When you measure color patches, the measurements are validated against a set of rules that are designed to detect errors in measurement values and to enable you to scan strips in either direction.

If an invalid measurement is detected, you can repeat the measurement.

Incorrect measurements can result from these causes:

• You measure the wrong strip, even though it is on the correct page.
• You measure the wrong page.
• The page has printing defects that produce incorrect colors.
• The printer or the media has a condition that causes unexpected colors.