Dependent validation for control check relationship

Hi,

I need to map a requirement where one meter having two registers should have the same reading within a defined percentage. Any deviation should result in an implausible read.

I have configured a register relationship at the register group level with dependent validation 02 (contol,check) and validation group 004 but different readings do not result in implausible reads.

Could anyone let me know the step wise approach for doing this or where i might have went wrong.

Thanks,

Monis Shakeel