Answer / mathan

proportional -it is the present error and it can be adjusted by gain.
integration - past error and can be adjusted by resetting functions
derivatives - future error and can be calculated by rate of change of time

Answer / carl_ellis

PID provides a modulated output response to an error signal,
where error is the difference between what you want, the
setpoint, and what you have, the process variable.

PID uses an output response proportional to the input span
(P = proportional), modified by the accumulated error over
time (I = integral) and modified by the rate-of-change of
the error (D=derivative).

Carl Ellis
Measure First

Why do we floating DC in DC system.

0 Answers  

---

what is the deferance between LCN and UCN.

1 Answers  

---

Why 4ma - 20ma signal used in instrumentation??

5 Answers  

---

what is the use of glycol filling in seal pot (or) condensate pot in instrument impluse line?

7 Answers  

---

NPN transistor, SCR, Zener diode, LED, Varactor diode, Vortex meter, RTD, Resistor, Crystal

0 Answers   CCIE, RTD,

---

If we increase only P what will be controller action ?

0 Answers   IMECO,

---

Can you tell me how we will select RTD and Thermocouples for Temperature applications. I.e How we will choose accurate one for a specefic operation if both having same ranges

3 Answers   Nippon,

---

WHAT IS ANNUBAR?

7 Answers  

---

How to get Cv of control valve having following parameter ,i.e inlet pressure 4.5kg/cm2 outlet pressure 1 kg/cm2 specific gravity 0.808

3 Answers  

---

hi am durga, i just now completed my eie [2009] , can anyone please guide me what r courses i need to join to enter into core company

6 Answers  

---

Full form of KKS when use DCS.

0 Answers  

---

How to convert m3/hr in tonnes/hr

2 Answers  

---