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What is difference between loop and zone ?
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Answer Posted / veerabharathi m
zone is the hazardous area
loop is the connection of the intrument from field to whatever system it is connected
loop may be a close loop or open loop
loop means that teh full circuit from sensing element to control valve through dcs, this loop
instruments is located n particular zone, zone is classified harmful things which mix with air and other chemical o2, n2, h2, etc
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