An engineering term STALL used in compressor operation what it means?

1 Answers  

---

how checking is done in fiber optic cable? explain the working of RTU?

5 Answers   PSU,

---

Differentiate between PLC, SCADA and DCS systems

1 Answers   Mumias Sugar, SRF, Trimula Industries,

---

why we are giving negative supply for vibration sensors?

3 Answers   Shell, Solex,

---

what is meant by nuclear power plant?

1 Answers  

---

what is the difference between(Flame proof/Explosion proof)& Fire proof instruments.Both are same or different & if different in which way because the transmitter which have approved ATEX flame proof enclouser but it use PTPE O ring & PTFE Head Gasket,so its (fire safe/fire proof)????????

4 Answers  

---

relation between flow and differential pressure.

7 Answers   ABB,

---

Why we are using 4-20 mA as Analog signal transmission other than 3 to 19 or 2 to 18 or 6 to 22 like wise ? What is the reason behind using 4 & 20 mA? Can anyone give proper technical reply ?

5 Answers   Air Liquide,

---

why does a transmitter o/o signal starts from 3-15psi or 4- 20mA?

11 Answers  

---

please give me combustion cntrl interlock details? if possidle drawing also?for this one is there any website ?

1 Answers  

---

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

2 Answers  

---

Please why do we use 4-20ma in instrumentation engineering

1 Answers  

---