Scantron OpScan 4ES Operator's Manual page 220

Chapter : Bar Code Reader
Troubleshooting
200
• The edges of the label are not frayed or lifted (if
the bar code is a label).
• The label is affixed in the proper spot and aligned
parallel to the guide edge (if the bar code is a
label).
6.
Test the function of the bar code reader using the
procedure in the section that follows.
Scantron OpScan 4ES and NSIGHT 4ES Scanners