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

what is the meaning if the control valve CV is 27,in terms of selecting procedure?

2 Answers  

---

what is procedure of calibration of remote seal transmiter, botom to top flanch 850mm, fluid liquid density .73, transmiter fixed on a fractionation colum, under vaccume 10mbar

4 Answers  

---

How does your previous experience relate to the job you are applying for ?

0 Answers  

---

why we use 3 wire rtd direct wiring for temperature measurement instead of temperature transmitter like bearing temperature

0 Answers   ABG Energy,

---

1. what is 3 point calibration & 5 point calibration? 2. If we use hart communicator to set the LRV & URV of a smart transmitter, did we calibrate the transmitter? why? 3. Make a complet list if meterials needed to properly connect a pressure gauge to a steam pipe using 1/2 inch stainless steel tubing. The gauge connections is 1/2 inch NPT-M and the steam pipe tap has a 1/2 inch female coupling, compression fittings are use. 4. What are the tools in loop checking? 5. What would the ISA symbol of a square root extractor look like? 6. What would you do to completely prepare for the configuration? 7. What safety measures must you undertake when doing configuration? 8. what are the two most commonly use programming languages used when we configure a PLC? 9. What would you do if you accidentally skipped a step in the configuration procedure? 10. How would you know if the configuration were sucessful? 11. Name at least 3 selections available when we configure the burnout protection of a controller?

3 Answers   EI Electrotechnical Institute,

---

How is automatic reference junction compensation carried out in temperature recorders?

0 Answers  

---

Why humidity limit is 30 to 55 % for raw material storage?

1 Answers  

---

which gas or which liquid is filled in capillary of dial type temperature indicators on power transformers

2 Answers  

---

what is gas metering system? gas chromatograph? and gas compressors?

0 Answers   HPCL,

---

Working principle of vibration sensor?, Type of vibration sensor? , Can we use vertical instead of horizental or vice versa?, if not Reasons?

2 Answers  

---

What is input and output of vaiberation transmitter and what is its unit.

4 Answers   SMH,

---

TRANSDUSER MOSTLY CONVERT WHICH ENERGY INTO ENERGY ?

6 Answers   DVC,

---