I am facing problem while calibrating watt. My VRMS = 225.91 and IRMS = 0.332. The problems occur with WattHr and VAHr ragisters. The values are as followed
AWATTHR = 64685 & AVAHR = 46
BWATTHR = 63976 & BVAHR = 1602
CWATTHR = 1565 & CVAHR = 1602
Next is the steps i am using for calibrating
1. Clearing Watt Gain, VAR Gain and VA Gain
2. Selecting phase in MMODE reg
3. Writing LCYCMODE = 0xBF
4. Writing LINECYC = 0x800
5. Setting LENEGRY Bit
6. Reset interrupt status register
7. Reading AWATTHR,BWATTHR,CWATTHR and AVAHR, BVAHR, CVAHR.
8. My accumulation time is 6.8s
9. Using formul 60. My watthr ecpected is 510.0085
What do i need to do further?? Please check the AWATTHR,BWATTHR,CWATTHR,AVAHR,BVAHR & CVAHR register values. Is the values are correct.?? Check the steps for any errors.
Help me to calculate energy.