Answer / amit kumar

by using optical pyrometer

Answer / nk

to rtd(resistance temperature detecter)

how many type of control valve?

10 Answers  

---

What is standard of DCS panel design?and what is step of DCS panel design?wiring and type of connector(screw or DB connector)

0 Answers  

---

how to calculate static pressure in a pipe line,when we know the DP(differential pressure) in the line, area of the pipe? please any one tell me the relation between them..?

2 Answers  

---

What is derating factor in Motor?

1 Answers  

---

what do you mean by CJC (cold junction compensation).?

5 Answers   Jindal,

---

you must show the examples application and give at least 4 types of transducer/sensors that can minimize the failure during the manufacturing of the resistors.

0 Answers   DEWA,

---

what does ip65 signify??what is its NEMA equivalent???

1 Answers  

---

if drum level is low what is interlock? i mean we put interlock to fd fan or id fan ?

4 Answers  

---

Why we use 4 to 20 mA, (This is International Standard) instaed of this can we use 4-16, or 4-24 or 3- 15 or any other range

13 Answers   ONGC,

---

What is the difference between instrument earthing and normal earthing? and why is it necessary to do so?

3 Answers   Atul,

---

Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =

0 Answers  

---

what are the different types of communication cables used in automation and what are the difference in the cables

1 Answers   KN,

---