Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / raj
it predict the changes in the controller before they occur
and makes neccessary corrections before only.
| Is This Answer Correct ? | 0 Yes | 18 No |
Post New Answer View All Answers
what is the different between deflection type measurement and null type measurement in RTD?
what is compensation? temprature & pressure
Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =
why we us isolation barrier in hazardous area how it works to protect the area and please clarify its current flow.
how u choose thermowell lenght n pnumatic C/v size?
Exothermic reaction./ endothermic reaction
Sir , i have completed my M.Sc In Instrumentation and presently working in Maintenance department 3 yrs Exp , is there is any possible for work in offshore ..
How oil line flow measured?eplain about instruments used and working principle?
Which is your favourite subject & explain any one topic of it.
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..?
How to decrease opening & closing time of on/off valve?
What is force balance principle? State some of its’ advantages.
what is KV and XV valve
how is work pressure switch& level switch?what is the principle of this?
Explain the working of rota meter.
