Hi hmani
I rechecked the REF pin and it is at 2.5 V. I was unable to understand the purpose of removing 100nF capacitor from RCLKIN pin. I have made a PCB, and it is not possible for me to remove and re-solder the components. Maybe if you convince me then I will remove it.
I am using L1 and L2 as a protective measure against electrical surges. Will it be safe for the circuit if I remove them?
For experimental purposes I attached a load of 100Watt to my meter, then measured V1 and V2 w.r.t AGND. I got the following valuse
V1=15mV and V2=59mV
after calculation I got F1=F2=0.2504616357
For SCF=0, S1=S2=1
I should have got C.F=2048*F1=512.945Hz but i was getting only 50Hz..
I don't know whether I am doing the callibration, the correct way or not. 