RJS Inspector D4000 Auto Optic (FIRMWARE version A.05 and Earlier) - Manual (Page 57)

Operator
’
s Guide Appendix G
002-5564 RJS, Minneapolis, MN 50
• See Appendix I for Quiet Zone Analysis descriptions.
• UPC-A symbols with a number system character value of 2 and EAN-13 symbols with a prefix of 20
contain a random weight check digit in addition to the normal Mod 10 check digit. This extra digit is
automatically analyzed and displayed in the Mod Check Data Analysis screen as shown below:
Modck: 1 5 PASS
Expect: 1 5
The 1 is the random weight check digit and the 5 is the Mod 10 check digit. The symbology
specifications allow the check digit to have a value of zero in cases where it is not used
In cases where the random weight check digit is zero, when another value is expected, a Bad
Mod Check Warning will not be issued. The LCD display and corresponding printout will
note the discrepancy with a “CHK” message in place of “FAIL” as shown below:
Modck: 0 5 CHK
Expect: 1 5