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Question
why we use 250 ohms across HART CALIBRATOR DURING 
CALIBRATION OF TRANSMITTER
 Question Submitted By :: Guest
I also faced this Question!!     Rank Answer Posted By  
 
  Re: why we use 250 ohms across HART CALIBRATOR DURING CALIBRATION OF TRANSMITTER
Answer
# 1
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.
 
Is This Answer Correct ?    9 Yes 6 No
Xyz
 
  Re: why we use 250 ohms across HART CALIBRATOR DURING CALIBRATION OF TRANSMITTER
Answer
# 2
Loop Impedance required for communicator will be minimum
250ohms
 
Is This Answer Correct ?    4 Yes 5 No
Sankar
 
 
 
  Re: why we use 250 ohms across HART CALIBRATOR DURING CALIBRATION OF TRANSMITTER
Answer
# 3
WE USE 250 OHMS RESISTANCE ACROSS HART CALIBRATOR DURING
CALIBRATION OF TRANSMITTER DUE TO LOAD GIVEN TO TRANSMITTER
FOR COMMUNICATION PURPOSE
 
Is This Answer Correct ?    0 Yes 0 No
Hansdas B.jaiswal
 

 
 
 
Other Instrumentation Interview Questions
 
  Question Asked @ Answers
 
Dear friends, I have a question: We work on a project which has some boilers to provide steam for desalination unit. The boiler area is safe and the only hazard source is the fuel lines of boilers. I want to know according to NFPA standard which type of instrument should be selected on the fuel line: Eex Type or Non-Eex type? Thanks in advance  1
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