• New Check Digit
0
• Data with check digit is:
823450
The MSI Mod 11 check digit is calculated as follows:
The example bar code data is:
943457842
• Assign a checking factor to each number, starting with the units position of the number (in this example,
the 2) up to the highest order position (the 9). Use checking factors of:
2,3,4,5,6,7,2,3,4,5,6,7...
• Multiply the checking factor with its assigned number and add the products:
4 + 12 + 32 + 35 + 30 + 28 + 6 + 12 + 36 = 195
• Divide the sum by 11
195/11 = 17 remainder 8
• Subtract remainder from 11
11 - 8 = 3
• New Check Digit
3
(If the remainder is 10, no check digit is added.)
• Data with check digit is:
943457823

How to scan a bar code

The RF Terminal is available with an optional internal laser bar code scanner. This section will include
information on different scanners as well as how to use each one. You can use this information to compare
the built-in scanner with other types of bar code scanners that are also available from Worth Data.

Laser Scanners

If you are using a laser scanner, technique is not critical. The scanners are “point-and-shoot”; you can’t
miss. Upon triggering the beam, the laser scans the bar code multiple times (100 scans per second) until it
has a good read, at which point it automatically shuts off. These scanners are more expensive, but virtually
foolproof. They read from a distance, so they are much more convenient for distance shelf scanning or
scanning in tight spots. Different laser scanners have different distance capabilities. Table M-1 shows the
comparison of all the laser scanners available from Worth Data.
Table M-1. Scanner Comparison
Chart
6 mil = high density 40 mil = low
density 100 mil = very low density (with
paper and retro-reflective label stock)
Scanner Hi Density
Code 39
UPC
100%
40 mil
Code 39
Paper
100 mil
Code39
Retro-Reflective
100 mil Code
39
LZ150 Laser 0.5” – 4” 0.5 - 7” 1” – 12” na 20” – 40”
LZ400 Laser 0.5” – 9” 0 – 17” 3” – 44” 9” – 50” 18” – 9.5 ft.
Integrated
Laser in
Terminal
1'" – 7" 0 – 10" 4" – 29" 10" – 32" 18" – 6.5 ft.
PSC Long
Range
7” – 11” 7” - 31” 11” – 9 ft. 24” – 15 ft. 48” – 17 ft.