why use to 250 ohm for hart protocol and why hart communicator not communicate without 250 ohm 

4 Answers   OMV,

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What is the relation between electronics & instrumentation

2 Answers  

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how many mmwc are eual to 1kg/sq.cm & can we calculate mmwc into tph?

2 Answers  

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can install leveltrol in steam drum for measurment the level of steam drum? if not then why?

1 Answers  

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whatis range of marcury filled tempereture gague

0 Answers   Dr Reddys,

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why use 50% lel methane gas concentration for gas detector calibration instead of 60% lel gas concentration whereas the hi alarm set at 60% lel.

0 Answers   ONGC,

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what is the calibration procedure for magnetic flow meter @ onsite

0 Answers  

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i have an interview in Qatar Petroleum. So please provide the all details abt fire & gas systems

1 Answers   Qatar Petroleums,

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Basics Instrumentation Question

1 Answers   Advantek Fuel Systems,

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when we are using HART COMMUNICATOR why we are using 250 ohm resistance while using HART COMMUNICATOR.

7 Answers  

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In 16' pipeline one pcv is installed which is controlled by PT installed at inlet of PCV.If Flowrate in pipeline increases what will happen to pressure at the inlet of pcv.

5 Answers   Essar, vssc,

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which types of oxygen analyzer describe with drawing ?

2 Answers  

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