Monarch 9401 System Administrator Manual page 93

Place quotation marks around the string of numbers, like
this
Check Digit Record
A1 A2 A3
A
A
Generating Check Digits
You can make the printer generate a check digit. This option
is not necessary for UPC or EAN bar codes. The printer
automatically generates a check digit for these codes.
1. Define the text or bar code field
on the Format Worksheet, as
shown in Chapter 2, "Designing
a Format."
2. Find Option 31 on the Format
Worksheet. This option is for
check digits.
3. Write G in box R3, after 31. This tells the printer to
generate a check digit. The check digit will be the last digit
in the field.
4. Write the selector number of the check digit scheme (box
A2 above) in box R4.
NOTE: To allow for the check digit, the maximum number
of characters accepted in the field will be one
fewer than the maximum number in the field.
"65432"
WEIGHTS
A7
A4 A5 A6
4. Using Check Digits
A8
Do not use with:
Option Description
42 Price
60 Incrementing
4-3