I am trying to calibrate for Phase and active power using a reactive load with a power factor of 0.5. I am using the App note: AN1075. The value I calculated for LINECYC register=26966; period=1424, WATTHR_REF=10000; Vrms_nominal=120V, Irms(Nominal)=4A.
The value of WATTHR I read after IRQ0 interrupt is triggered is: 1050; I am wondering why this value is way less than LINECYC register value.
According to the equation on page 7 of the App note, AWGAIN is supposed to be less than 1.
Could anyone please comment on this?