How can we check Zero of DP type Level Transmitter onside?
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Answer Posted / muhammad yasir
close HP isolation valve open HP side drain valve.Transimiter read maximum Differential pressure and Transimiter show O% Level or 4ma because LP lmpluse line liqued act pressure on LP side Transimiter.
When span check close both HP and LP side valves and open drain valve Transimiter read 0 differential pressure.Transimitter show 100% level or 20ma.
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