What is the exact differences between HART,FOUNDATION FIELDBUS,PROFIBUS?

0 Answers   Jubilant,

---

what is ment by PID controllers? explain with example?

2 Answers  

---

What is compensation for flow ? Why we use compensation ? What are the factors of different compensation ? We not use then what problems may happen ?

0 Answers  

---

An engineering term STALL used in compressor operation what it means?

1 Answers  

---

In 2 wire transmitter 1 wire is used for power and other is used for signal( 4-20)ma In 4 wire transmitter 2 wires are used for power and 2 wires are used for signal (4-20)ma . but my question is "what is the criteria or parameters we have to consider while selecting these transmitters for eg( distance, safety zones etc.

1 Answers  

---

---

my data card only does run in my mobile so how can change it that it run other mobile & computer and i can stor data in my data card

0 Answers  

---

In a ball valve which require 24v dc supply to operate, whose solenoid valve doesn't have any + or - indication, how can we make wiring connectionto solenoid valve?

1 Answers   Process Control Technologies,

---

What does a fire detector detects?

4 Answers   GAIL,

---

what is the procedure of O2 sensor(ABB) calibration?

0 Answers   Aramco, Samsung,

---

what is thermo coupler and how it works

2 Answers   Tisco,

---

Before erect the instrument what should you do?

3 Answers   L&T,

---

what are the following documents comes under loopchecking

1 Answers   Heisco,

---