Epson C850081 ( Color Calibrator User Manual page 24

5. Click the Calibration button, or press the measure button at
the top of the calibrator to measure the color.
Note:
Do not measure the pad under strong light or direct daylight as this
may render the measurement inaccurate.
After you finish measuring the black circle, the message in the
window changes to Please calibrate white point.
6. Place the sensor tip on the color pad's white circle. Repeat step
5 to measure the color.
7. After you finish measuring the white circle, click the Done
button. Without closing the ColorWise Pro Tools utility,
continue on to the next section.
3-4
Calibrating Your Printing System