Any balance will only give correct results if it is checked regularly, i.e. calibrated correctly and adjusted when required. So a balance is only a reliable measuring and checking tool if it calibrated and this calibration is documented. The issued DAkkS calibration certificates are proof of the metrological traceability to national and international standards, as required by the DIN EN ISO 9000 and DIN EN ISO/IEC 17025 standards, amongst others. KERN recommends a recalibration period of one year.
You can find more information at kern-lab.com - the calibration certificate for balances
The "Owner" field allows you to specify the owner of the balance if you are not the user of the balance yourself.
In this case, the address of the user of the balance will be indicated on the calibration certificate in addition to your address.
If this field is not filled out, the calibration certificate will be issued to your stored address.