Answer / deepan.p

split range control means we have only one measurement &more
than one manipulated variable.
ex:
seal steam system of turbine &turbine driven boiler feed
pump.
description
aim of system is to maintain seal steam pressure constant.
it has two control valves name it as seal steam valve&leak
off valve.
upto (4-12)ma(3-9)psi seal steam valve operates
ex:
if its closed for 4 ma its fully open when it receives a
commend signal of 12ma.
after that (12.1-20)ma(9-15)psi leak off valve operated.
ex:
normally it'a fully open at 12ma .if commend reaches 20ma
the valve will be closed .
that what they designed the control system and field control
valve positioner.

rtd principle?thermocouple principle?

5 Answers  

---

How to Calibrate Level Switch in field

0 Answers  

---

What is the difference between antisurge

1 Answers  

---

When can a bypass not used on a positioner?

1 Answers   CCIE,

---

which type of signal used in instrument?

3 Answers   Emco, Makson, Sail, TATA,

---

---

What is difference between Isolator and Barrier ?

1 Answers  

---

Identify the electrical variable that is either directly or inferentially used by various instruments to determine the value of a measured variable.

4 Answers  

---

how many types 0f thermocouples?

6 Answers   HZL,

---

How a Flow Transmitter Works?

1 Answers  

---

if we have 380 KVA DG. how to calculate Power Factor. With detailed formula

1 Answers  

---

what is the resource block mode in foundation field but ? what is advantages for this

1 Answers  

---

what is diffrence between analog card and digital card in plc.how analog card work,Please explain in detail.Please send it on abhi_vyas@sify.com

6 Answers  

---