You must first calibrate the measurement instrument to make reliable measurements. If calibration fails, you cannot continue with the measurements.

1. Follow the instructions on the screen and click Next.
   Note: With the EFI ES-2000 or EFI ES-1000 spectrophotometer, both the white tile on the cradle and the instrument aperture must be clean. With the EFI ES-2000, the white tile cover must be open.
2. If you cannot calibrate the instrument successfully, click Cancel.