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Check character setting
Code 39 barcode data is not mandatory to include a check character. If there is a check
character, it is the last character of the data. The check character is a value calculated
based on all data to check whether the data is correct. You can turn on or off the check
according to your needs, and set whether to send check characters.
Do not send verification
Check and send verification
Verify but do not transmit verification