Zebra DS457 User Manual

OCR Reading 11 - 27
OCR Check Digit Validation
Parameter # 694 (SSI # F1h B6h)
Use OCR Check Digit Validation to protect against scanning errors by applying a check digit validation scheme.
The following is a list of options.
None
No check digit validation, indicating no check digit is applied. This is the default.
Product Add Left to Right
Each character in the scanned data is assigned a numeric value (see OCR Check Digit Multiplier on page
11-26). Each digit representing a character in the scanned data is multiplied by its corresponding digit in the
multiplier, and the sum of these products is computed. The check digit passes if this sum modulo Check Digit
Modulus is zero.
Example:
Scanned data numeric value is 132456 (check digit is 6)
Check digit multiplier string is 123456
Digit 1 3 2 4 5 6
Multiplier 1 2 3 4 5 6
Product 1 6 6 16 25 36
Product add 1+ 6+ 6+ 16+ 25+ 36= 90
The Check Digit Modulus is 10. It passes because 90 is divisible by 10 (the remainder is zero).
*No Check Digit
(0)
Product Add Left to Right
(3)

Zebra DS457 Specifications

General

Type	Fixed bar code reader
Wavelength	655 nm
Sensor type	-
Scanner type	1D/2D
Optical sensor resolution	752 pixels
Standard interfaces	USB
Connectivity technology	Wired
Input voltage	5 V
Power consumption	450 mA
Safety	ETL, VDE, CETL, EN60950, Ctick, VCCI
Certification	FCC, RoHS
Product color	Black
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	-20 - 50 °C
Cables included	USB, VGA
Harmonized System (HS) code	84716070

Weight and Dimensions

Depth	58.4 mm
Width	62 mm
Height	29.2 mm
Weight	111 g