Datalogic Magellan 8500Xt Product Reference Manual page 122

Preparing the Scanner/Scale for Calibration
6-4
1. Assure that the scanner/scale is stable.
2. Power-up the scanner/scale.
3. Allow the unit to reach temperature equilibrium for at least one
hour. If the scanner/scale is already at room temperature, allow at
least 15 minutes to acclimate.
4. Before performing the calibration, the scanner/scale must be pre-
stressed with a weight of more than 30 pounds (15kg). With
power turned on, place the entire weight set (including the case)
on the weighing surface of the scale. The display should show an
underscore and three hyphens (_---), which is the overweight
indication.
5. Remove all weight from the weighing surface and ensure that
there are no obstructions in the debris chutes of the scanner/scale.
TM
Magellan 8500Xt Scanner