What is the role of P(Protional), I(Integral) and D (Derivative) in PID Controller?

9 Answers  

---

Differentiate between ultrasonic flowmeter and radar type flow meter

0 Answers  

---

What is the function of a diaphagram

5 Answers  

---

Difference between ultrasonic flow meter and radar type flow meter

2 Answers   Dodsal, Qatar Petroleums,

---

How a conductivity sensor & analyzer work at boiler, whats the principle & science is beyond this,How conductivity sensor sence & convert signal & move toward analyzer & analyzer show reading in percent? also what is temperature compensate option in conductivity analyzer

0 Answers  

---

we re giviang 24v supply to transmitter and we getting output from tx?now my question is wht we call this complete proces?

2 Answers  

---

why we use 0.2 to 1.0 kg/cm2 output in control valve

4 Answers   GNFC,

---

When can a bypass not used on a positioner?

1 Answers   CCIE,

---

a pressure transmitter with a range of 0 to 2500kpag has a specified accuracy of 0.5 % of span.It is to be calibrated using a comparison gauge to have an accuracy of 0.1% of span.The comparison gauge has a range of 0 to 3000kpag What is the accuracy ratio? is this ratio acceptable?

2 Answers  

---

if I did short to both AO connections, channel will burn or what? m sure in AI it will damage to channel. But what will happens in AO?

1 Answers  

---

difference between null and deflecting instrument.

5 Answers   ONGC,

---

what is vfd(variable frequency drive)?type of vfd.

2 Answers  

---