Pass SEMI Checksum Despite Misreading of SEMI OCR

Matter:

When reading a SEMI OCR, SEMI checksum is passed even though it is obviously misread.

Probable Causes:

• SEMI checksum can be passed if it misreads more than one character, which is SEMI checksum spec.
• Next, SEMI checksum is passed even though it is misread, which actually occurred.

There are no actual images, but these are other examples:

• Incorrect: CP4FU248SEF7(SEMI checksum passed)
  Correct: CL4FU248SEE7
• Incorrect: MLF4U152WAD7(SEMI checksum passed)
  Correct: M6E4U152WAD7

Solution:

• If you specify "SEMI with Virtual" instead of "SEMI" in the "Checksum" field, the acceptance of Virtual checksum will be reliable.
• By setting the "Character Threshold" item to a higher value, you can strictly judge against erroneous characters.