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We are using Honeywell ST3000 DP transmitter to measure liquid level in a tank in which the pressure is less than atmospheric pressure. It is wet leg DP type measurement. The problem we are facing is that the transmitter reads level less than the actual level in the tank. First we thought this might be due to lowering of level in the wet leg, but this would result in measured level being higher than the actual level in the tank. Any suggestions, please.
Regards,
singhbvirk
Regards,
singhbvirk