Balance / Scale Calibration CALIBRATION PERFORMED ONSITE AUTHORIZED SERVICE CENTER Cosmetic and functional cleaning of the balance. Preventive maintenance is performed. The balance is repaired if necessary. Heusser Neweigh maintains a large inventory of balance parts and loan balances. Span and linear calibration are conducted. Calibration is performed using precision NIST-traceable calibration standards for accuracy. A calibration label is affixed to the balance or scale. A NIST-traceable certificate is issued to fit your regulatory needs. (See Chart Below) A Basic Balance Calibration Certificate is available to satisfy the need for a basic certificate of calibration. A Compliant Balance Calibration Certificate is used by companies who maintain high laboratory standards, and meets the requirements of most regulatory agencies.. A Comprehensive Balance Calibration Certificate & Report is the highest level of calibration and satisfies the requirements of ISO 17025.