In order to keep all Q Graders cupping & evaluating coffee in a consistent manner, there is a mandatory calibration test that certified Q Graders must take every 3 years.
This calibration course is intended for all Q Graders whose licenses have expired or are about to expire. Upon successful completion of the course, the license will remain valid for another 36 months, starting on the day of the expiration.
The calibration process involves 1 reference cupping & 3 cupping flights, each with distinct characteristics. All Q Graders must be in calibration and pass 2 of the 3 flights in order to renew their license and continue to qualify as a certified Q Grader.