Answer / pralay kumar jana

In two transmitter, power-supply is provided through two
wires and signal also returns through the same wire.

But in case of four wire transmitter, power-supply is
provided through two wires, while signal returns through two
other wires.

Answer / george s

In the two wire transmitter one wire shall be the power
wire and the other wire will be the return wire(4-20mA)

Where as in the 4 wire transmitter (2 wires for power
supply and the other two for the 4-20 mA output)

Answer / aravind

in 2 wire X'mtr we are following wheatson bridge method ,so it need only 2 wire but in 4 wire x'mtr we following induction method like limit switch so its need 4 wire

A pressure transmitter with a range of 0-100 bar.The accuracy of the instrument is 1% of upper range value? The pressure indicating transmitter is showing the system pressure is 50 bar. b. When you include the error, what is the minimum possible pressure in our fuel gas system? i. 49.5 bar ii. 49 bar iii. 1 bar iv. 0.5 bar We want to change the filter cartridge. We must depressure the fuel gas system. c. After we depressure the system in preparation for maintenance, the transmitter displays a pressure of +0.1 bar. At this time, what is the possible range of pressures in our fuel system? i. +0.099 to +0.101 bar ii. 0 to +0.2 bar iii. -0.1 to +0.3 bar iv. -0.9 to +1.1 bar

3 Answers  

---

How to calibrate level transmitter with use of HART?

0 Answers   Samsung,

---

any body tell me ,contol valve has how many cheractristic? explain it.

6 Answers   L&T,

---

what is meant by nuclear collector?

0 Answers  

---

What is Hysteresis mean in Instrument?

11 Answers  

---

in yokogawa prosef rd safety PLC how to data send frome local SCS to other SCS and other FCS

2 Answers  

---

what is plc?

27 Answers   HPCL, KRL, Noor Company, Petrochemicals, SS Automation,

---

what r the different types of instrumentation cables? give their specification?

3 Answers  

---

WHAT IS ANNUBAR?

7 Answers  

---

uses of profibus?

1 Answers  

---

What is the difference between EPROM & EEPROM.

1 Answers   Sabic,

---

if drum level is low what is interlock? i mean we put interlock to fd fan or id fan ?

4 Answers  

---