Answer / jobby c johnson

in process control selection of a particular controller is
based on the application and what are process parameters that
you are going to measure.
based on the external conditions you have to design the data
acquisition system. some times the voltage level will not be
matching, so you requires a voltage translators(eg:).

there will be a process requirement saying that you need the
overall response of the system with in this much time, with
minimum error etc based on those parameters you have to tune
the controller parameters.

What is the minimum rating availalbe for weld neck orifice in market?

0 Answers   Jindal,

---

Related to control system, What is difference between 4-20 mA active & 4-20 mA pasive signal.

1 Answers  

---

How will you change the action of a control valve?

1 Answers   CCIE,

---

Explain the key components of control loop?

0 Answers  

---

How to Calibrate variable Head flowmeter (Orifice), here we dont know High pressure and low pressure then how to apply pressure on HP and LP side ?

1 Answers   Nirma,

---

---

how level can be measured in open tank with reference to pressure

1 Answers   Atul, INOX,

---

What is SCADA ? WHAT is it role in DCS ?

3 Answers   Honeywell,

---

how the transmitter send MA?

1 Answers  

---

How can I map a tank?  Tank 15m h and 42m dia. we just fixed radar type lit. its reading shows over range. Now its required mapping ?

1 Answers   CMC,

---

If we increase only P what will be controller action ?

0 Answers   IMECO,

---

Can any body give detail about orifice sizing?

5 Answers   Essar,

---

PLEASE PROVIDE SAMPLES OF CHEVRON SKILL TESTS

0 Answers  

---