Weight values can change over time due to scratches, fingerprints, wear and even corrosion resulting from atmospheric contaminants. Regular checks on the accuracy of your mass standards will ensure the accuracy of your measurements.

Recommended recertification intervals:

• Normal Usage (at least once per week) – Recertify every year
• Heavy Usage (multiple times per day) – Recertify every three to six months
• Light Usage (few times a month) – Recertify every two to three years

When you return your weights to Denver Instrument for recertification you receive a Certificate of Calibration which includes the nominal value and the conventional mass correction value for each weight. It will also list information on the standards the weights were compared against including: identifying number, NIST test number and date the standards were last calibrated.

Our mass metrology lab provides this service at a very competitive price. Call 800.321.1135 or Contact Us for more information.

Downloads
Sample of Certificate of Calibration Literature