Hi James
I hope the meter accuracy can be limited +-2 %,when Vin 90~264V, No matter any load
you can see the Pink line which about +1% accuracy when vin 264V &load 30%
you can see the blue line which about -4% accuracy when vin 90v & load 100%
If I shift the offset Value, maybe blue line can be rising to -2%, but Pink line will shift to+3%
the total accuracy over 5%.
Do you have any V meter or I meter test result which reading was come from evb-adp1048?
thanks