Answer Posted / ytd

ON/OFF CONTROL VALVE WORKING IN TWO MODE EITHER ON OR OFF.
In ON off control process has shoot up and down. This
process is not suitable for critical processes.
E.G.controlled heating / cooling for Annealing cycle.


PID control generally used in close loop process where
feedback of output is used to correct the input depend upon
the desired process.
S(o/p)= S(i/p)+/-(S(correction).
From this simple equation o/p signal is corrected but
depending upon the responce of the process `Diffential
gain' or integral gain is introduced and this simple
equation is modified.
Depending upon the process performance responce time ang
gain values are to be programmed in the PID controller.
Then PID controller follows the equation to make process
more controlled.

how to calibrate corollaries (Mass flow meter)?

2171

---

What is profibus?

1122

---

What is shielding effect?

2245

---

I WANT SECURITY PAPER MILL, HOSHANGABAD TEST PAPER.KINDLY SEND TO MY MAIL ID

2787

---

Specify ideal accuracy of flow element like orifice plate, Ventury, Annubar. Ultrasonic flow meter etc.

1916

---

for oil & gas industries which zone is normally preferred? why? give its example?

2003

---

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.??

1404

---

Which language of programing is popular? how can i learn it ?

2154

---

In VVVF DRIVES VOLTAGE IS ALSO VARY WITH THE FREQUENCY. HOW? WHAT IS THE DIRECT FORMULA RELATING THESE TWO.

2361

---

why we use cascade control and feed foreword control in 3 element control of boiler drum ?what is feed forward and cascade control system ?

2225

---

What is sensitivity in vibration probes..?

1646

---

How servomotor controls throttle valve of TURBINE?

1955

---

We are using Rosemount 5400 series Radar Level Transmitters in all types of Sump Applications having oily water hdrocarbon petrochemical nature. What we are facing the problem frequently is that always getting reading frezzed at some value. If we do power recycling , sometimes it is working . then making same freezing problem. If anybody faced before such type of problem and also having solution , Please give the answer.

2328

---

What is offset in a control system.

9013

---

In turbine, what does term CDP, NI, NH, HSSOC, means

2772

---