady give me complete solution please? your regard rakesh patel
in natural gas indirect water bath heater,how to prevent the problem of backfire from firetube during ignition...becoz of this backfire performance of wbh is going low.
types of cable..? Use of every types of cable..?
Please can anybody help for control valve sizing step by step procedure?
plz send me general of ongc
