what is the difference about HART, and 4-20mA signal?

8 Answers  

---

what is working principle of presure and temperature guage?

4 Answers  

---

What is the three element? And how it work?

1 Answers  

---

What FLOW METER generally used in Gas plant?

5 Answers   Gasco,

---

Hi friends, from Aug 4th onwards iam getting spikes for analog inputs in our DCS for a period of 800ms. I throughly checked every thing, finally i found that the DI, DO's from MCC panels shields are terminated in the Signal Earth where Analog Input signals shields are terminated. Is there any problem with this type of termination?. i checked the induction voltage from MCC and getting around 25VAC, please suggest me in this concern. Our plant is 8months old only. DCS is Siemens Make Simatic PCS7, and the transmitters are Yokogawa make.

1 Answers  

---

---

When LP SURGE happening in compressor

3 Answers   KNPC, KOC,

---

I am going to attend a recruitment drive by Schneider in 2 weeks. They have a technical test in the beginning. I would like to know what are the areas i should concentrate on while preparing for the test. My major is Electronics and Instrumentation.

1 Answers  

---

What is Vena contracta?

3 Answers   CCIE,

---

what is the path to communicate from profi to ofc.what is the means of communication.what is multi cire cable in ofc.

1 Answers  

---

plc trouble shootings?

3 Answers  

---

Exothermic reaction./ endothermic reaction

0 Answers   CCIE,

---

Any one can help me to identified, how can we interchange the device in FF

0 Answers   Ion Exchange,

---