please can anyone tell me in detail, what's mean by open
loop and close loop?
Answer Posted / siddhartha mishra
In open loop the varialble is for monitoring purpose e.g.
if we are using a pressure transmitter of pressure
indication only then the connection will be said to be open
loop whereas in closed lood the varialble is measured and
controlled also e.g. if we are using the pressure
transmitter as well as a control valve to maintain the
pressure in the tank then the connections will be said to
be in closed loop
| Is This Answer Correct ? | 21 Yes | 2 No |
Post New Answer View All Answers
I want to know the questions asked in ONGC interview(after being selected in the written exam) for Instrumentation branch.Kindly help.
What are the error values can accepted in flow transmitter calibration?could u give any formula for this?
What pressure results for a flow transmitter of range 0- 180t/h in the dcs and 0-301mbar in the field using square root extraction. Kindly also suggest formulae for the percentages 0,25,50,75,100?
How to calculate P,I&D value in PID controller ?
how works encoder in plc
What are the application of bernoulli’s theorem?
hiii.... can any one provide me previous years question paper of hindustan petroleum for instrumentation engineering???
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
Differentiate between ultrasonic flowmeter and radar type flow meter
model question paper of instrumentation for Jindal GET 2010.plz reply sudhanshukumar08@yahoo.com
What is super thermocoupal?
what is use of communication wire in multipare cable(oil and gas field), why this communication wire not used in single pair cable?
what is interface level measurement.who can calibrate interface level measurement transmitter online
typical loop drawing of a simple feedback control comprising of one transmitter and one control
What are the types of valves?