Answer Posted / jobby johnson
4-20ma and 3-15psi are the international standards following every where.clearly the range 0-4ma and 0 to 3psi are called live zero. hence we are not using it in signal transmission
y mainly 4-20ma. this is because all the electrical signals from a controller(electronic) should go to a final control element.most probably in process industries it will be a control valve, which accepts 3-15psi. so it is very easy to calibrate a 4-20ma current signal into 3-15psi with the help of i/p converter..moreover 4-20ma range possess good linearity
| Is This Answer Correct ? | 4 Yes | 3 No |
Post New Answer View All Answers
In which principles tx ,pressure gauge,Temp gauge,control valve works?
please tell no. & add. of consultancy who recruit me in power plant as instrumen engg. present i m working in power plant as ass.t instrument engg. thanku mahesh 09226562826
when a magnet is heated?
what is piezoelectric transducer?give an example in power plant n state its principle?
What is Cavitation in a control valve?
basic connection and principle of axial shift sensor n differential sensors in tubine describes n draw......
define feed forward control loop with example and drawing?
Punj lloyd is coming in our Jadavpur Universtiy campus for campus placement. Please send me some hints about the writtend exam. My email id is subratafriends@gmail.com
what is the reason while warning lamp is on while the engine is cranking?
Explain the burnout feature.
Any one can help me to identified, how can we interchange the device in FF
What is Span Error
For crude application in floating roof tank, how to calibrate a DP Transmitter? How is the floating roof weight considered?
all types instrumentation questions want
sir, give me placement papers and interview quistion of birla group company of copper.
