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What's the difference between cold loop test and hot loop test?
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Answer Posted / jain
Cold loop check may also called as continuity test, to identify weather the cable are terminated at its correct terminal blocks from field side instruments to Control panel. At this time no power is present in the loop, or it may be isolated from the power source. It can be done using a Multi meter.
Hot loop check is done after cold loop test to identify the instrument is at correct range, units, and its dependency with the control instrument. so can be change and calibrate using a communicator or manually while the instrument is energized from the panel by 24 volt or vice versa.
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