MDF Best Practices

To minimize the undesired multiple outputs during the MDF scanning in hands-free mode, the following are recommended:

• Scan bar codes in a vertical orientation

  

• When creating the MDF programming with multiple groups, the pattern match of should be the most complicated (hardest to match), which equals to the most number of bar codes and criteria. Then Group 2, 3, and so on should be progressively matched more easily.
• When defining criteria, avoid enabling an output when the pattern is not matched. Set Output if NO pattern match set as Discard bar code.

  

• Select Discard scanned bar code(s) NOT within pattern match in the 123Scan MDF setting. For more details, select What is this? located next to this selection.

  

• To prevent double decodes of the same symbol, increase the Timeout Between Same Symbols setting. For more information, refer to Timeout Between Decodes, Same Symbol (Parameter #137, SSI #89h).
• Turn on the aimer of the scanner to assist operators in scanning the bar code in a more consistent manner.
• The following are other reasons a label or bar code may not be decoded while in the field of view:
  • The label is out of focus (too close or too far away).
  • Specular reflection (reflection off a shiny surface).
  • The label is presented at extreme angle to scanner.