If the 'OPOS' option was selected in the Scale field,
you must enter the OPOS driver name for the scale here.
Both the Programmatic ID and the Logical Device Name can be used as the Device Name for the scale.
You can find the Programmatic ID and the Logical Device Name in the registry:
HKEY_LOCAL_MACHINE\SOFTWARE\OLEforRetail\ServiceOPOS\Scale.