Running into a problem with a Rosemount 8800D vortex flow meter
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It is a vortex street device used to measure the air flow in a factory; under normal operation it operates at nearly 90% of its full scale. However, after the amount of air used in the factory increased downstream, the reading from the vortex street flow meter decreased instead of rising, to 60%. What could be the reason for this?
The total flow rate in the boundary zone has increased
First, check whether the pipeline vibrates during normal operation.
First, we need to determine what the maximum measurement capacity of this vortex flow meter is. If the range it can measure is similar to its maximum capacity, then reverse flow occurs in the vortex flow meter – that is, when the flow rate exceeds this capacity, as the flow rate increases the indicated value decreases. This phenomenon occurs with all vortex flow meters, and it is a characteristic unique to them.