Instruction manual
Matrix 400™ Reference Manual 
5 
9 MAINTENANCE 
9.1 CLEANING 
Clean the reading window (see Figure A, 1) periodically for continued correct operation of the 
reader. 
Dust, dirt, etc. on the window may alter the reading performance. 
Repeat the operation frequently in particularly dirty environments. 
Use soft material and alcohol to clean the window and avoid any abrasive substances. 
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