Hi Jose,
Are you getting from ADC codes to voltage correctly? (refer to table 8 in the ADS1232 datasheet).
The conversion from volts to "weight data" will depend on the load cell characteristics. Typically, the load cell will have a specified full-scale sensitivity, such as "1.0mV/V", which implies that a fully-loaded load cell will output 1mV per 1V excitation voltage.
Regards,
Chris