Avision AD345GF, User Manual, Page: 134 / 153

7-11
Warning:

Do not interrupt the calibration sequence or try to shut off
the device while it is calibrating. If you stop the calibration
before it has completed, a calibration error may occur. As a
result, when you next power up the unit, an error message
may be displayed, and you will have to power off the unit
and repeat the instructions in this section.

Calibrate the scanner only when color of the scanned image
looks abnormal.

Keep the calibration sheet from dust and debris. Any dirt
may make the calibration chart invalid or impact the
calibration result.

Use only the included calibration sheet to calibrate the
scanner.