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.

How to connect another 24 volt dc power supply in circuit when previous power supply has become weak.what is the connection?

2 Answers   Bhole Baba Dairy Industries,

---

What is the working principle of sox, nox analyzer?(opacity monitor) Otherwise how to measure the sox,nox?

1 Answers   Thermax,

---

how flame detectors sense the flame.

3 Answers  

---

HOW TO CALCULATE WAKE FREQUENCY FOR THERMOWELL???WITH OUT SOFTWARE..

1 Answers  

---

how do i tune dearator pr control valve using PID. we set the set point is 0.6kg/cm2 now i want 0.5 to 0.7kg/cm2 limits so what should i give p,i,d values. then pls explain how do set pid values for control valve tuning?

0 Answers   SEWA, Sharjah Electricity and Water Authority SEWA,

---

How to decrease opening & closing time of on/off valve?

0 Answers   UPL,

---

How DP Transmitter can be calibrated for crud application in floating roof tank?

2 Answers  

---

what does mean by analog output trim and where this one used for?

1 Answers  

---

How you calibrate absolute pressure with the calibration range of 0 to 1000 0C Absolute. Please explain the procedure for calibration.

0 Answers   Petro Rabigh,

---

HOW CAN I CONNECT ROSEMOUNT 3300 LEVEL TRANSMITTER TO Allen-Bradley SLC500

1 Answers  

---

what is the difference between transmitter and converters?

9 Answers   Videocon,

---

Explain the usage of the PLC system?

3 Answers  

---