How to get accurate readings in ADE7763's Vrms register

Hello everyone,

                      as I am using ADE7763 to measure the Vrms,Irms and Active power.

but when i am reading the Vrms register as the method suggested in the datasheet of ADE7763, i did not get accurate readings of VRMS register.

i am doing the following method to read the Vrms register.

do

{

     Rstatus = Read_Reg(0x0C);

     Rstatus = (Rstatus & 0x0010);

}while(Rstatus == 0x0010);

Vrms = Read_Reg(0x17);

here The readings of the Vrms register are varying randomly from min to max. readings and also there is while(Rstatus == 0x0010) infinite loop there that stuck the execution of programm if interrupt not occures.

so is there any other ways to read the Vrms register accuratly.