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Water Treatment Plant High Service Distribution of potable water.
2 separate insertion McCrometer multi-mag insertion meters model 395X (installed 2015) Lets call them A and B. The meters work fine with any combination of our 4 motors/pumps. Subsequently, we added a 5th motor/pump that has an Eaton VFD Drive (our only VFD Motor). The Motor and VFD is from October 2015.
When this motor is run either alone or in any combination with the 4 other motors/pump the Flow Meter A begins to have highly erratic measurements and B continues to measure accurately.
We have re-grounded the entire MCC panel to 2 earth grounds outside. We have grounded the Flow Meter A multiple ways and triple checked wiring, shielding, etc. We have ensured that the VFD Motor is on a seperate pole than the Flow Meter Transmitters.
We are considering adding EMF Filters before the Flow Meter Transmitters.
What else may we try? Is it a bad Flow Meter? Will filters work? I know there are many many variables.
2 separate insertion McCrometer multi-mag insertion meters model 395X (installed 2015) Lets call them A and B. The meters work fine with any combination of our 4 motors/pumps. Subsequently, we added a 5th motor/pump that has an Eaton VFD Drive (our only VFD Motor). The Motor and VFD is from October 2015.
When this motor is run either alone or in any combination with the 4 other motors/pump the Flow Meter A begins to have highly erratic measurements and B continues to measure accurately.
We have re-grounded the entire MCC panel to 2 earth grounds outside. We have grounded the Flow Meter A multiple ways and triple checked wiring, shielding, etc. We have ensured that the VFD Motor is on a seperate pole than the Flow Meter Transmitters.
We are considering adding EMF Filters before the Flow Meter Transmitters.
What else may we try? Is it a bad Flow Meter? Will filters work? I know there are many many variables.