- 108 -   © 2018 unitech Electronics Co., Ltd. All rights reserved. 
unitech is a registered trademark of unitech Electronics Co., Ltd.
 
MS282 User’s Manual 
3.15.2 Security Level 
The engine offers four levels of decode security for delta bar codes, which 
include the Code 128 family, UPC/EAN/JAN, and Code 93. Select 
increasing levels of security for decreasing levels of bar code quality. There 
is an inverse relationship between security and engine aggressiveness, so 
choose only that level of security necessary for the application. 
 
•Security Level 0 - The engine operates in its most aggressive state, while 
providing sufficient security decoding most in-spec bar 
codes. 
•Security Level 1 - This default setting eliminates most misdecodes. 
•Security Level 2 - Select this option if Security Level 1 fails to eliminate 
misdecodes 
•Security Level 3 - If you selected Security Level 2 and misdecodes still 
occur, select this security level. 
Note: Selecting this option is an extreme measure against mis-decoding severely 
out-of-spec bar codes, and significantly impairs the decoding ability of the engine. 
If this level of security is required, try to improve the quality of the bar codes. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Security Level 0 
 
Security Level 1* 
 
Security Level 2 
 
Security Level 3