Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / scheau vlad
The positive feedback is when in control room, at console,
operator recive correct all signals from field durring loop
check.
The negative feedback is when he don`t recive some of the
signals, for example testing one control valve with limit
switch, he dont see in the console the indication of the
limit switch.
I hope is usefull answer :)
| Is This Answer Correct ? | 6 Yes | 15 No |
Post New Answer View All Answers
what is actual drum level and compensated drum level?
what are the different types of Protocols? & their applications.
What is the difference between uv and ir scanners? and what is the workig principle of both
how to measure oxygen which methods are using?
what is a half wave, full wave, and bridge rectifer.
what is the importance of CV in the control valves? how it is calculated?
Who to difference between analog in & analog out in dcs?
why micro controller 8051/52's clock frequency is internally divide by 12 ?? and why it is further divide by 32 in UART serial communication ??
If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , so what to do for solve this problem. The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?
Why grounding is necessary? Give example with diagram.
SOME OF YOUR QUESTIONS ARE NOT MAKING ANY SENSE SO TRY AND PUT IN A LITTLE BIT MORE EFFORT BEFORE YOU POST A QUESTION. WE WILL ONLY HELP THOSE WHO WE CAN SEE ARE TRYING TO HELP THEMSELVES.
What is force balance principle?
please tel me the calibration of pneumatic controler.
how can leve transmetter calibate in feild .and also put cv and flow plz .....
how u calibrate sox nox co2 co in cemps?what is opacity n HPm?tell the standard parameters of cems?
