4. Using Check Digits
Clearing a Check Digit Scheme
You can clear a check digit scheme from printer memory.
1.In the check digit record created on earlier, replace the A in box A3 with a C.
2.Follow the instructions in Chapter 6, "Entering Data Streams," to create a file on your computer.
3.Type the values from the Check Digit Record in the file. Make sure you have a C in item 3.
4.Save the file.
5.Set the print mode on the printer to "Ready" (see Chapter 7, "Configuring The Printer").
6.Download the file to the printer (see Chapter 8, "Printing").
Sample Check Digit Calculation
There are two types of check digit calculations.
Sum of Products used for bar codes such as
Sum of Digits an alternative to Sum of Products.
Sum of Products
1.Place numeric data in a field. Leave the check digit slot empty.
4 3 8 2 7 C
2.Starting with the last digit before the check digit, assign weights, working right to left. Weights are a sequence of numbers the same length as the field. Digits in the field are multiplied by the weight digits to determine addends for the check digit calculation.
Using Check Digits
