Answer / inbu raja e k

cascade control strategy is the one in which you have 2
control loops, a primary loop and a secondary loop. The
output of the secondary controller will the reference or
set point to the primary controller.
Cascade control is most advantageous on applications where
the secondary closed loop can include the major disturbance
and second order lag and the major lag is included in only
the primary loop. The secondary loop should be established
in an area where the major disturbance occurs. It is also
important that the secondary variable respond to the
disturbance. If the slave loop is controlling flow and the
disturbance is in the heat content of the fluid, obviously
the flow controller will not correct for this disturbance.
In distillation column it is used as a composition control
where the feed flow is the primary control and condense
flow out is the secondary loop

Answer / amit123.inc

Dear Inbu Raja E K-Actually the output of the primary controller is used as the reference or setpoint for the secondary controller.

How to calibrate electronic type level switch low?

1 Answers  

---

why we are using (-24VDC) and where we r using plz tell me

7 Answers  

---

1.what is the effect of vapour presuure in orifice plate flow measurement 2.which is more effective 2 pressure sensors or one single differential pressure sensor in orifice plate measurement 3.how to design a v/i converter and i/v converter 4.how many type of thermocouple are there 5.how many leads are there in thermocouple measurement 6.how pressure sensors are connected in level measurement in differential pressure method 7.what is the output of capacitive pressure sensor (ac or dc),how its o/p is signal charactarized 8.what is the physical meaning of discharge coeeficient,why it is calculated,orifice plate what is its value,why it is less than 1,Q at upstream is equal to or not equal to Q at downstream of orifice plate why?what is vena contracta in orifice plate 9.why rotameter is called variable area flowmeter,it can measure flow even if area is not varying,why it is made tapered 10.design a 10 bit counter ,which counter you will prefer 11.how to remove self heating error in RTD 12.which is more sensitive pt100 or pt50 13.why thermocouple are connected in parallel 14.what is lead contact error in RTD,how to avoid 15.what is P,PI,PID,PD controller,why there is no ID controller 16.what is override,split range,sequential,ratio,feedforward,cascade controller 17.why we moved from SR to JK and then JK to master slave JK flipflop,give correct reason 18.how to measure level of a closed container which contains vapour and liquid,remember no vapour gas should be leaked,so ultrasonic and capacitive is not an option,design another method 19.how to design horse race counter including sensors and signal conditioning element 20.what is bevelling

0 Answers   BARC,

---

Explain bernoulli’s theorem. State its application.

0 Answers  

---

what is bevel? why bevel required in orifice plate?

2 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  

---

I need the intools training institute address in india. Intools subject oriented local authors books.Refer me plz

3 Answers  

---

for what purpose strain guage is used?

5 Answers  

---

Where do we consider the pressure in mbar & where do we consider the pressure in bar & why is it so ?

2 Answers   BOC, Jindal Steel and Power,

---

what type problems create in radar level transmeter and what is its solution

2 Answers   Essar,

---

Dead weight tester & comparator for calibration , which is more accurate , what is the application.

1 Answers   Bapco Bahrain Petroleum Company,

---

What is the main difference between the terms instrumentation and Automation?

5 Answers  

---