Answer / koolfire

P,PID controller'S are used to tune the output to a desired value.
however for proportional controllers it always has a steady state error as the output will never reach the desired value but will be close to it.

For  a PID controller due to its integral and derivative action(rate of change of error), it cancels out the steady state error.

Is there any relation between Artificial Intelligence and Instrumentation?

0 Answers  

---

I want to know if flowrate increases in 16' pipe line what will happen to upstream pressure and why?

1 Answers  

---

what is intrinscily safe system and where we use?

0 Answers   DEWA,

---

why the SCAN time of DCS is more & that of PLC is less? if the SCAN time of DCS then why we use DCS.

4 Answers  

---

Can anybody tell me how to select the size of earthing cable for DCS & PLC system.Please tell me any relevant answer here or mail it to me.

0 Answers   Essar, Sail,

---

Why integral control mode call Reset controller?

1 Answers  

---

What is the different between of rtd and thermocouple ?

6 Answers  

---

What information needs for Control Valve "sizing"

1 Answers   Qatar Petroleums,

---

What is an SCR?

4 Answers   GAIL,

---

How would i calibrate a new commissioned flow transmitter???

3 Answers  

---

How will you change the action of a control valve?

1 Answers   CCIE,

---

Drum level tx with GP4 with zero elevation:7300mmh20 on HP and 8050mmh2o on LP as range but on commissioning the tx readiing is max,Why this reading?

0 Answers  

---