Zebra Technologies TLP 3844-Z - Manual (Page 21)

Auto Calibration
NOTE: If you are using pre-printed labels, pre-printed label backing, or
continuous media, see “Manual Calibration” on page 40.
An auto calibration is performed when the printer is turned on (if media is
loaded) or after a media error is cleared. When it is auto calibrating, the
printer sets the sensor levels for, and determines the length of, the label you
are using.
If the status light flashes red, refer to “Manual Calibration” on page 40.
980441-001 Rev. A 13