Answer Posted / carl_ellis
What kind of feedback is used in DP cells?
In electronic DP transmitters there is no feedback. Field
sensors measure a physical phenomenon but do not use feedback.
Closed loop controllers use feedback (the process variable
reflecting the change in the controller's/final control
element output) and valve positioners use position feedback.
Carl Ellis
Measure First
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
What are the error values can accepted in flow transmitter calibration?could u give any formula for this?
what diffrence b/w plc s7200,300,400
Which types of quections asked in interview for FORMULATION PLANT (PHARMA)
I have energy meter for educational project having 0.5s class but my friend need 0.2s class meter , which one is good for that purpose and what is the actual difference of that two classes , need very easy example also.??
How the warning lamp of a charging-system is activated ?
Define cryogenic?
What is offset in a control system.
What is critcal speed. what is resonant frequency. why we want to cross crtcal speed on higher RPM (early).
What is intrinsically safe system?
i want formula for flow control.am doing project in flow control using orifice . i know value of the flow level(Q) . upstream(p1) pressure, orifice diameter(Do) , pipe diameter(Di) and oil viscosity(Vi) how can i calculate downstream pressure
What are different types of orifice plates?
pls provide me syllabus and old question paper of instrumentation engineering for GET(JSPL)
State some of balance principle’ advantages?
How to work togather like sov,limit switch,proxy switch and booster in xv
what is the working principal of pribe