Answer / ashish b. patel

when you are open the positioner there are two setting, zero & span. positioner to give 4 mA and set the Zero adjust and valve should be 0% open. after give 20 mA and set to span and valve should be 100% open. this to adjust are very important. after you can give again 4 mA- 0%, 8 mA- 25%, 12 mA- 50%, 16 mA- 75%, 20 mA-100%.

Operational amplifiers

0 Answers   CCIE,

---

what is the tempareture conpensation?what is the use of this?

1 Answers  

---

What is the procedure of mounting new positioner on pneumatic control valve?

1 Answers  

---

What is a snubber circuit?

2 Answers  

---

Why grounding is necessary? Give example with diagram.

0 Answers   Bright Point, DS Group,

---

What is the purpose of valve positioner. Explain 4 uses.

2 Answers   SRACO,

---

find the kp ki kd from the transper function G(S)=29.44s+04707/1.5349s2+s

0 Answers  

---

please can any one tell me clearly about pid tuning i am confusing about this .how to tune pid easly?

0 Answers   HP, Siemens,

---

Can any body help to get Rsemulator 5000 free from internet if possible then give me any link or any help .

0 Answers   Engro,

---

what is the procedure of O2 sensor(ABB) calibration?

0 Answers   Aramco, Samsung,

---

Pls.could any one Clarify the following with an example. 1.At What condition Close on Rise and Close on Fall Pressure Switch contacts are used. 2.If Pressure is abnormal as per set pressure,if connecting Terminal of pressure switch breaks,how the voltage extends to Relay base. 3.Are these contacts come under fail safe philasaphy.

1 Answers  

---

What is instrumentation control?

0 Answers  

---