NCR 74 OFX (7874) - Label Orientation; Active Scan Zone; Multiple Reads

4-10 Chapter 4: Operation
Label Orientation
BecausetheRealScan74producesanomni‐directionalscanpattern,barcodelabels
canbereadfrommanydifferentangles.TheRealScan74readsthelabelsonthe
leadingsideofapackage,thetrailingside,thebottomside,thetopside,theside
oppositetheoperator,andthesidenext
totheoperator.Productscanbereadfrom
righttoleftorfromlefttoright.
Active Scan Zone
Theactivescanzoneistheareawheretheunitcanreadabarcodelabel.Thecolored
linesintheillustrationsindicatethisarea.Theillustrationontherightshowsthescan
zonefortheleading,trailing,bottom,andtheback(oppositetheoperator)sides.The
illustrationontheleft
showsthetop‐downzonewheretheunitcanreadthetopofan
itemandthefront‐upzonewheretheunitcanreadthefrontofanitem.
25504
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Multiple Reads
Onlyonegoodreadisreportedifabarcodelabelisplacedonthescannerwindow
andleftthere.Thescannerfirmwareinhibitsasecondreadofthesamelabelifit
occurswithinapresettimeofagoodread.Thepresettimeisprogrammablefrom350
msto
450ms,then450msto1500ms—inincrementsof150ms.Thedefaultis450ms.
Toreadthelabelasecondtime,removethelabelfromthescanwindowandscanthe
labelagainwhenthetime‐outperiodhaselapsed.