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When using coriolis mass flow meters to measure liquids flow with entrained air (especially viscous liquids), the meter reports inaccurate readings. The problem is reportedly related to the meter drive coil running out of energy. Entrained air requires additional energy to drive the meter tube, as the entrained air absorbs some of the energy. The energy is limited by intrinsic safety requirements and therefore cannot be increased. This appears to be a bigger issue with larger size meters (1.5 inch to 3 inch), where the reserve energy is lower than in smaller size meters (0.25 to 1 inch).
Anyone else see similar problems?
Anyone else see similar problems?