Ongoing Performance Checking

After your professional pipette service and calibration is completed it is important to carry out regular checks on your instruments to ensure they are working optimally and within specification.

According to ISO 8655, “the conformity to the acceptable maximum permissible errors shall be tested by the users at regular intervals as part of their test equipment monitoring or analytical quality control routines, for example every three months but at least once a year. Other time intervals may be specified by the users depending upon requirements.”

This can be done by gravimetric testing within your own laboratory. This reference measurement procedure, in which the mean of no less than 10 weighings of a liquid dispensed by a pipette, is used in the determination of uncertainty in gravimetric volume calibration. The measured result in mass is converted into volume,

By using suitable weighing equipment, combined with a professional pipette calibration software, you can ensure your pipettes are being maintained in line with any quality system requirements between services.

Watch the Pipette Calibration Demonstration Video from Sartorius: