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 

how to connect transmitter measuring sulfur process? 1-by using long impulse line or 2- by using coated short impulse line

0 Answers  

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which flow meter is use for measuring the open channel flow?

2 Answers  

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generally for transmitter we are giving supply 24vlts?but we are getting output 4-20ma ? how it is possible? is there any operation inside the tx?pls give complete information?

3 Answers  

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why does a transmitter o/o signal starts from 3-15psi or 4- 20mA?

11 Answers  

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I WANT SECURITY PAPER MILL, HOSHANGABAD TEST PAPER.KINDLY SEND TO MY MAIL ID

0 Answers  

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How to calibration a control valve?

0 Answers  

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3. Differentiate between ultrasonic flowmeter and radar type flow meter.

0 Answers  

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Why Ma signal is using for control system?

1 Answers   Petrofac,

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if I did short to both AO connections, channel will burn or what? m sure in AI it will damage to channel. But what will happens in AO?

1 Answers  

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difference between DCS @ SCADA system? and how can use in field

5 Answers   Marafiq,

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what does a positioner in control valve ?

11 Answers  

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sir i m preparing for BARC but i am not getting any papers to prepare for this exam so please send me some sample papers to my i.d for the preparation of barc.

0 Answers  

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