- 107 - © 2020 unitech Electronics Co., Ltd. All rights reserved.unitech is a registered trademark of unitech Electronics Co., Ltd.MS852B Plus User’s Manual3.2.16.1 Check DigitNo Check Digit indicates that the scanner reads and transmits bar code datawith or without a check digit. When Check Digit is set to Validate, but Don’tTransmit, the unit only reads NEC 2 of 5 bar codes printed with a check digit,but will not transmit the check digit with the scanned data. When Check Digit isset to Validate and Transmit, the scanner only reads NEC 2 of 5 bar codesprinted with a check digit, and will transmit this digit at the end of the scanneddata. Default = No Check Digit.No Check Digit*Validate and TransmitValidate, but Don’t Transmit3.2.16.2 NEC 2 of 5 Message LengthScan the bar codes below to change the message length. Refer to MessageLength Description for additional information. Minimum and Maximum lengths= 2-80 Minimum Default = 4, Maximum Default = 80Minimum Message LengthMaximum Message Length