Answer / xyz

If we do not use 250 ohm resistance then our HART calibrator
shall connect directly to power source, hence it won't be
part of our transmitter loop.

Answer / hansdas b.jaiswal

WE USE 250 OHMS RESISTANCE ACROSS HART CALIBRATOR DURING
CALIBRATION OF TRANSMITTER DUE TO LOAD GIVEN TO TRANSMITTER
FOR COMMUNICATION PURPOSE

Answer / sankar

Loop Impedance required for communicator will be minimum
250ohms

Answer / mohamadmerajalam

 I think 250 ohm use for drop the crrunt of circuit .If  I  use above the 250 ohm  i can't get sufficient output crrunt.one thinks more that if you increase or decrease the ohm as well as output crrunt  will be increase dearead . that's why i can't  exceeds resistance value 

Is that Speed Probe and Vibration Probe sensors are same,if yes what is the diff b/w them?

2 Answers  

---

what type of cables are used for f&G systems and detectors, what is the standard colour?

2 Answers   Punj Lloyd Ltd,

---

is fan is a transducer or inverse transducer?

5 Answers  

---

how to make a calliberation for deffirential pressure

3 Answers  

---

I WANT TO KNOW SOME BASIC CONCEPTS RELATED TO INSTRUMENTATION

4 Answers  

---

what should be the attitude while answering an interviewer?

2 Answers  

---

Why Flow measure in Square-root?

12 Answers  

---

what is cold loop? difference between hot and cold loop?

0 Answers   Adani Power,

---

Who to difference between analog in & analog out in dcs?

0 Answers  

---

dear sir we have insatlled positioner model no.sipart PS2 make Siemens at our control valves . now problem is if we want to increase the response of valve opening speedy /fast. what parameters do we change for positioner ? any idea. please guide us.

0 Answers   CPL,

---

can anyone tel the syllabus or previous year question paper for BHAVINI(EIE)2014.

0 Answers   Bhavini,

---

selection of the zener barrier for the hazardeous area zone 0

0 Answers   Siemens,

---