how can we calibrate the differential pressure transmitter by using HART communicator

8 Answers   Hindalco,

---

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  

---

With N nodes and B branches what will have a network ???

0 Answers   BSNL,

---

what is a half wave, full wave, and bridge rectifer.

0 Answers   Takreer,

---

in split range control system we are using two control valves,but we have only one positioner and one feed back link.so how we use this one feed back link for two control valves?

2 Answers  

---

what is intrument termination what is commisioning

3 Answers  

---

A RANGE OF TRANSMITTER IS (0-400)B mm abs what is "B"?

1 Answers   HCL,

---

What is the difference between mmwc and mmwg?

0 Answers  

---

How to Calibrate Penumatic Transmitter.LRV= -60 URV= -20.Can u give me Answer.

9 Answers   ABB,

---

why we cant transmit the dc current easily

1 Answers  

---

what is function of vibration, and how is it work, explain with difination

1 Answers   Bapco Bahrain Petroleum Company,

---

What is deffrence between Battery and capacitor

3 Answers   Siemens,

---