why can't we use 5-20mA standard or some other instead of 4- 20mA?

6 Answers   Emerson,

---

which types of oxygen analyzer describe with drawing ?

2 Answers  

---

What is the relationship between GAIN and PROPORTIONAL BAND.

1 Answers   Kharafi National, Sabic,

---

WHAT IS THE DIFF BETWEEN FREQUENCY AND INTENSITY?HOW IT WORKS IN FLAME SCANNER ?

1 Answers  

---

in DCS or PLC we can not put all ai or di,there is calculation through which we can accomodate certain no of digital and analog signal.I need to know that calculation

1 Answers  

---

Why the Air Tank Accumulators required for the single acting actuators SDV's or BDV's as I see in some Schematic diagrams of ROTORK ??

2 Answers   L&T, Siemens,

---

What is Modbus communication

0 Answers  

---

What is the difference between modbus,fieldbus & profibus

0 Answers   NSL,

---

is motorized valve closed when power shutoff?

0 Answers   Unilever,

---

what is AWG?

2 Answers   NTPC,

---

why we use cascade control and feed forward control in 3 element drum level control measurement of steam drum .what is cascade and feed forward control system ?give example .

0 Answers   Visa Steel,

---

if i change range of flow transmitter in th field then does it need to change range in dcs?

3 Answers  

---