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Attached is a drawing that shows how to monitor a DC voltage change with the HOBO UX120-017 and the HOBO UX90-001.
Attached is a screenshot from a data file generated by a HOBO UX90-001 configured to log pulses from the T-WNB-3D-240 Wattnode kWh Transducer and (2) 100A Current Transformers connected to a 240VAC