Paxar 9401 manual Defining a Check Digit Scheme

9401/9402 System Administrator's Guide

Defining a Check Digit Scheme

See "Sample Check Digit Calculation" later in this chapter if you need help defining the Check Digit Scheme.

1.Make a copy of the Check Digit Record template on the following page, or the check digit worksheet in Appendix D. Use the copy for steps 2 through 7.

2.Assign a number from 1 to 9 to identify this calculation scheme. Write the number in box A2 in the Check Digit Record.

3.Decide whether to add or clear the check digit.

A - Add C - Clear.

4.Decide how the printer will store the Check Digit Record.

R - Printer Memory M - Memory Card.

Write R or M in Box A4.

5.Assign a number from 2 to 10 to use as a modulus in the check digit calculation. Write the number in box A5.

6.Determine how many characters will be in the fields that use this scheme, not including the check digit. Write the number in box A6. The maximum number is 29.

7.Determine how the check digit be calculated. Write D for "sum of digits," or P for "sum of products" in box A7.

8.Determine what numbers to use as weights for check digit calculation. Do not include a weight for the check digit. You need a string of numbers equal in length to the number in box A6. Enter the string of numbers in box A8.

NOTE: Use zero as a weight digit in positions containing non-numeric characters.

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