Answer / piyush gaur

p stand for proportional, i stand for integral , d stand for
derivative.
It is most widely used in industries. Its mechanism is based
on feedback(feedback controller). It calculate an error
value as the difference between a measured process variable
and a desired set point. it minimize the error.

Answer / abhi

pid means praportional integaral and derivatives.
it is used to minimise the error between process value and
set value (pv-sv) to maintain the process in smooth
condition.

draw a loop drawing of vibration beginning to end

1 Answers  

---

what is written on orifice plate?

4 Answers  

---

Is there’s power on the bus (if so, state whether on the signal bus, or on a separate in the following: a) HART b) Profibus DP c) Profibus PA d) DeviceNet e) Foundation Fieldbus

1 Answers   EIT,

---

i have one tank of 500mm height, which is in under vacuum of 735 mmHg, I want measure level of the same using DPT , SO WHAT WILL BE THE URV & LRV, DENSITY OF THE TANK FLUID IS 0.95. is there necessary to fill the LP side with fluid.

7 Answers  

---

i have height of stem drum level 1000mm.how i calculate the DP transmitter

2 Answers  

---

Dear Sir/Madam,im going to attend Hpcl written exams on feb 17th in instrumentation stream..can anyone send me the HPCL model papers and pattern of HPCL ....i ve not yet attended anything in HPCL...so i dont know how it comes...so just i need some model test papers and pattern ..pls help me friends...

0 Answers  

---

can i calibrate DP transmitter online (while Tx in Service) if yes ,how?

1 Answers   CEPC,

---

Why not come out analog output in ABB EL3020 when display show correct value

0 Answers  

---

what is diff b/w neutron and ground?

3 Answers  

---

what should be the attitude while answering an interviewer?

2 Answers  

---

Why we use 250 ohm resistor in series with HART protocol communication?

13 Answers   Chemtrols, Instec, Sabic,

---

Why is a dead weight tester so called by that name?

1 Answers   SGS,

---