Honeywell International Inc. QC900A Manuale Utente

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If you hear a single beep tone followed by another single beep of the same 
tone, it signifies a good read.

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If you hear a single beep and then a beep of a different tone, the unit detected 
an error in the scanned symbol.

1. Using the proper scan technique described in step 4 above, scan the 

reflectance page.  You will hear a single beep after the first good scan and 
the following display appears:

2. Continue to scan the reflectance page for a total of ten good scans.  After 

each good scan, a single beep sounds and the display indicates the number 
of good scans you need to obtain.  After the tenth good scan, the following 
window displays: