Answer / abdul

Positive feedback is giving some amount of o/p to i/p in
phase.Whereas Negative feedback is giving some amount of o/p
to i/p with 180 degree out of phase.

Answer / farooq

what is diffrent between smart and hart communicator

Answer / scheau vlad

The positive feedback is when in control room, at console,
operator recive correct all signals from field durring loop
check.
The negative feedback is when he don`t recive some of the
signals, for example testing one control valve with limit
switch, he dont see in the console the indication of the
limit switch.
I hope is usefull answer :)

How to work temperature gauge?

0 Answers   KJS,

---

please give me the syllabus and sample questions if possible for Instrumentation for Vizag Steel plant MT (Trainee) 2009 exam

1 Answers   Pedvak, Steel Plant, Vizag Steel,

---

hi all plz tell me difrence between analog or digital load cell.

2 Answers  

---

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the physical measurements Total height of tank is 1850 mtr but 0% level is 1000mm above bottom and 100% level is 450 below upper side.What is the LRV and URV and please mention the formula .The SG of LPG is 0.53 and Wet Leg method will be used.

7 Answers  

---

what is meaning of software redundency and hardware redundency?

2 Answers   Honeywell,

---

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

7 Answers  

---

what is dry leg and wet leg in transmeter calibration?

3 Answers  

---

How to Calibrate Interface Level Troll in field

0 Answers  

---

Is there any temperature compenasation for the air flow from FD fan & SA fans which supplies air to the Boiler?

2 Answers  

---

What is standard procedure of manual mapping in Radar type level transmitter?

0 Answers  

---

plz send me placement paper of ongc

0 Answers   ONGC,

---

Can we measure pressure using differential pressure transmitter? If yes then how?

5 Answers   Reliance,

---